JavaScript/jQuery FileUploader Options

Function parameters:

file:

File

The file that is uploaded.

uploadInfo:

Information about the file upload session.

Object structure:

Name	Type	Description
bytesUploaded	Number	The count of bytes that is already uploaded to the server.
chunkBlob	BLOB	The binary content of the chunk that is uploaded.
chunkCount	Number	The number of all chunks.
chunkIndex	Number	The index of the chunk that is uploaded.
customData	Object	Any custom information that is saved during upload.

Return Value:

Promise<any> (jQuery or native)

| any

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

jQuery

index.js

$(function() {
    $("#file-uploader").dxFileUploader({
        multiple: true,
        chunkSize: 200000,
        abortUpload: function(file, uploadInfo) {
            // your code
        }
    });      
});

accept

Specifies a file type or several types accepted by the widget.

Type:

Default Value: ''

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

accessKey

Specifies the shortcut key that sets focus on the widget.

Type:

Default Value: null

The value of this option will be passed to the accesskey attribute of the HTML element that underlies the widget.

activeStateEnabled

Specifies whether or not the widget changes its state when interacting with a user.

Type:

Default Value: false

This option is used when the widget is displayed on a platform whose guidelines include the active state change for widgets.

allowCanceling

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

Type:

Default Value: true

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

NOTE

This option 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: []

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 option to a positive value to enable chunk upload. The widget 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
}

disabled

Specifies whether the widget responds to user interaction.

Type:

Default Value: false

elementAttr

Specifies the attributes to be attached to the widget's root element.

Type:

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 widget can be focused using keyboard navigation.

Type:

Default Value: true (desktop)

height

Specifies the widget's height.

Type:

|

|

Return Value:

|

The widget's height.

Default Value: undefined

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

Number
The height in pixels.
String
A CSS-accepted measurement of height. For example, "55px", "80%", "inherit".
Function
A function returning either of the above. For example:
JavaScript
```
height: function() {
    return window.innerHeight / 1.5;
}
```

hint

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

Type:

Default Value: undefined

hoverStateEnabled

Specifies whether the widget changes its state when a user pauses on it.

Type:

Default Value: false

inputAttr

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

Type:

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
    ],
    // ...
})

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'

isValid

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

Type:

Default Value: true

The FileUploader provides alternative validation options: 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'

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

onContentReady

A function that is executed when the widget's content is ready and each time the content is changed.

Type:

Function parameters:

e:

Information about the event.

Object structure:

Name

Type

Description

component

FileUploader

The widget's instance.

element

HTMLElement | jQuery

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

model

Model data. Available only when using Knockout.

Default Value: null

onDisposing

A function that is executed before the widget is disposed of.

Type:

Function parameters:

e:

Information about the event.

Object structure:

Name

Type

Description

component

FileUploader

The widget's instance.

element

HTMLElement | jQuery

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

model

Model data. Available only if you use Knockout.

Default Value: null

onInitialized

A function used in JavaScript frameworks to save the widget instance.

Type:

Function parameters:

e:

Information about the event.

Object structure:

Name

Type

Description

component

FileUploader

The widget's instance.

element

HTMLElement | jQuery

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

Default Value: null

onOptionChanged

A function that is executed after a widget option is changed.

Type:

Function parameters:

e:

Information about the event.

Object structure:

Name	Type	Description
model	Object	Model data. Available only if you use Knockout.
fullName	String	The path to the modified option that includes all parent options.
element	HTMLElement \| jQuery	The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.
component	FileUploader	The widget's instance.
name	String	The modified option if it belongs to the first level. Otherwise, the first-level option it is nested into.
value	any	The modified option's new value.

Default Value: null

onProgress

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

Type:

Function parameters:

e:

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 widget's instance.
element	HTMLElement \| jQuery	The widget'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 a dxEvent or a jQuery.Event when you use jQuery.
file	File	An uploaded file.
jQueryEvent	jQuery.Event	Use 'event' instead. The jQuery event that caused the handler execution. Deprecated in favor of the event field.
model	Object	Model data. Available only if Knockout is used.
request	XMLHttpRequest Object	An XMLHttpRequest for the file.
segmentSize	Number	The size of the uploaded file segment.

Default Value: null

onUploadAborted

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

Type:

Function parameters:

e:

Information about the event.

Object structure:

Name	Type	Description
component	FileUploader	The widget's instance.
element	HTMLElement \| jQuery	The widget'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 a dxEvent or a jQuery.Event when you use jQuery.
file	File	The uploaded file.
jQueryEvent	jQuery.Event	Use 'event' instead. The jQuery event that caused the handler execution. Deprecated in favor of the event field.
model	Object	Model data. Available only if Knockout is used.
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:

Information about the event.

Object structure:

Name	Type	Description
component	FileUploader	The widget's instance.
element	HTMLElement \| jQuery	The widget'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 a dxEvent or a jQuery.Event when you use jQuery.
file	File	The uploaded file.
jQueryEvent	jQuery.Event	Use 'event' instead. The jQuery event that caused the handler execution. Deprecated in favor of the event field.
model	Object	Model data. Available only if Knockout is used.
request	XMLHttpRequest Object	Specifies an XMLHttpRequest for the file.

Default Value: null

onUploadError

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

Type:

Function parameters:

e:

Information about the event.

Object structure:

Name	Type	Description
component	FileUploader	The widget's instance.
element	HTMLElement \| jQuery	The widget'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 a dxEvent or a jQuery.Event when you use jQuery.
file	File	The uploaded file.
jQueryEvent	jQuery.Event	Use 'event' instead. The jQuery event that caused the handler execution. Deprecated in favor of the event field.
model	Object	Model data. Available only if Knockout is used.
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

TypeScript

HTML

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

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

onUploadStarted

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

Type:

Function parameters:

e:

Information about the event.

Object structure:

Name	Type	Description
component	FileUploader	The widget's instance.
element	HTMLElement \| jQuery	The widget'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 a dxEvent or a jQuery.Event when you use jQuery.
file	File	The uploaded file.
jQueryEvent	jQuery.Event	Use 'event' instead. The jQuery event that caused the handler execution. Deprecated in favor of the event field.
model	Object	Model data. Available only if Knockout is used.
request	XMLHttpRequest Object	Specifies an XMLHttpRequest for the file.

Default Value: null

onValueChanged

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

Type:

Function parameters:

e:

Information about the event.

Object structure:

Name	Type	Description
value	Array<File>	Newly selected files.
previousValue	Array<File>	Previously selected files.
model	Object	Model data. Available only if Knockout is used.
jQueryEvent	jQuery.Event	Use 'event' instead. The jQuery event that caused the handler execution. Deprecated in favor of the event field.
event	Event (jQuery or EventObject)	The event that caused the function to execute. It is a dxEvent or a jQuery.Event when you use jQuery. This field is undefined if the value is changed programmatically.
element	HTMLElement \| jQuery	The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.
component	FileUploader	The widget'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

readyToUploadMessage

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

Type:

Default Value: 'Ready to upload'

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

rtlEnabled

Switches the widget to a right-to-left representation.

Type:

Default Value: false

When this option is set to true, the widget 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 widget 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 option will be passed to the tabindex attribute of the HTML element that underlies the widget.

uploadButtonText

The text displayed on the button that starts uploading.

Type:

Default Value: 'Upload'

The option makes sense only if the uploadMode option 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:

Information about the file upload session.

Object structure:

Name	Type	Description
bytesUploaded	Number	The count of bytes that is already uploaded to the server.
chunkBlob	BLOB	The binary content of the chunk that is uploaded.
chunkCount	Number	The number of all chunks.
chunkIndex	Number	The index of the chunk that is uploaded.
customData	Object	Any custom information that is saved during the upload.

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({
        multiple: true,
        chunkSize: 200000,
        uploadChunk: function(file, uploadInfo) {
            // your code
        }
    });      
});

uploadedMessage

The message displayed by the widget when uploading is finished.

Type:

Default Value: 'Uploaded'

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

uploadFailedMessage

The message displayed by the widget on uploading failure.

Type:

Default Value: 'Upload failed'

The option makes sense only if the uploadMode option 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 widget 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);
            // ...
        }
    });         
});

uploadHeaders

Specifies headers for the upload request.

Type:

Default Value: {}

uploadMethod

Specifies the method for the upload request.

Type:

Default Value: 'POST'

Accepted Values: 'POST' | 'PUT'

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

Use the UploadHttpMethod enum to specify this option when the widget is used as an ASP.NET MVC 5 Control or a DevExtreme-Based ASP.NET Core Control. This enum accepts the following values: POST and PUT.

uploadMode

Specifies how the widget uploads files.

Type:

Default Value: 'instantly'

Accepted Values: 'instantly' | 'useButtons' | 'useForm'

Depending on the uploadMode, the FileUploader widget uses an HTML form or a FormData interface with a series of Ajax requests to upload files. The uploadMode option 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.

Use the FileUploadMode enum to specify this option when the widget is used as an ASP.NET MVC 5 Control or a DevExtreme-Based ASP.NET Core Control. This enum accepts the following values: Instantly, UseButtons, and UseForm.

uploadUrl

Specifies a target Url for the upload request.

Type:

Default Value: '/'

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

validationError

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

Type:

Default Value: null

validationErrors

An array of the validation rules that failed.

Type:

Array<Object>

Default Value: null

validationStatus

Indicates or specifies the current validation status.

Type:

Default Value: 'valid'

Accepted Values: 'valid' | 'invalid' | 'pending'

The following table illustrates the validation status indicators:

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

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 widget is visible.

Type: