JavaScript/jQuery FileUploader Options

Function parameters:

file:

File

The file that is uploaded.

uploadInfo?:

UploadInfo

Information about the file upload session.

Return Value:

Promise<any> (jQuery or native)

| any

A Promise that is resolved after the upload is aborted. It is a native Promise or a jQuery.Promise when you use jQuery.

jQuery

index.js

$(function() {
    $("#file-uploader").dxFileUploader({
        abortUpload: function(file, uploadInfo) {
            // your code
        }
    });      
});

Angular

app.component.html

app.component.ts

app.module.ts

<dx-file-uploader ...
    [abortUpload]="fileUploader_abortUpload">
</dx-file-uploader>

import { Component } from '@angular/core';

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})
export class AppComponent {
    // Uncomment the following lines if the function should be executed in the component's context
    // constructor() {
    //     this.fileUploader_abortUpload = this.fileUploader_abortUpload.bind(this);
    // }

    fileUploader_abortUpload(file, uploadInfo) {
        // ...
    }
}

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxFileUploaderModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxFileUploaderModule
    ],
    providers: [],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxFileUploader ...
        :abort-upload="fileUploader_abortUpload"
    />
</template>

<script>
import 'devextreme/dist/css/dx.light.css';

import DxFileUploader from 'devextreme-vue/file-uploader';

export default {
    components: {
        DxFileUploader
    },
    methods: {
        fileUploader_abortUpload(file, uploadInfo) {
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import FileUploader from 'devextreme-react/file-uploader';

class App extends React.Component {
    // Uncomment the following lines if the function should be executed in the component's context
    // constructor(props) {
    //     super(props);
    //     this.fileUploader_abortUpload = this.fileUploader_abortUpload.bind(this);
    // }

    fileUploader_abortUpload(file, uploadInfo) {
        // ...
    }

    render() {
        return (
            <FileUploader ...
                abortUpload={this.fileUploader_abortUpload}
            />
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().FileUploader()
    @* ... *@
    .AbortUpload("abortUpload")
)

<script type="text/javascript">
    function abortUpload(file, uploadInfo) {
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().FileUploader()
    @* ... *@
    .AbortUpload("abortUpload")
)

<script type="text/javascript">
    function abortUpload(file, uploadInfo) {
        // ...
    }
</script>

accept

Specifies a file type or several types accepted by the UI component.

Type:

Default Value: ''

The value of this property is passed to the accept attribute of the underlying input element. Thus, the property accepts a MIME type or several types separated by a comma. Refer to the input element documentation for information on available values.

Note that the allowedFileExtensions property disables the uploading of the prohibited file types, but does not restrict these file types in the Open File dialog. To filter file types in the Open File dialog, use the accept option.

accessKey

Specifies the shortcut key that sets focus on the UI component.

Type:

Default Value: undefined

The value of this property will be passed to the accesskey attribute of the HTML element that underlies the UI component.

activeStateEnabled

Specifies whether the UI component changes its visual state as a result of user interaction.

Type:

Default Value: false

The UI component switches to the active state when users press down the primary mouse button. When this property is set to true, the CSS rules for the active state apply. You can change these rules to customize the component.

Use this property when you display the component on a platform whose guidelines include the active state change for UI components.

allowCanceling

Specifies if an end user can remove a file from the selection and interrupt uploading.

Type:

Default Value: true

If this property is set to true, a cancel button is displayed for each selected file.

NOTE

This property applies only if the uploadMode is not set to "useForm".

allowedFileExtensions

Restricts file extensions that can be uploaded to the server.

Type:

Array<String>

Default Value: []

Note that the allowedFileExtensions property disables the uploading of the prohibited file types, but does not restrict these file types in the Open File dialog. To filter file types in the Open File dialog, use the accept option.

chunkSize

Specifies the chunk size in bytes. Applies only if uploadMode is "instantly" or "useButtons". Requires a server that can process file chunks.

Type:

Default Value: 0

Set this property to a positive value to enable chunk upload. The UI component should be configured as described in the Chunk Upload article. When chunk upload is enabled, the FileUploader sends several multipart/form-data requests with information about the file and chunk. The "chunkMetadata" parameter contains chunk details as a JSON object of the following structure:

{
    "FileGuid": string,   
    "FileName": string,   
    "FileType": string,   
    "FileSize": long,
    "Index": long,        // The chunk's index
    "TotalCount": long,   // The file's total chunk count
}

dialogTrigger

Specifies the HTML element which invokes the file upload dialog.

Type:

|

Default Value: undefined

This property accepts one of the following values:

A CSS selector, or a jQuery selector if you use jQuery

jQuery

index.js

$(function(){
    $("#fileUploaderContainer").dxFileUploader({
        // ...
        dialogTrigger: '.open-button'
    });
});

Angular

app.component.html

<dx-file-uploader ... 
    dialogTrigger=".open-button"
>
</dx-file-uploader>

Vue

App.vue

<template>
    <DxFileUploader ... 
        dialog-trigger=".open-button"
    >
    </DxFileUploader>
</template>
<script>
import { DxFileUploader } from 'devextreme-vue/file-uploader';

export default {
    components: {
        DxFileUploader
    }
};
</script>

React

App.js

import FileUploader from 'devextreme-react/file-uploader';
// ...
function App() {
    return (
        <FileUploader ... 
            dialogTrigger=".open-button"
        >
        </FileUploader>
    );
}

A jQuery wrapper

jQuery

index.js

$(function(){
    $("#fileUploaderContainer").dxFileUploader({
        // ...
        dialogTrigger: $('.open-button')
    });
});

A DOM element

jQuery

index.js

$(function(){
    $("#fileUploaderContainer").dxFileUploader({
        // ...
        dialogTrigger: document.querySelector('.open-button')
    });
});

Angular

app.component.html

app.component.ts

<dx-file-uploader ... 
    [dialogTrigger]="targetElement"
>
</dx-file-uploader>

// ...
export class AppComponent {
    targetElement: Element;
    constructor() {
        this.targetElement = document.querySelector('.open-button') as Element;
    }
}

Vue

App.vue

<template>
    <DxFileUploader ... 
        :dialog-trigger="targetElement"
    >
    </DxFileUploader>
</template>
<script>
import { DxFileUploader } from 'devextreme-vue/file-uploader';

export default {
    components: {
        DxFileUploader
    },
    data() {
        return {
            targetElement: null
        }
    },
    mounted() {
        this.targetElement = document.querySelector('.open-button');
    }
};
</script>

React

App.js

import React, { useEffect, useState } from 'react';
import FileUploader from 'devextreme-react/file-uploader';
// ...
function App() {
    const [targetElement, setTargetElement] = useState(null);
    useEffect(() => {
        setTargetElement(document.querySelector('.open-button'));
    }, []);
    return (
        <FileUploader ... 
            dialogTrigger={targetElement}
        >
        </FileUploader>
    );
}

disabled

Specifies whether the UI component responds to user interaction.

Type:

Default Value: false

dropZone

Specifies the HTML element in which users can drag and drop files for upload.

Type:

|

Default Value: undefined

This property accepts one of the following values:

A CSS selector, or a jQuery selector if you use jQuery

jQuery

index.js

$(function(){
    $("#fileUploaderContainer").dxFileUploader({
        // ...
        dropZone: '.test-div'
    });
});

Angular

app.component.html

<dx-file-uploader ... 
    dropZone=".test-div"
>
</dx-file-uploader>

Vue

App.vue

<template>
    <DxFileUploader ... 
        drop-zone=".test-div"
    >
    </DxFileUploader>
</template>
<script>
import { DxFileUploader } from 'devextreme-vue/file-uploader';

export default {
    components: {
        DxFileUploader
    }
};
</script>

React

App.js

import FileUploader from 'devextreme-react/file-uploader';
// ...
function App() {
    return (
        <FileUploader ... 
            dropZone=".test-div"
        >
        </FileUploader>
    );
}

A jQuery wrapper

jQuery

index.js

$(function(){
    $("#fileUploaderContainer").dxFileUploader({
        // ...
        dropZone: $('.test-div')
    });
});

A DOM element

jQuery

index.js

$(function(){
    $("#fileUploaderContainer").dxFileUploader({
        // ...
        dropZone: document.querySelector('.test-div')
    });
});

Angular

app.component.html

app.component.ts

<dx-file-uploader ... 
    [dropZone]="targetElement"
>
</dx-file-uploader>

// ...
export class AppComponent {
    targetElement: Element;
    constructor() {
        this.targetElement = document.querySelector('.test-div') as Element;
    }
}

Vue

App.vue

<template>
    <DxFileUploader ... 
        :drop-zone="targetElement"
    >
    </DxFileUploader>
</template>
<script>
import { DxFileUploader } from 'devextreme-vue/file-uploader';

export default {
    components: {
        DxFileUploader
    },
    data() {
        return {
            targetElement: null
        }
    },
    mounted() {
        this.targetElement = document.querySelector('.test-div');
    }
};
</script>

React

App.js

import React, { useEffect, useState } from 'react';
import FileUploader from 'devextreme-react/file-uploader';
// ...
function App() {
    const [targetElement, setTargetElement] = useState(null);
    useEffect(() => {
        setTargetElement(document.querySelector('.test-div'));
    }, []);
    return (
        <FileUploader ... 
            dropZone={targetElement}
        >
        </FileUploader>
    );
}

NOTE

A custom drop zone (dropZone property) is not supported in useForm upload modes.

elementAttr

Specifies the global attributes to be attached to the UI component's container element.

Type:

Object

Default Value: {}

jQuery

$(function(){
    $("#fileUploaderContainer").dxFileUploader({
        // ...
        elementAttr: {
            id: "elementId",
            class: "class-name"
        }
    });
});

Angular

HTML

TypeScript

<dx-file-uploader ...
    [elementAttr]="{ id: 'elementId', class: 'class-name' }">
</dx-file-uploader>

import { DxFileUploaderModule } from "devextreme-angular";
// ...
export class AppComponent {
    // ...
}
@NgModule({
    imports: [
        // ...
        DxFileUploaderModule
    ],
    // ...
})

Vue

App.vue

<template>
    <DxFileUploader ...
        :element-attr="fileUploaderAttributes">
    </DxFileUploader>
</template>

<script>
import DxFileUploader from 'devextreme-vue/file-uploader';

export default {
    components: {
        DxFileUploader
    },
    data() {
        return {
            fileUploaderAttributes: {
                id: 'elementId',
                class: 'class-name'
            }
        }
    }
}
</script>

React

App.js

import React from 'react';

import FileUploader from 'devextreme-react/file-uploader';

class App extends React.Component {
    fileUploaderAttributes = {
        id: 'elementId',
        class: 'class-name'
    }

    render() {
        return (
            <FileUploader ...
                elementAttr={this.fileUploaderAttributes}>
            </FileUploader>
        );
    }
}
export default App;

focusStateEnabled

Specifies whether the UI component can be focused using keyboard navigation.

Type:

Default Value: true (desktop)

height

Specifies the UI component's height.

Type:

|

|

Return Value:

|

The UI component's height.

Default Value: undefined

This property accepts a value of one of the following types:

Number
The height in pixels.
String
A CSS-accepted measurement of height. For example, "55px", "20vh", "80%", "inherit".
Function (deprecated since v21.2)
Refer to the W0017 warning description for information on how you can migrate to viewport units.

hint

Specifies text for a hint that appears when a user pauses on the UI component.

Type:

Default Value: undefined

hoverStateEnabled

Specifies whether the FileUploader component changes the state of all its buttons when users hover over them.

Type:

Default Value: true

inputAttr

Specifies the attributes to be passed on to the underlying <input> element of the file type.

Type: any

Default Value: {}

jQuery

$(function(){
    $("#fileUploaderContainer").dxFileUploader({
        // ...
        inputAttr: {
            id: "inputId"
        }
    });
});

Angular

HTML

TypeScript

<dx-file-uploader ...
    [inputAttr]="{ id: 'inputId' }">
</dx-file-uploader>

import { DxFileUploaderModule } from "devextreme-angular";
// ...
export class AppComponent {
    // ...
}
@NgModule({
    imports: [
        // ...
        DxFileUploaderModule
    ],
    // ...
})

Vue

App.vue

<template>
    <DxFileUploader
        :input-attr="inputAttr"
    />
</template>

<script>
import 'devextreme/dist/css/dx.light.css';

import DxFileUploader from 'devextreme-vue/file-uploader';

export default {
    components: {
        DxFileUploader
    },
    data() {
        return {
            inputAttr: { id: 'inputId' }
        }
    }
}
</script>

React

App.js

import 'devextreme/dist/css/dx.light.css';

import FileUploader from 'devextreme-react/file-uploader';

const inputAttr = { id: 'inputId' };

export default function App() {
    return (
        <FileUploader
            inputAttr={inputAttr}
        />
    );
}

ASP.NET MVC Controls

Razor C#

Razor VB

@(Html.DevExtreme().FileUploader()
    .InputAttr("id", "inputId")
    // ===== or =====
    .InputAttr(new {
        @id = "inputId"
    })
    // ===== or =====
    .InputAttr(new Dictionary<string, object>() {
        { "id", "inputId" }
    })
)

@(Html.DevExtreme().FileUploader() _
    .InputAttr("id", "inputId")
    ' ===== or =====
    .InputAttr(New With {
        .id = "inputId"
    })
    ' ===== or =====
    .InputAttr(New Dictionary(Of String, Object) From {
        { "id", "inputId" }
    })
)

invalidFileExtensionMessage

The text displayed when the extension of the file being uploaded is not an allowed file extension.

Type:

Default Value: 'File type is not allowed'

invalidMaxFileSizeMessage

The text displayed when the size of the file being uploaded is greater than the maxFileSize.

Type:

Default Value: 'File is too large'

invalidMinFileSizeMessage

The text displayed when the size of the file being uploaded is less than the minFileSize.

Type:

Default Value: 'File is too small'

isDirty

Specifies whether the component's current value differs from the initial value.

Type:

Default Value: false

This property is a read-only flag. You can use it to check if the editor value changed.

jQuery

index.js

$(() => {
    const fileUploader = $('#fileUploader').dxFileUploader({
        // ...
    }).dxFileUploader('instance');

    $('#button').dxButton({
        // ...
        onClick () {
            if (fileUploader.option('isDirty')) {
                DevExpress.ui.notify("Do not forget to save changes", "warning", 500);
            }
        }
    });
});

Angular

app.component.ts

app.component.html

import { Component, ViewChild } from '@angular/core';
import { DxFileUploaderComponent, DxButtonModule } from 'devextreme-angular';
import notify from 'devextreme/ui/notify';

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})
export class AppComponent {
    @ViewChild('fileUploaderRef', { static: false }) fileUploader: DxFileUploaderComponent;

    onClick () {
        if (this.fileUploader.instance.option('isDirty')) {
            notify("Do not forget to save changes", "warning", 500);
        }
    }
}

<dx-file-uploader ... 
    #fileUploaderRef
>
</dx-file-uploader>
<dx-button ...
    (onClick)="onClick($event)"
>
</dx-button>

Vue

App.vue

<template>
    <DxFileUploader ...
        :ref="fileUploaderRef"
    >
    </DxFileUploader>
    <DxButton ...
        @click="onClick"
    />
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import DxFileUploader from 'devextreme-vue/file-uploader';
import DxButton from 'devextreme-vue/button';
import notify from 'devextreme/ui/notify';

export default {
    components: {
        DxFileUploader,
        DxButton
    },

    data() {
        return {
            fileUploaderRef
        }
    },

    methods: {
        onClick () {
            if (this.fileUploader.option('isDirty')) {
                notify("Do not forget to save changes", "warning", 500);
            }
        }
    },

    computed: {
        fileUploader: function() {
            return this.$refs[fileUploaderRef].instance;
        }
    }
}
</script>

React

App.js

import React, { useRef } from 'react';
import FileUploader from 'devextreme-react/file-uploader';
import Button from 'devextreme-react/button';
import 'devextreme/dist/css/dx.light.css';

const App = () => {
    const fileUploaderRef = useRef(null);

    const onClick = () => {
        if (this.fileUploaderRef.current.instance().option('isDirty')) {
            notify("Do not forget to save changes", "warning", 500);
        }
    };

    return (
        <FileUploader ...
            ref={fileUploaderRef}
        >
        </FileUploader>
        <Button ...
            onClick={onClick}
        />
    );
};

export default App;

isValid

Specifies or indicates whether the editor's value is valid.

Type:

Default Value: true

The FileUploader provides alternative validation properties: maxFileSize, minFileSize, and allowedFileExtensions.

labelText

Specifies the text displayed on the area to which an end user can drop a file.

Type:

Default Value: 'or Drop file here', '' (InternetExplorer, desktop)

maxFileSize

Specifies the maximum file size (in bytes) allowed for uploading. Applies only if uploadMode is "instantly" or "useButtons".

Type:

Default Value: 0

minFileSize

Specifies the minimum file size (in bytes) allowed for uploading. Applies only if uploadMode is "instantly" or "useButtons".

Type:

Default Value: 0

multiple

Specifies whether the UI component enables an end user to select a single file or multiple files.

Type:

Default Value: false

name

Specifies the value passed to the name attribute of the underlying input element. Required to access uploaded files on the server.

Type:

Default Value: 'files[]'

NOTE

This property's value should end with square brackets if the uploadMode is "useForm". Refer to the Upload Mode topic for an example.

onBeforeSend

A function that allows you to customize the request before it is sent to the server.

Type:

Function parameters:

e:

BeforeSendEvent

Information about the event.

Object structure:

Name	Type	Description
component	FileUploader	The UI component's instance.
element	HTMLElement \| jQuery	The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.
file	File	An uploaded file.
request	XMLHttpRequest Object	An XMLHttpRequest for the file.
uploadInfo	UploadInfo	An object that provides information about the file upload session.

Default Value: null

jQuery

JavaScript

$(function() {
    $("#fileUploaderContainer").dxFileUploader({
        // ...
        onBeforeSend: function(e) {
            e.request.withCredentials = true;
        }
    });
});

Angular

app.component.html

app.component.ts

app.module.ts

<dx-file-uploader 
    (onBeforeSend)="onBeforeSend($event)">
    <!-- ... -->
</dx-file-uploader>

import { Component } from '@angular/core';

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})

export class AppComponent {
    onBeforeSend(e){
        e.request.withCredentials = true;
    }
}

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { DxFileUploaderModule } from 'devextreme-angular';

@NgModule({
    imports: [
        DxFileUploaderModule
    ],        
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxFileUploader 
        :on-before-send="onBeforeSend" >            
    </DxFileUploader>
</template>

<script>
    import 'devextreme/dist/css/dx.light.css';

    import { 
        DxFileUploader
        // ... 
    } from 'devextreme-vue/file-uploader';

    export default {
        components: { 
            DxFileUploader
            // ... 
        },
        methods: {
            onBeforeSend(e) {
                e.request.withCredentials = true;
            }
        },         
        data() {
            return {
                //...
            };
        } 
    };
</script>

React

App.js

import React from 'react';
import FileUploader from 'devextreme-react/file-uploader';

const App = () => {
    const onBeforeSend = (e) => {
        e.request.withCredentials = true;
    };

    return (
        <FileUploader onBeforeSend={onBeforeSend}>
            <!-- ... -->               
        </FileUploader>
    );
};

export default App;

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().FileUploader()
    .OnBeforeSend("onBeforeSend");
    // ...
)

<script>
    function onBeforeSend(e) {
        e.request.withCredentials = true;
    }
</script>

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().FileUploader()
    .OnBeforeSend("onBeforeSend");
    // ...
)

<script>
    function onBeforeSend(e) {
        e.request.withCredentials = true;
    }
</script>

onContentReady

A function that is executed when the UI component is rendered and each time the component is repainted.

Type:

Function parameters:

e:

ContentReadyEvent

Information about the event.

Object structure:

Name	Type	Description
element	HTMLElement \| jQuery	The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.
component	FileUploader	The UI component's instance.

Name

Type

Description

element

The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.

component

The UI component's instance.

Default Value: null

onDisposing

A function that is executed before the UI component is disposed of.

Type:

Function parameters:

e:

DisposingEvent

Information about the event.

Object structure:

Name	Type	Description
element	HTMLElement \| jQuery	The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.
component	FileUploader	The UI component's instance.

Name

Type

Description

element

The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.

component

The UI component's instance.

Default Value: null

onDropZoneEnter

A function that is executed when the mouse enters a drop zone while dragging a file.

Type:

Function parameters:

e:

DropZoneEnterEvent

Information about the event.

Object structure:

Name	Type	Description
component	FileUploader	The UI component's instance.
dropZoneElement	HTMLElement \| jQuery	A drop zone element.
element	HTMLElement \| jQuery	The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.
event	Event (jQuery or EventObject)	The event that caused the function to execute. It is an EventObject or a jQuery.Event when you use jQuery.

Default Value: null

onDropZoneLeave

A function that is executed when the mouse leaves a drop zone as it drags a file.

Type:

Function parameters:

e:

DropZoneLeaveEvent

Information about the event.

Object structure:

Name	Type	Description
component	FileUploader	The UI component's instance.
dropZoneElement	HTMLElement \| jQuery	A drop zone element.
element	HTMLElement \| jQuery	The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.
event	Event (jQuery or EventObject)	The event that caused the function to execute. It is an EventObject or a jQuery.Event when you use jQuery.

Default Value: null

onFilesUploaded

A function that is executed when the file upload process is complete.

Type:

Function parameters:

e:

FilesUploadedEvent

Information about the event.

Object structure:

Name

Type

Description

component

The UI component's instance.

element

The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.

Default Value: null

jQuery

JavaScript

$(function() {
    $("#fileUploaderContainer").dxFileUploader({
        // ...
        onFilesUploaded: function(e) {
            // Your code goes here
        }
    });
});

Angular

app.component.html

app.component.ts

app.module.ts

<dx-file-uploader 
    (onFilesUploaded)="onFilesUploaded($event)">
    <!-- ... -->
</dx-file-uploader>

import { Component } from '@angular/core';

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})

export class AppComponent {
    onFilesUploaded(e){
        // ...
    }
}

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { DxFileUploaderModule } from 'devextreme-angular';

@NgModule({
    imports: [
        DxFileUploaderModule
    ],        
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxFileUploader 
        :on-files-uploaded="onFilesUploaded" >            
    </DxFileUploader>
</template>

<script>
    import 'devextreme/dist/css/dx.light.css';

    import { 
        DxFileUploader
        // ... 
    } from 'devextreme-vue/file-uploader';

    export default {
        components: { 
            DxFileUploader
            // ... 
        },
        methods: {
            onFilesUploaded(e) {
                // ...
            }
        },         
        data() {
            return {
                //...
            };
        } 
    };
</script>

React

App.js

import React from 'react';
import FileUploader from 'devextreme-react/file-uploader';

const App = () => {
    const onFilesUploaded = (e) => {
        // ...
    };

    return (
        <FileUploader onFilesUploaded={onFilesUploaded}>
            <!-- ... -->               
        </FileUploader>
    );
};

export default App;

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().FileUploader()
    .OnFilesUploaded("onFilesUploaded");
    // ...
)

<script>
    function onFilesUploaded(e) {
        // ...
    }
</script>

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().FileUploader()
    .OnFilesUploaded("onFilesUploaded");
    // ...
)

<script>
    function onFilesUploaded(e) {
        // ...
    }
</script>

onInitialized

A function used in JavaScript frameworks to save the UI component instance.

Type:

Function parameters:

e:

InitializedEvent

Information about the event.

Object structure:

Name	Type	Description
element	HTMLElement \| jQuery	The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.
component	FileUploader	The UI component's instance.

Name

Type

Description

element

The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.

component

The UI component's instance.

Default Value: null

Angular

app.component.html

app.component.ts

<dx-file-uploader ...
    (onInitialized)="saveInstance($event)">
</dx-file-uploader>

import { Component } from "@angular/core";
import FileUploader from "devextreme/ui/data_grid";
// ...
export class AppComponent {
    fileUploaderInstance: FileUploader;
    saveInstance (e) {
        this.fileUploaderInstance = e.component;
    }
}

Vue

App.vue (Options API)

App.vue (Composition API)

<template>
    <div>
        <DxFileUploader ...
            @initialized="saveInstance">
        </DxFileUploader>
    </div>
</template>

<script>
import DxFileUploader from 'devextreme-vue/file-uploader';

export default {
    components: {
        DxFileUploader
    },
    data: function() {
        return {
            fileUploaderInstance: null
        };
    },
    methods: {
        saveInstance: function(e) {
            this.fileUploaderInstance = e.component;
        }
    }
};
</script>

<template>
    <div>
        <DxFileUploader ...
            @initialized="saveInstance">
        </DxFileUploader>
    </div>
</template>

<script setup>
import DxFileUploader from 'devextreme-vue/file-uploader';

let fileUploaderInstance = null;

const saveInstance = (e) => {
    fileUploaderInstance = e.component;
}
</script>

React

App.js

import FileUploader from 'devextreme-react/file-uploader';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.saveInstance = this.saveInstance.bind(this);
    }

    saveInstance(e) {
        this.fileUploaderInstance = e.component;
    }

    render() {
        return (
            <div>
                <FileUploader onInitialized={this.saveInstance} />
            </div>
        );
    }
}

jQuery

Get a UI component Instance in jQuery

Angular

Get a UI component Instance in Angular

Vue

Get a UI component Instance in Vue

React

Get a UI component Instance in React

onOptionChanged

A function that is executed after a UI component property is changed.

Type:

Function parameters:

e:

OptionChangedEvent

Information about the event.

Object structure:

Name	Type	Description
value	any	The modified property's new value.
previousValue	any	The UI component's previous value.
name	String	The modified property if it belongs to the first level. Otherwise, the first-level property it is nested into.
fullName	String	The path to the modified property that includes all parent properties.
element	HTMLElement \| jQuery	The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.
component	FileUploader	The UI component's instance.

Default Value: null

The following example shows how to subscribe to component property changes:

jQuery

index.js

$(function() {
    $("#fileUploaderContainer").dxFileUploader({
        // ...
        onOptionChanged: function(e) {
            if(e.name === "changedProperty") {
                // handle the property change here
            }
        }
    });
});

Angular

app.component.html

app.component.ts

app.module.ts

<dx-file-uploader ...
    (onOptionChanged)="handlePropertyChange($event)"> 
</dx-file-uploader>

import { Component } from '@angular/core'; 

@Component({ 
    selector: 'app-root', 
    templateUrl: './app.component.html', 
    styleUrls: ['./app.component.css'] 
}) 

export class AppComponent { 
    // ...
    handlePropertyChange(e) {
        if(e.name === "changedProperty") { 
            // handle the property change here
        }
    }
}

import { BrowserModule } from '@angular/platform-browser'; 
import { NgModule } from '@angular/core'; 
import { AppComponent } from './app.component'; 
import { DxFileUploaderModule } from 'devextreme-angular'; 

@NgModule({ 
    declarations: [ 
        AppComponent 
    ], 
    imports: [ 
        BrowserModule, 
        DxFileUploaderModule 
    ], 
    providers: [ ], 
    bootstrap: [AppComponent] 
}) 

export class AppModule { }

Vue

App.vue

<template> 
    <DxFileUploader ...
        @option-changed="handlePropertyChange"
    />            
</template> 

<script>  
import 'devextreme/dist/css/dx.light.css'; 
import DxFileUploader from 'devextreme-vue/file-uploader'; 

export default { 
    components: { 
        DxFileUploader
    }, 
    // ...
    methods: { 
        handlePropertyChange: function(e) {
            if(e.name === "changedProperty") {
                // handle the property change here
            }
        }
    } 
} 
</script>

React

App.js

import React from 'react';  
import 'devextreme/dist/css/dx.light.css'; 

import FileUploader from 'devextreme-react/file-uploader'; 

const handlePropertyChange = (e) => {
    if(e.name === "changedProperty") {
        // handle the property change here
    }
}

export default function App() { 
    return ( 
        <FileUploader ...
            onOptionChanged={handlePropertyChange}
        />        
    ); 
}

onProgress

A function that is executed when a file segment is uploaded.

Type:

Function parameters:

e:

ProgressEvent

Information about the event.

Object structure:

Name	Type	Description
bytesLoaded	Number	The total count of the uploaded bytes.
bytesTotal	Number	The total count of bytes in the XMLHttpRequest.
component	FileUploader	The UI component's instance.
element	HTMLElement \| jQuery	The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.
event	Event (jQuery or EventObject)	The event that caused the function to execute. It is an EventObject or a jQuery.Event when you use jQuery.
file	File	An uploaded file.
request	XMLHttpRequest Object	An XMLHttpRequest for the file.
segmentSize	Number	The size of the uploaded file segment.

Default Value: null

Note that the onProgress function is not in effect if you use FileUploader in useForm upload mode or call the form.submit method.

onUploadAborted

A function that is executed when the file upload is aborted.

Type:

Function parameters:

e:

UploadAbortedEvent

Information about the event.

Object structure:

Name	Type	Description
component	FileUploader	The UI component's instance.
element	HTMLElement \| jQuery	The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.
event	Event (jQuery or EventObject)	The event that caused the function to execute. It is an EventObject or a jQuery.Event when you use jQuery.
file	File	The uploaded file.
message	String	The message displayed by the UI component when the file upload is cancelled.
request	XMLHttpRequest Object	Specifies an XMLHttpRequest for the file.

Default Value: null

onUploaded

A function that is executed when a file is successfully uploaded.

Type:

Function parameters:

e:

UploadedEvent

Information about the event.

Object structure:

Name	Type	Description
component	FileUploader	The UI component's instance.
element	HTMLElement \| jQuery	The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.
event	Event (jQuery or EventObject)	The event that caused the function to execute. It is an EventObject or a jQuery.Event when you use jQuery.
file	File	The uploaded file.
message	String	The message displayed by the UI component when uploading is finished.
request	XMLHttpRequest Object	Specifies an XMLHttpRequest for the file.

Default Value: null

Note that the onUploaded function is not in effect if you use FileUploader in useForm upload mode or call the form.submit method.

onUploadError

A function that is executed when an error occurs during the file upload.

Type:

Function parameters:

e:

UploadErrorEvent

Information about the event.

Object structure:

Name	Type	Description
component	FileUploader	The UI component's instance.
element	HTMLElement \| jQuery	The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.
error	any	The error that occurred.
event	Event (jQuery or EventObject)	The event that caused the function to execute. It is an EventObject or a jQuery.Event when you use jQuery.
file	File	The uploaded file.
message	String	The message displayed by the UI component on uploading failure.
request	XMLHttpRequest Object	Specifies an XMLHttpRequest for the file.

Default Value: null

The following code shows how you can handle a network error.

jQuery

JavaScript

$(function(){
    $("#fileUploader").dxFileUploader({
        // ...
        onUploadError: function(e){
            var xhttp = e.request;
            if (xhttp.readyState == 4 && xhttp.status == 0) {
                console.log("Connection refused.");
            }
        }
    });
});

Angular

app.component.html

app.component.ts

app.module.ts

<dx-file-uploader 
    (onUploadError)="onUploadError($event)">
    <!-- ... -->
</dx-file-uploader>

import { Component } from '@angular/core';

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})

export class AppComponent {
    onUploadError(e){
        var xhttp = e.request;
        if (xhttp.readyState == 4 && xhttp.status == 0) {
            console.log("Connection refused.");
        } 
    }
}

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { DxFileUploaderModule } from 'devextreme-angular';

@NgModule({
    imports: [
        DxFileUploaderModule
    ],        
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxFileUploader 
        :on-upload-error="onUploadError" >            
    </DxFileUploader>
</template>

<script>
    import 'devextreme/dist/css/dx.light.css';

    import { 
        DxFileUploader
        // ... 
    } from 'devextreme-vue/file-uploader';

    export default {
        components: { 
            DxFileUploader
            // ... 
        },
        methods: {
            onUploadError(e) {
                var xhttp = e.request;
                if (xhttp.readyState == 4 && xhttp.status == 0) {
                    console.log("Connection refused.");
                } 
            }
        },         
        data() {
            return {
                //...
            };
        } 
    };
</script>

React

App.js

import React from 'react';
import FileUploader from 'devextreme-react/file-uploader';

const App = () => {
    const onUploadError = (e) => {
        var xhttp = e.request;
        if (xhttp.readyState == 4 && xhttp.status == 0) {
            console.log("Connection refused.");
        } 
    };

    return (
        <FileUploader onUploadError={onUploadError}>
            <!-- ... -->               
        </FileUploader>
    );
};

export default App;

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().FileUploader()
    .OnUploadError("onUploadError");
    // ...
)

<script>
    function onUploadError(e) {
        var xhttp = e.request;
        if (xhttp.readyState == 4 && xhttp.status == 0) {
            console.log("Connection refused.");
        } 
    }
</script>

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().FileUploader()
    .OnUploadError("onUploadError");
    // ...
)

<script>
    function onUploadError(e) {
        var xhttp = e.request;
        if (xhttp.readyState == 4 && xhttp.status == 0) {
            console.log("Connection refused.");
        } 
    }
</script>

onUploadStarted

A function that is executed when the file upload is started.

Type:

Function parameters:

e:

UploadStartedEvent

Information about the event.

Object structure:

Name	Type	Description
component	FileUploader	The UI component's instance.
element	HTMLElement \| jQuery	The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.
event	Event (jQuery or EventObject)	The event that caused the function to execute. It is an EventObject or a jQuery.Event when you use jQuery.
file	File	The uploaded file.
request	XMLHttpRequest Object	Specifies an XMLHttpRequest for the file.

Default Value: null

Note that the onUploadStarted function is not in effect if you use FileUploader in useForm upload mode or call the form.submit method.

onValueChanged

A function that is executed when one or several files are added to or removed from the selection.

Type:

Function parameters:

e:

ValueChangedEvent

Information about the event.

Object structure:

Name	Type	Description
value	Array<File>	Newly selected files.
previousValue	Array<File>	Previously selected files.
event	Event (jQuery or EventObject)	The event that caused the function to execute. It is an EventObject or a jQuery.Event when you use jQuery. This field is undefined if the value is changed programmatically.
element	HTMLElement \| jQuery	The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.
component	FileUploader	The UI component's instance.

Default Value: null

progress

Gets the current progress in percentages.

Type:

Default Value: 0

readOnly

Specifies whether the editor is read-only.

Type:

Default Value: false

Set the readOnly property to true to enable the following functionality:

File upload in UI is disabled. This also includes a HTML element specified in the dialogTrigger property.
Built-in action buttons are disabled.

Note that already selected files are available for upload in readOnly mode.

readyToUploadMessage

The message displayed by the UI component when it is ready to upload the specified files.

Type:

Default Value: 'Ready to upload'

This property makes sense only if the uploadMode property is set to "useButtons".

rtlEnabled

Switches the UI component to a right-to-left representation.

Type:

DataGrid Demo Navigation UI Demo Editors Demo

Default Value: false

When this property is set to true, the UI component text flows from right to left, and the layout of elements is reversed. To switch the entire application/site to the right-to-left representation, assign true to the rtlEnabled field of the object passed to the DevExpress.config(config) method.

JavaScript

DevExpress.config({
    rtlEnabled: true
});

selectButtonText

The text displayed on the button that opens the file browser.

Type:

Default Value: 'Select File'

showFileList

Specifies whether or not the UI component displays the list of selected files.

Type:

Default Value: true

tabIndex

Specifies the number of the element when the Tab key is used for navigating.

Type:

Default Value: 0

The value of this property will be passed to the tabindex attribute of the HTML element that underlies the UI component.

uploadAbortedMessage

The message displayed by the UI component when the file upload is cancelled.

Type:

Default Value: 'Upload cancelled'

This property is only available if the uploadMode property is set to "instantly".

uploadButtonText

The text displayed on the button that starts uploading.

Type:

Default Value: 'Upload'

The property makes sense only if the uploadMode property is set to "useButtons" or "instantly".

uploadChunk

A function that uploads a file in chunks.

Type:

Function parameters:

file:

File

The file that is uploaded.

uploadInfo:

UploadInfo

Information about the file upload session.

Return Value:

Promise<any> (jQuery or native)

| any

A Promise that is resolved after the chunk is uploaded. It is a native Promise or a jQuery.Promise when you use jQuery.

jQuery

index.js

$(function() {
    $("#file-uploader").dxFileUploader({
        uploadChunk: function(file, uploadInfo) {
            // your code
        }
    });      
});

Angular

app.component.html

app.component.ts

app.module.ts

<dx-file-uploader ...
    [uploadChunk]="fileUploader_uploadChunk">
</dx-file-uploader>

import { Component } from '@angular/core';

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})
export class AppComponent {
    // Uncomment the following lines if the function should be executed in the component's context
    // constructor() {
    //     this.fileUploader_uploadChunk = this.fileUploader_uploadChunk.bind(this);
    // }

    fileUploader_uploadChunk(file, uploadInfo) {
        // ...
    }
}

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxFileUploaderModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxFileUploaderModule
    ],
    providers: [],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxFileUploader ...
        :upload-chunk="fileUploader_uploadChunk"
    />
</template>

<script>
import 'devextreme/dist/css/dx.light.css';

import DxFileUploader from 'devextreme-vue/file-uploader';

export default {
    components: {
        DxFileUploader
    },
    methods: {
        fileUploader_uploadChunk(file, uploadInfo) {
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import FileUploader from 'devextreme-react/file-uploader';

class App extends React.Component {
    // Uncomment the following lines if the function should be executed in the component's context
    // constructor(props) {
    //     super(props);
    //     this.fileUploader_uploadChunk = this.fileUploader_uploadChunk.bind(this);
    // }

    fileUploader_uploadChunk(file, uploadInfo) {
        // ...
    }

    render() {
        return (
            <FileUploader ...
                uploadChunk={this.fileUploader_uploadChunk}
            />
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().FileUploader()
    @* ... *@
    .UploadChunk("uploadChunk")
)

<script type="text/javascript">
    function uploadChunk(file, uploadInfo) {
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().FileUploader()
    @* ... *@
    .UploadChunk("uploadChunk")
)

<script type="text/javascript">
    function uploadChunk(file, uploadInfo) {
        // ...
    }
</script>

uploadCustomData

Specifies custom data for the upload request.

Type: any

Default Value: {}

jQuery

JavaScript

$(function() {
    $("#fileUploaderContainer").dxFileUploader({
        // ...
        uploadCustomData: {
            __RequestVerificationToken: document.getElementsByName("__RequestVerificationToken")[0].value
        }
    });
});

Angular

app.component.html

app.module.ts

<dx-file-uploader id="fileUploader">
    [uploadCustomData]="{
        __RequestVerificationToken: document.getElementsByName("__RequestVerificationToken")[0].value
    }"
    <!-- ... -->
</dx-file-uploader>

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { DxFileUploaderModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxFileUploaderModule
    ],
    //...
})
export class AppModule { }

Vue

App.vue

<template>
    <DxFileUploader
        :upload-custom-data="uploaderCustomData" >   
    </DxFileUploader>
</template>
<script>
    import 'devextreme/dist/css/dx.light.css';    

    import {
        DxFileUploader
    } from 'devextreme-vue/file-uploader';

    export default {
        components: {
            DxFileUploader
        },
        data() {
            return {
                uploaderCustomData: {
                    __RequestVerificationToken: document.getElementsByName("__RequestVerificationToken")[0].value
                }
            };
        }            
    };
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import FileUploader from 'devextreme-react/file-uploader';

const uploaderCustomData = {
    __RequestVerificationToken: document.getElementsByName("__RequestVerificationToken")[0].value
};

class App extends React.Component {
    render() {
        return (
            <FileUploader uploadCustomData={uploaderCustomData} >
            </FileUploader>
        );
    }
}
export default App;

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().FileUploader()
    .UploadCustomData(new JS("__RequestVerificationToken: document.getElementsByName('__RequestVerificationToken')[0].value"))
    // ...
)

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().FileUploader()
    .UploadCustomData(new JS("__RequestVerificationToken: document.getElementsByName('__RequestVerificationToken')[0].value"))
    // ...
)

uploadedMessage

The message displayed by the UI component when uploading is finished.

Type:

Default Value: 'Uploaded'

The property makes sense only if the uploadMode property is set to "useButtons" or "instantly".

uploadFailedMessage

The message displayed by the UI component on uploading failure.

Type:

Default Value: 'Upload failed'

The property makes sense only if the uploadMode property is set to "useButtons" or "instantly".

uploadFile

A function that uploads a file.

Type:

Event Handler Arguments:

file:

File

The file that is uploaded.

progressCallback:

A function that you should call to notify the UI component about the file upload progress.

Return Value:

Promise<any> (jQuery or native)

| any

A Promise that is resolved after the file is uploaded. It is a native Promise or a jQuery.Promise when you use jQuery.

Return Value:

Promise<any> (jQuery or native)

| any

A Promise that is resolved after the file is uploaded. It is a native Promise or a jQuery.Promise when you use jQuery.

jQuery

index.js

$(function() {
    $("#file-uploader").dxFileUploader({
        multiple: true,
        uploadFile: function(file, progressCallback) {
            // your code
            progressCallback(100);
            // ...
            progressCallback(200);
            // ...
        }
    });         
});

Angular

app.component.html

app.component.ts

app.module.ts

<dx-file-uploader ...
    [uploadFile]="fileUploader_uploadFile">
</dx-file-uploader>

import { Component } from '@angular/core';

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})
export class AppComponent {
    // Uncomment the following lines if the function should be executed in the component's context
    // constructor() {
    //     this.fileUploader_uploadFile = this.fileUploader_uploadFile.bind(this);
    // }

    fileUploader_uploadFile(file, progressCallback) {
        // your code
        progressCallback(100);
        // ...
        progressCallback(200);
        // ...
    }
}

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxFileUploaderModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxFileUploaderModule
    ],
    providers: [],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxFileUploader ...
        :upload-file="fileUploader_uploadFile"
    />
</template>

<script>
import 'devextreme/dist/css/dx.light.css';

import DxFileUploader from 'devextreme-vue/file-uploader';

export default {
    components: {
        DxFileUploader
    },
    methods: {
        fileUploader_uploadFile(file, progressCallback) {
            // your code
            progressCallback(100);
            // ...
            progressCallback(200);
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import FileUploader from 'devextreme-react/file-uploader';

class App extends React.Component {
    // Uncomment the following lines if the function should be executed in the component's context
    // constructor(props) {
    //     super(props);
    //     this.fileUploader_uploadFile = this.fileUploader_uploadFile.bind(this);
    // }

    fileUploader_uploadFile(file, progressCallback) {
        // your code
        progressCallback(100);
        // ...
        progressCallback(200);
        // ...
    }

    render() {
        return (
            <FileUploader ...
                uploadFile={this.fileUploader_uploadFile}
            />
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().FileUploader()
    @* ... *@
    .UploadFile("uploadFile")
)

<script type="text/javascript">
    function uploadFile(file, progressCallback) {
        // your code
        progressCallback(100);
        // ...
        progressCallback(200);
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().FileUploader()
    @* ... *@
    .UploadFile("uploadFile")
)

<script type="text/javascript">
    function uploadFile(file, progressCallback) {
        // your code
        progressCallback(100);
        // ...
        progressCallback(200);
        // ...
    }
</script>

uploadHeaders

Specifies headers for the upload request.

Type: any

Default Value: {}

uploadMethod

Specifies the method for the upload request.

Type:

UploadHttpMethod

Default Value: 'POST'

The property makes sense only if the uploadMode property is set to "useButtons" or "instantly".

uploadMode

Specifies how the UI component uploads files.

Type:

FileUploadMode

Default Value: 'instantly'

Depending on the uploadMode, the FileUploader UI component uses an HTML form or a FormData interface with a series of Ajax requests to upload files. The uploadMode property accepts one of the following values:

"instantly" (default)
Ajax upload. Files are uploaded after they are selected.
"useButtons"
Ajax upload. Files are uploaded after a user clicks the Upload button.
"useForm"
HTML form upload. Files are uploaded when the HTML form is submitted.

uploadUrl

Specifies a target Url for the upload request.

Type:

Default Value: '/'

The property makes sense only if the uploadMode property is set to "useButtons" or "instantly".

validationError

Information on the broken validation rule. Contains the first item from the validationErrors array.

Type: any

Default Value: null

validationErrors

An array of the validation rules that failed.

Type:

Array<any>

Default Value: null

validationStatus

Indicates or specifies the current validation status.

Type:

ValidationStatus

Default Value: 'valid'

The following table illustrates the validation status indicators:

validationStatus	Indicator
`"pending"`
`"valid"`
`"invalid"`

When you assign "invalid" to validationStatus, you can also use the validationErrors array to set an error message as shown below:

jQuery

index.js

$(function() {
    const fileUploader = $("#fileUploaderContainer").dxFileUploader({
        // ...
    }).dxFileUploader("instance");

    function setInvalidStatus(message) {
        fileUploader.option({
            validationStatus: "invalid",
            validationErrors: [{ message: message }]
        });
    }
});

Angular

app.component.html

app.component.ts

<dx-file-uploader
    [validationStatus]="validationStatus"
    [validationErrors]="validationErrors">
</dx-file-uploader>

// ...
export class AppComponent {
    validationStatus: string = "valid";
    validationErrors: any;
    // ...
    setInvalidStatus(message) {
        this.validationStatus = "invalid";
        this.validationErrors = [{ message: message }];
    }
}

Vue

App.vue

<template>
    <DxFileUploader ...
        :validation-status="validationStatus"
        :validation-errors="validationErrors"
    />
</template>

<script>
    // ...
    export default {
        // ...
        data() {
            return {
                validationStatus: "valid",
                validationErrors: []
            }
        },
        methods: {
            setInvalidStatus(message) {
                this.validationStatus = "invalid";
                this.validationErrors = [{ message: message }];
            }
        }
    }
</script>

React

App.js

import React, { useState } from 'react';
// ...

function App() {
    const [validationStatus, setValidationStatus] = useState("valid");
    const [validationErrors, setValidationErrors] = useState([]);

    const setInvalidStatus = message => {
        setValidationStatus("invalid");
        setValidationErrors([{ message: message }]);
    }

    return (
        <FileUploader
            validationStatus={validationStatus}
            validationErrors={validationErrors}
        />
    ); 

};
export default App;

value

Specifies a File instance representing the selected file. Read-only when uploadMode is "useForm".

Type:

Array<File>

Default Value: []

Raised Events: onValueChanged

visible

Specifies whether the UI component is visible.

Type: