React FileManager - Custom.Configuration

This section describes properties that configure a custom file system provider.

abortFileUpload

A function that cancels the file upload.

Type:

Function

Function parameters:
file:

File

The file that is being uploaded.

uploadInfo:

UploadInfo

Information about the file upload session.

destinationDirectory:

FileSystemItem

The directory where a file system item is uploaded to.

Return Value:

Promise<any> (jQuery or native)

| any

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

jQuery
JavaScript
$(function () {
    $("#file-manager").dxFileManager({ 
        fileSystemProvider: new DevExpress.fileManagement.CustomFileSystemProvider({             
            abortFileUpload: function(fileData, chunksInfo, destinationDir) { 
                // Your code goes here
            },
            //...
        }) 
    });     
});
Angular
app.component.html
app.component.ts
app.module.ts
<dx-file-manager 
    [fileSystemProvider]="fileSystemProvider">
</dx-file-manager>
import { Component } from '@angular/core';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider'; 

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

export class AppComponent {
    fileSystemProvider: CustomFileSystemProvider;
    constructor(http: HttpClient) {
        this.fileSystemProvider = new CustomFileSystemProvider({
            abortFileUpload,
            // ...
        });
    }
}

function abortFileUpload(fileData, chunksInfo, destinationDir) {
    // ...
}
// other functions
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { DxFileManagerModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxFileManagerModule
    ],
    //...
})
export class AppModule { }
Vue
App.vue
<template>
    <DxFileManager
        :file-system-provider="fileSystemProvider">
    </DxFileManager>
</template>

<script>
import 'devextreme/dist/css/dx.light.css'; 
import { DxFileManager } from 'devextreme-vue/file-manager';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider';

export default {
    components: {
        DxFileManager
    },

    data() {
        return {
            fileSystemProvider: new CustomFileSystemProvider({
                abortFileUpload,
                // ...
            }),
        };
    }
};

function abortFileUpload(fileData, chunksInfo, destinationDir) {
    // ...
}
// other functions

</script>
React
App.js
import React from 'react';
import 'devextreme/dist/css/dx.light.css';
import FileManager from 'devextreme-react/file-manager';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider';

class App extends React.Component {
    render() {
        constructor() {
            super();
            this.fileSystemProvider = new CustomFileSystemProvider({
                abortFileUpload,
                // ...
            });
        }
        return (
            <FileManager 
                fileSystemProvider={fileSystemProvider}>
            </FileManager>
        );
    }
}
function abortFileUpload(fileData, chunksInfo, destinationDir) {
    // ...
}
// other functions

export default App;
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().FileManager()
    .FileSystemProvider(provider => provider.Custom()
        .AbortFileUpload("abortFileUpload")
        // ...
    )    
)

<script>
    function abortfileUpload(fileData, chunksInfo, destinationDir) {
        // ...
    }
    // other functions
</script>
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().FileManager()
    .FileSystemProvider(provider => provider.Custom()
        .AbortFileUpload("abortFileUpload")
        // ...
    )    
)

<script>
    function abortfileUpload(fileData, chunksInfo, destinationDir) {
        // ...
    }
    // other functions
</script>

copyItem

A function that copies files or folders.

Type:

Function

Function parameters:
item:

FileSystemItem

The current file system item.

destinationDirectory:

FileSystemItem

The directory where a file system item is copied to.

Return Value:

Promise<any> (jQuery or native)

| any

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

jQuery
JavaScript
$(function () {
    $("#file-manager").dxFileManager({ 
        fileSystemProvider: new DevExpress.fileManagement.CustomFileSystemProvider({ 
            copyItem: function(item, destinationDir) { 
                // Your code goes here
            }
            //...
        }) 
    });     
});
Angular
app.component.html
app.component.ts
app.module.ts
<dx-file-manager 
    [fileSystemProvider]="fileSystemProvider">
</dx-file-manager>
import { Component } from '@angular/core';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider'; 

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

export class AppComponent {
    fileSystemProvider: CustomFileSystemProvider;
    constructor(http: HttpClient) {
        this.fileSystemProvider = new CustomFileSystemProvider({
            copyItem,
            // ...
        });
    }
}

function copyItem(item, destinationDir) {
    // ...
}
// other functions
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { DxFileManagerModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxFileManagerModule
    ],
    //...
})
export class AppModule { }
Vue
App.vue
<template>
    <DxFileManager
        :file-system-provider="fileSystemProvider">
    </DxFileManager>
</template>

<script>
import 'devextreme/dist/css/dx.light.css'; 
import { DxFileManager } from 'devextreme-vue/file-manager';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider';

export default {
    components: {
        DxFileManager
    },

    data() {
        return {
            fileSystemProvider: new CustomFileSystemProvider({
                copyItem,
                // ...
            }),
        };
    }
};

function copyItem(item, destinationDir) {
    // ...
}
// other functions

</script>
React
App.js
import React from 'react';
import 'devextreme/dist/css/dx.light.css';
import FileManager from 'devextreme-react/file-manager';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider';

class App extends React.Component {
    render() {
        constructor() {
            super();
            this.fileSystemProvider = new CustomFileSystemProvider({
                copyItem,
                // ...
            });
        }
        return (
            <FileManager 
                fileSystemProvider={fileSystemProvider}>
            </FileManager>
        );
    }
}
function copyItem(item, destinationDir) {
    // ...
}
// other functions

export default App;
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().FileManager()
    .FileSystemProvider(provider => provider.Custom()
        .CopyItem("copyItem")
        // ...
    )    
)

<script>
    function copyItem(item, destinationDir) {
        // ...
    }
    // other functions
</script>
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().FileManager()
    .FileSystemProvider(provider => provider.Custom()
        .CopyItem("copyItem")
        // ...
    )    
)

<script>
    function copyItem(item, destinationDir) {
        // ...
    }
    // other functions
</script>

createDirectory

A function that creates a directory.

Type:

Function

Function parameters:
parentDirectory:

FileSystemItem

The parent directory where a new directory should be created.

name:

String

The name of the new directory.

Return Value:

Promise<any> (jQuery or native)

| any

A Promise that is resolved after a new directory is created. It is a native Promise or a jQuery.Promise when you use jQuery.

jQuery
JavaScript
$(function () {
    $("#file-manager").dxFileManager({ 
        fileSystemProvider: new DevExpress.fileManagement.CustomFileSystemProvider({ 
            createDirectory: function(parentDir, name) { 
                // Your code goes here
            }
            //...
        }) 
    });     
});
Angular
app.component.html
app.component.ts
app.module.ts
<dx-file-manager 
    [fileSystemProvider]="fileSystemProvider">
</dx-file-manager>
import { Component } from '@angular/core';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider'; 

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

export class AppComponent {
    fileSystemProvider: CustomFileSystemProvider;
    constructor(http: HttpClient) {
        this.fileSystemProvider = new CustomFileSystemProvider({
            createDirectory,
            // ...
        });
    }
}

function createDirectory(parentDir, name) {
    // ...
}
// other functions
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { DxFileManagerModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxFileManagerModule
    ],
    //...
})
export class AppModule { }
Vue
App.vue
<template>
    <DxFileManager
        :file-system-provider="fileSystemProvider">
    </DxFileManager>
</template>

<script>
import 'devextreme/dist/css/dx.light.css'; 
import { DxFileManager } from 'devextreme-vue/file-manager';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider';

export default {
    components: {
        DxFileManager
    },

    data() {
        return {
            fileSystemProvider: new CustomFileSystemProvider({
                createDirectory,
                // ...
            }),
        };
    }
};

function createDirectory(parentDir, name) {
    // ...
}
// other functions

</script>
React
App.js
import React from 'react';
import 'devextreme/dist/css/dx.light.css';
import FileManager from 'devextreme-react/file-manager';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider';

class App extends React.Component {
    render() {
        constructor() {
            super();
            this.fileSystemProvider = new CustomFileSystemProvider({
                createDirectory,
                // ...
            });
        }
        return (
            <FileManager 
                fileSystemProvider={fileSystemProvider}>
            </FileManager>
        );
    }
}
function createDirectory(parentDir, name) {
    // ...
}
// other functions

export default App;
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().FileManager()
    .FileSystemProvider(provider => provider.Custom()
        .CreateDirectory("createDirectory")
        // ...
    )    
)

<script>
    function createDirectory(parentDir, name) {
        // ...
    }
    // other functions
</script>
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().FileManager()
    .FileSystemProvider(provider => provider.Custom()
        .CreateDirectory("createDirectory")
        // ...
    )    
)

<script>
    function createDirectory(parentDir, name) {
        // ...
    }
    // other functions
</script>

dateModifiedExpr

Specifies which data field provides timestamps that indicate when a file was last modified.

Type:

String

|

Function

deleteItem

A function that deletes a file or folder.

Type:

Function

Function parameters:
item:

FileSystemItem

The current file system item.

Return Value:

Promise<any> (jQuery or native)

| any

A Promise that is resolved after a file system item is deleted. It is a native Promise or a jQuery.Promise when you use jQuery.

jQuery
JavaScript
$(function () {
    $("#file-manager").dxFileManager({ 
        fileSystemProvider: new DevExpress.fileManagement.CustomFileSystemProvider({ 
            deleteItem: function(item) { 
                // Your code goes here
            }
            //...
        }) 
    });     
});
Angular
app.component.html
app.component.ts
app.module.ts
<dx-file-manager 
    [fileSystemProvider]="fileSystemProvider">
</dx-file-manager>
import { Component } from '@angular/core';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider'; 

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

export class AppComponent {
    fileSystemProvider: CustomFileSystemProvider;
    constructor(http: HttpClient) {
        this.fileSystemProvider = new CustomFileSystemProvider({
            deleteItem,
            // ...
        });
    }
}

function deleteItem(item) {
    // ...
}
// other functions
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { DxFileManagerModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxFileManagerModule
    ],
    //...
})
export class AppModule { }
Vue
App.vue
<template>
    <DxFileManager
        :file-system-provider="fileSystemProvider">
    </DxFileManager>
</template>

<script>
import 'devextreme/dist/css/dx.light.css'; 
import { DxFileManager } from 'devextreme-vue/file-manager';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider';

export default {
    components: {
        DxFileManager
    },

    data() {
        return {
            fileSystemProvider: new CustomFileSystemProvider({
                deleteItem,
                // ...
            }),
        };
    }
};

function deleteItem(item) {
    // ...
}
// other functions

</script>
React
App.js
import React from 'react';
import 'devextreme/dist/css/dx.light.css';
import FileManager from 'devextreme-react/file-manager';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider';

class App extends React.Component {
    render() {
        constructor() {
            super();
            this.fileSystemProvider = new CustomFileSystemProvider({
                deleteItem,
                // ...
            });
        }
        return (
            <FileManager 
                fileSystemProvider={fileSystemProvider}>
            </FileManager>
        );
    }
}
function deleteItem(item) {
    // ...
}
// other functions

export default App;
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().FileManager()
    .FileSystemProvider(provider => provider.Custom()
        .DeleteItem("deleteItem")
        // ...
    )    
)

<script>
    function deleteItem(item) {
        // ...
    }
    // other functions
</script>
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().FileManager()
    .FileSystemProvider(provider => provider.Custom()
        .DeleteItem("deleteItem")
        // ...
    )    
)

<script>
    function deleteItem(item) {
        // ...
    }
    // other functions
</script>

downloadItems

A function that downloads files.

Type:

Function

Function parameters:
items:

Array<FileSystemItem>

The file system items.

jQuery
JavaScript
$(function () {
    $("#file-manager").dxFileManager({ 
        fileSystemProvider: new DevExpress.fileManagement.CustomFileSystemProvider({ 
            downloadItems: function(Array<FileManagerItem>) { 
                // Your code goes here
            }
            //...
        }) 
    });     
});
Angular
app.component.html
app.component.ts
app.module.ts
<dx-file-manager 
    [fileSystemProvider]="fileSystemProvider">
</dx-file-manager>
import { Component } from '@angular/core';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider'; 

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

export class AppComponent {
    fileSystemProvider: CustomFileSystemProvider;
    constructor(http: HttpClient) {
        this.fileSystemProvider = new CustomFileSystemProvider({
            downloadItems,
            // ...
        });
    }
}

function downloadItems(Array<FileManagerItem>) {
    // ...
}
// other functions
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { DxFileManagerModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxFileManagerModule
    ],
    //...
})
export class AppModule { }
Vue
App.vue
<template>
    <DxFileManager
        :file-system-provider="fileSystemProvider">
    </DxFileManager>
</template>

<script>
import 'devextreme/dist/css/dx.light.css'; 
import { DxFileManager } from 'devextreme-vue/file-manager';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider';

export default {
    components: {
        DxFileManager
    },

    data() {
        return {
            fileSystemProvider: new CustomFileSystemProvider({
                downloadItems,
                // ...
            }),
        };
    }
};

function downloadItems(Array<FileManagerItem>) {
    // ...
}
// other functions

</script>
React
App.js
import React from 'react';
import 'devextreme/dist/css/dx.light.css';
import FileManager from 'devextreme-react/file-manager';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider';

class App extends React.Component {
    render() {
        constructor() {
            super();
            this.fileSystemProvider = new CustomFileSystemProvider({
                downloadItems,
                // ...
            });
        }
        return (
            <FileManager 
                fileSystemProvider={fileSystemProvider}>
            </FileManager>
        );
    }
}
function downloadItems(Array<FileManagerItem>) {
    // ...
}
// other functions

export default App;
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().FileManager()
    .FileSystemProvider(provider => provider.Custom()
        .DownloadItems("downloadItems")
        // ...
    )    
)

<script>
    function downloadItems(Array<FileManagerItem>) {
        // ...
    }
    // other functions
</script>
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().FileManager()
    .FileSystemProvider(provider => provider.Custom()
        .DownloadItems("downloadItems")
        // ...
    )    
)

<script>
    function downloadItems(Array<FileManagerItem>) {
        // ...
    }
    // other functions
</script>

getItems

A function that gets file system items.

Type:

Function

Function parameters:
parentDirectory:

FileSystemItem

The directory that stores file system items.

Return Value:

Promise<Array<Object>> (jQuery or native)

|

Array<Object>

A Promise that is resolved after file system items are obtained. It is a native Promise or a jQuery.Promise when you use jQuery.

The getItems function returns data items and then passes them to the dataItem fields of the FileSystemItem objects. You can call the getItems method to get these file system items.

jQuery
JavaScript
$(function () {
    $("#file-manager").dxFileManager({ 
        fileSystemProvider: new DevExpress.fileManagement.CustomFileSystemProvider({ 
            getItems: function(pathInfo) { 
                // Your code goes here
            }
            //...
        }) 
    });     
});
Angular
app.component.html
app.component.ts
app.module.ts
<dx-file-manager 
    [fileSystemProvider]="fileSystemProvider">
</dx-file-manager>
import { Component } from '@angular/core';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider'; 

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

export class AppComponent {
    fileSystemProvider: CustomFileSystemProvider;
    constructor(http: HttpClient) {
        this.fileSystemProvider = new CustomFileSystemProvider({
            getItems,
            // ...
        });
    }
}

function getItems(pathInfo) {
    // ...
}
// other functions
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { DxFileManagerModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxFileManagerModule
    ],
    //...
})
export class AppModule { }
Vue
App.vue
<template>
    <DxFileManager
        :file-system-provider="fileSystemProvider">
    </DxFileManager>
</template>

<script>
import 'devextreme/dist/css/dx.light.css'; 
import { DxFileManager } from 'devextreme-vue/file-manager';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider';

export default {
    components: {
        DxFileManager
    },

    data() {
        return {
            fileSystemProvider: new CustomFileSystemProvider({
                getItems,
                // ...
            }),
        };
    }
};

function getItems(pathInfo) {
    // ...
}
// other functions

</script>
React
App.js
import React from 'react';
import 'devextreme/dist/css/dx.light.css';
import FileManager from 'devextreme-react/file-manager';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider';

class App extends React.Component {
    render() {
        constructor() {
            super();
            this.fileSystemProvider = new CustomFileSystemProvider({
                getItems,
                // ...
            });
        }
        return (
            <FileManager 
                fileSystemProvider={fileSystemProvider}>
            </FileManager>
        );
    }
}
function getItems(pathInfo) {
    // ...
}
// other functions

export default App;
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().FileManager()
    .FileSystemProvider(provider => provider.Custom()
        .GetItems("getItems")
        // ...
    )    
)

<script>
    function getItems(pathInfo) {
        // ...
    }
    // other functions
</script>
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().FileManager()
    .FileSystemProvider(provider => provider.Custom()
        .GetItems("getItems")
        // ...
    )    
)

<script>
    function getItems(pathInfo) {
        // ...
    }
    // other functions
</script>

getItemsContent

A function that get items content.

Type:

Function

Function parameters:
items:

Array<FileSystemItem>

The file system items.

Return Value:

Promise<Object> (jQuery or native)

|

Object

A Promise that is resolved after the content of the file system items is obtained. It is a native Promise or a jQuery.Promise when you use jQuery.

jQuery
JavaScript
$(function () {
    $("#file-manager").dxFileManager({ 
        fileSystemProvider: new DevExpress.fileManagement.CustomFileSystemProvider({ 
            getItemsContent: function(pathInfo) { 
                // Your code goes here
            }
            //...
        }) 
    });     
});
Angular
app.component.html
app.component.ts
app.module.ts
<dx-file-manager 
    [fileSystemProvider]="fileSystemProvider">
</dx-file-manager>
import { Component } from '@angular/core';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider'; 

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

export class AppComponent {
    fileSystemProvider: CustomFileSystemProvider;
    constructor(http: HttpClient) {
        this.fileSystemProvider = new CustomFileSystemProvider({
            getItemsContent,
            // ...
        });
    }
}

function getItemsContent(pathInfo) {
    // ...
}
// other functions
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { DxFileManagerModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxFileManagerModule
    ],
    //...
})
export class AppModule { }
Vue
App.vue
<template>
    <DxFileManager
        :file-system-provider="fileSystemProvider">
    </DxFileManager>
</template>

<script>
import 'devextreme/dist/css/dx.light.css'; 
import { DxFileManager } from 'devextreme-vue/file-manager';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider';

export default {
    components: {
        DxFileManager
    },

    data() {
        return {
            fileSystemProvider: new CustomFileSystemProvider({
                getItemsContent,
                // ...
            }),
        };
    }
};

function getItemsContent(pathInfo) {
    // ...
}
// other functions

</script>
React
App.js
import React from 'react';
import 'devextreme/dist/css/dx.light.css';
import FileManager from 'devextreme-react/file-manager';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider';

class App extends React.Component {
    render() {
        constructor() {
            super();
            this.fileSystemProvider = new CustomFileSystemProvider({
                getItemsContent,
                // ...
            });
        }
        return (
            <FileManager 
                fileSystemProvider={fileSystemProvider}>
            </FileManager>
        );
    }
}
function getItemsContent(pathInfo) {
    // ...
}
// other functions

export default App;
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().FileManager()
    .FileSystemProvider(provider => provider.Custom()
        .GetItemsContent("getItemsContent")
        // ...
    )    
)

<script>
    function getItemsContent(pathInfo) {
        // ...
    }
    // other functions
</script>
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().FileManager()
    .FileSystemProvider(provider => provider.Custom()
        .GetItemsContent("getItemsContent")
        // ...
    )    
)

<script>
    function getItemsContent(pathInfo) {
        // ...
    }
    // other functions
</script>

hasSubDirectoriesExpr

A function or the name of a data source field that provides information on whether a file or folder contains sub directories.

Type:

String

|

Function

jQuery
JavaScript
$(function () {
    $("#file-manager").dxFileManager({ 
        fileSystemProvider: new DevExpress.fileManagement.CustomFileSystemProvider({ 
            hasSubDirectoriesExpr: "hasDirectories"
            //...
        }) 
    });     
});
Angular
app.component.html
app.component.ts
app.module.ts
<dx-file-manager 
    [fileSystemProvider]="fileSystemProvider">
</dx-file-manager>
import { Component } from '@angular/core';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider'; 

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

export class AppComponent {
    fileSystemProvider: CustomFileSystemProvider;
    constructor(http: HttpClient) {
        this.fileSystemProvider = new CustomFileSystemProvider({
            hasSubDirectoriesExpr: "hasSubDirectories",
            // ...
        });
    }
}
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { DxFileManagerModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxFileManagerModule
    ],
    //...
})
export class AppModule { }
Vue
App.vue
<template>
    <DxFileManager
        :file-system-provider="fileSystemProvider">
    </DxFileManager>
</template>

<script>
import 'devextreme/dist/css/dx.light.css'; 
import { DxFileManager } from 'devextreme-vue/file-manager';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider';

export default {
    components: {
        DxFileManager
    },

    data() {
        return {
            fileSystemProvider: new CustomFileSystemProvider({
                hasSubDirectoriesExpr: "hasSubDirectoriesExpr",
            }),
        };
    }
};
</script>
React
App.js
import React from 'react';
import 'devextreme/dist/css/dx.light.css';
import FileManager from 'devextreme-react/file-manager';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider';

class App extends React.Component {
    render() {
        constructor() {
            super();
            this.fileSystemProvider = new CustomFileSystemProvider({
                hasSubDirectoriesExpr: "hasSubDirectoriesExpr",
                // ...
            });
        }
        return (
            <FileManager 
                fileSystemProvider={fileSystemProvider}>
            </FileManager>
        );
    }
}

export default App;
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().FileManager()
    .FileSystemProvider(provider => provider.Custom()
        .HasSubDirectoriesExpr("hasSubDirectoriesExpr")
        // ...
    )    
)
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().FileManager()
    .FileSystemProvider(provider => provider.Custom()
        .HasSubDirectoriesExpr("hasSubDirectoriesExpr")
        // ...
    )    
)

isDirectoryExpr

Specifies which data field provides information about whether a file system item is a directory.

Type:

String

|

Function

keyExpr

Specifies the data field that provides keys.

Type:

String

|

Function

moveItem

A function that moves files and folders.

Type:

Function

Function parameters:
item:

FileSystemItem

The current file system item.

destinationDirectory:

FileSystemItem

The directory where a file system item is moved to.

Return Value:

Promise<any> (jQuery or native)

| any

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

jQuery
JavaScript
$(function () {
    $("#file-manager").dxFileManager({ 
        fileSystemProvider: new DevExpress.fileManagement.CustomFileSystemProvider({ 
            moveItem: function(item, destinationDir) { 
                // Your code goes here
            }
            //...
        }) 
    });     
});
Angular
app.component.html
app.component.ts
app.module.ts
<dx-file-manager 
    [fileSystemProvider]="fileSystemProvider">
</dx-file-manager>
import { Component } from '@angular/core';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider'; 

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

export class AppComponent {
    fileSystemProvider: CustomFileSystemProvider;
    constructor(http: HttpClient) {
        this.fileSystemProvider = new CustomFileSystemProvider({
            moveItem,
            // ...
        });
    }
}

function moveItem(item, destinationDir) {
    // ...
}
// other functions
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { DxFileManagerModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxFileManagerModule
    ],
    //...
})
export class AppModule { }
Vue
App.vue
<template>
    <DxFileManager
        :file-system-provider="fileSystemProvider">
    </DxFileManager>
</template>

<script>
import 'devextreme/dist/css/dx.light.css'; 
import { DxFileManager } from 'devextreme-vue/file-manager';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider';

export default {
    components: {
        DxFileManager
    },

    data() {
        return {
            fileSystemProvider: new CustomFileSystemProvider({
                moveItem,
                // ...
            }),
        };
    }
};

function moveItem(item, destinationDir) {
    // ...
}
// other functions

</script>
React
App.js
import React from 'react';
import 'devextreme/dist/css/dx.light.css';
import FileManager from 'devextreme-react/file-manager';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider';

class App extends React.Component {
    render() {
        constructor() {
            super();
            this.fileSystemProvider = new CustomFileSystemProvider({
                moveItem,
                // ...
            });
        }
        return (
            <FileManager 
                fileSystemProvider={fileSystemProvider}>
            </FileManager>
        );
    }
}
function moveItem(item, destinationDir) {
    // ...
}
// other functions

export default App;
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().FileManager()
    .FileSystemProvider(provider => provider.Custom()
        .MoveItem("moveItem")
        // ...
    )    
)

<script>
    function moveItem(item, destinationDir) {
        // ...
    }
    // other functions
</script>
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().FileManager()
    .FileSystemProvider(provider => provider.Custom()
        .MoveItem("moveItem")
        // ...
    )    
)

<script>
    function moveItem(item, destinationDir) {
        // ...
    }
    // other functions
</script>

nameExpr

Specifies which data field provides file and directory names.

Type:

String

|

Function

renameItem

A function that renames files and folders.

Type:

Function

Function parameters:
item:

FileSystemItem

The current file system item.

newName:

String

The new name for the file system item.

Return Value:

Promise<any> (jQuery or native)

| any

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

jQuery
JavaScript
$(function () {
    $("#file-manager").dxFileManager({ 
        fileSystemProvider: new DevExpress.fileManagement.CustomFileSystemProvider({ 
            renameItem: function(item, name) { 
                // Your code goes here
            }
            //...
        }) 
    });
});
Angular
app.component.html
app.component.ts
app.module.ts
<dx-file-manager 
    [fileSystemProvider]="fileSystemProvider">
</dx-file-manager>
import { Component } from '@angular/core';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider'; 

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

export class AppComponent {
    fileSystemProvider: CustomFileSystemProvider;
    constructor(http: HttpClient) {
        this.fileSystemProvider = new CustomFileSystemProvider({
            renameItem,
            // ...
        });
    }
}

function renameItem(item, name) {
    // ...
}
// other functions
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { DxFileManagerModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxFileManagerModule
    ],
    //...
})
export class AppModule { }
Vue
App.vue
<template>
    <DxFileManager
        :file-system-provider="fileSystemProvider">
    </DxFileManager>
</template>

<script>
import 'devextreme/dist/css/dx.light.css'; 
import { DxFileManager } from 'devextreme-vue/file-manager';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider';

export default {
    components: {
        DxFileManager
    },

    data() {
        return {
            fileSystemProvider: new CustomFileSystemProvider({
                renameItem,
                // ...
            }),
        };
    }
};

function renameItem(item, name) {
    // ...
}
// other functions

</script>
React
App.js
import React from 'react';
import 'devextreme/dist/css/dx.light.css';
import FileManager from 'devextreme-react/file-manager';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider';

class App extends React.Component {
    render() {
        constructor() {
            super();
            this.fileSystemProvider = new CustomFileSystemProvider({
                renameItem,
                // ...
            });
        }
        return (
            <FileManager 
                fileSystemProvider={fileSystemProvider}>
            </FileManager>
        );
    }
}
function renameItem(item, name) {
    // ...
}
// other functions

export default App;
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().FileManager()
    .FileSystemProvider(provider => provider.Custom()
        .RenameItem("renameItem")
        // ...
    )    
)

<script>
    function renameItem(item, name) {
        // ...
    }
    // other functions
</script>
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().FileManager()
    .FileSystemProvider(provider => provider.Custom()
        .RenameItem("renameItem")
        // ...
    )    
)

<script>
    function renameItem(item, name) {
        // ...
    }
    // other functions
</script>

sizeExpr

Specifies which data field provides file sizes.

Type:

String

|

Function

thumbnailExpr

Specifies which data field provides icons to be used as thumbnails.

Type:

String

|

Function

The data field can contain one of the following:

uploadFileChunk

A function that uploads a file in chunks.

Type:

Function

Function parameters:
file:

File

The file that is being uploaded.

uploadInfo:

UploadInfo

Information about the file upload session.

destinationDirectory:

FileSystemItem

The directory where a file system item is uploaded to.

Return Value:

Promise<any> (jQuery or native)

| any

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

jQuery
JavaScript
$(function () {
    $("#file-manager").dxFileManager({ 
        fileSystemProvider: new DevExpress.fileManagement.CustomFileSystemProvider({ 
            uploadFileChunk: function(fileData, chunksInfo, destinationDir) { 
                // Your code goes here
            }
            //...
        }) 
    });
});
Angular
app.component.html
app.component.ts
app.module.ts
<dx-file-manager 
    [fileSystemProvider]="fileSystemProvider">
</dx-file-manager>
import { Component } from '@angular/core';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider'; 

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

export class AppComponent {
    fileSystemProvider: CustomFileSystemProvider;
    constructor(http: HttpClient) {
        this.fileSystemProvider = new CustomFileSystemProvider({
            uploadFileChunk,
            // ...
        });
    }
}

function uploadFileChunk(fileData, chunksInfo, destinationDir) {
    // ...
}
// other functions
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { DxFileManagerModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxFileManagerModule
    ],
    //...
})
export class AppModule { }
Vue
App.vue
<template>
    <DxFileManager
        :file-system-provider="fileSystemProvider">
    </DxFileManager>
</template>

<script>
import 'devextreme/dist/css/dx.light.css'; 
import { DxFileManager } from 'devextreme-vue/file-manager';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider';

export default {
    components: {
        DxFileManager
    },

    data() {
        return {
            fileSystemProvider: new CustomFileSystemProvider({
                uploadFileChunk,
                // ...
            }),
        };
    }
};

function uploadFileChunk(fileData, chunksInfo, destinationDir) {
    // ...
}
// other functions

</script>
React
App.js
import React from 'react';
import 'devextreme/dist/css/dx.light.css';
import FileManager from 'devextreme-react/file-manager';
import CustomFileSystemProvider from 'devextreme/file_management/custom_provider';

class App extends React.Component {
    render() {
        constructor() {
            super();
            this.fileSystemProvider = new CustomFileSystemProvider({
                uploadFileChunk,
                // ...
            });
        }
        return (
            <FileManager 
                fileSystemProvider={fileSystemProvider}>
            </FileManager>
        );
    }
}
function uploadFileChunk(fileData, chunksInfo, destinationDir) {
    // ...
}
// other functions

export default App;
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().FileManager()
    .FileSystemProvider(provider => provider.Custom()
        .UploadFileChunk("uploadFileChunk")
        // ...
    )    
)

<script>
    function uploadFileChunk(fileData, chunksInfo, destinationDir) {
        // ...
    }
    // other functions
</script>
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().FileManager()
    .FileSystemProvider(provider => provider.Custom()
        .UploadFileChunk("uploadFileChunk")
        // ...
    )    
)

<script>
    function uploadFileChunk(fileData, chunksInfo, destinationDir) {
        // ...
    }
    // other functions
</script>