JavaScript/jQuery FileUploader - Client-Side Settings

Upload Mode

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.

View Demo

The following examples show how to configure the FileUploader for each upload mode. Therein, the name property is required to access uploaded files on the server.

  • Ajax upload

    jQuery
    HTML
    JavaScript
    <div id="fileUploaderContainer"></div>
    $(function() {
    $("#fileUploaderContainer").dxFileUploader({
        name: "file",
        // Uncomment the following line to allow a user to upload multiple files
        // multiple: true,
        uploadMode: "useButtons", // or "instantly"
        uploadUrl: "https://mydomain.com/MyUploadService"
    });
});
    Angular
    HTML
    TypeScript
    <dx-file-uploader
    name="file"
    <!-- Uncomment the following line to allow a user to upload multiple files -->
    <!-- [multiple]="true" -->
    uploadMode="useButtons" <!-- or "instantly" -->
    uploadUrl="https://mydomain.com/MyUploadService">
</dx-file-uploader>
    import { DxFileUploaderModule } from "devextreme-angular";
// ...
export class AppComponent {
    // ...
}
@NgModule({
    imports: [
        // ...
        DxFileUploaderModule
    ],
    // ...
})

  • HTML form upload

    jQuery
    HTML
    JavaScript
    <form action="https://mydomain.com/MyUploadService" method="post" enctype="multipart/form-data">
    <div id="fileUploaderContainer"></div>
    <input type="submit">
</form>
    $(function() {
    $("#fileUploaderContainer").dxFileUploader({
        name: "file",
        // Uncomment the following lines to allow a user to upload multiple files
        // multiple: true,
        // name: "files[]",
        uploadMode: "useForm"
    });
});
    Angular
    HTML
    TypeScript
    <form action="https://mydomain.com/MyUploadService" method="post" enctype="multipart/form-data">
    <dx-file-uploader
        name="file"
        <!-- Uncomment the following lines to allow a user to upload multiple files -->
        <!-- [multiple]="true" -->
        <!-- name="files[]" -->
        uploadMode="useForm">
    </dx-file-uploader>
    <input type="submit">
</form>
    import { DxFileUploaderModule } from "devextreme-angular";
// ...
export class AppComponent {
    // ...
}
@NgModule({
    imports: [
        // ...
        DxFileUploaderModule
    ],
    // ...
})
NOTE
If you allow a user to upload multiple files using an HTML form, the name property's value must end with square brackets as shown in the commented-out code line in the example above.
See Also

Chunk Upload

Chunk upload allows large files to be divided into parts called "chunks" and sent via multiple requests. To enable this feature, specify the chunk size in bytes and set uploadMode to "instantly" or "useButtons" to send files via Ajax requests.

View Demo

jQuery
JavaScript
HTML
$(function() {
    $("#fileUploaderContainer").dxFileUploader({
        name: "file",
        uploadMode: "useButtons", // or "instantly"
        uploadUrl: "https://mydomain.com/MyUploadService",
        chunkSize: 400000 // 400 KB
    });
});
<div id="fileUploaderContainer"></div>
Angular
HTML
TypeScript
<dx-file-uploader
    name="file"
    uploadMode="useButtons" <!-- or "instantly" -->
    uploadUrl="https://mydomain.com/MyUploadService"
    [chunkSize]="400000"> <!-- 400 KB -->
</dx-file-uploader>
import { DxFileUploaderModule } from "devextreme-angular";
// ...
export class AppComponent {
    // ...
}
@NgModule({
    imports: [
        // ...
        DxFileUploaderModule
    ],
    // ...
})

On the server, you should process the received chunks and merge them into a file. See the Server-Side Implementation examples in ASP.NET and PHP.

Additional Parameters in a Request

If the uploadMode is "instantly" or "useButtons", you can add parameters to the URL by modifying the uploadUrl property. For example, the following code adds an employee ID and an office number:

jQuery
JavaScript
$(function () {
    var employee = { id: 1, name: "John Heart", position: "CEO", office: 614 };
    $("#fileUploaderContainer").dxFileUploader({
        name: "file",
        uploadMode: "instantly", // or "useButtons"
        uploadUrl: "https://mydomain.com/MyUploadService",
        onValueChanged: function (e) {
            var url = e.component.option("uploadUrl");
            url = updateQueryStringParameter(url, "id", employee.id);
            e.component.option("uploadUrl", url);
        }
    });
    $("#numberBoxContainer").dxNumberBox({
        value: employee.office,
        onValueChanged: function (e) {
            if ( e.value !== e.previousValue ) {
                var fileUploader = $("#fileUploaderContainer").dxFileUploader("instance");
                var url = fileUploader.option("uploadUrl");
                url = updateQueryStringParameter(url, "office", e.value);            
                fileUploader.option("uploadUrl", url);
            }
        }
    });
    function updateQueryStringParameter (uri, key, value) {
        var re = new RegExp("([?&])" + key + "=.*?(&|$)", "i");
        var separator = uri.indexOf('?') !== -1 ? "&" : "?";
        if (uri.match(re)) {
            return uri.replace(re, '$1' + key + "=" + value + '$2');
        }
        else {
            return uri + separator + key + "=" + value;
        }
    }
});
Angular
HTML
TypeScript
<dx-file-uploader
    name="file"
    (onValueChanged)="addIdParameter($event)"
    [uploadUrl]="uploadUrl"
    uploadMode="instantly">    <!-- or "useButtons" -->
</dx-file-uploader>
<dx-number-box
    [(value)]="employee.office"
    (onValueChanged)="addOfficeParameter($event)">
</dx-number-box>
import { DxFileUploaderModule, DxNumberBoxModule } from "devextreme-angular";
// ...
export class AppComponent {
    employee = { id: 1, name: "John Heart", position: "CEO", office: 614 };
    uploadUrl = "https://mydomain.com/MyUploadService";
    addIdParameter (e) {
        this.uploadUrl = this.updateQueryStringParameter(this.uploadUrl, "id", this.employee.id);
        e.component.option("uploadUrl", this.uploadUrl);
    }
    addOfficeParameter (e) {
        if ( e.value !== e.previousValue ) {
            this.uploadUrl = this.updateQueryStringParameter(this.uploadUrl, "office", e.value);          
        }
    }
    updateQueryStringParameter (uri, key, value) {
        var re = new RegExp("([?&])" + key + "=.*?(&|$)", "i");
        var separator = uri.indexOf('?') !== -1 ? "&" : "?";
        if (uri.match(re)) {
            return uri.replace(re, '$1' + key + "=" + value + '$2');
        }
        else {
            return uri + separator + key + "=" + value;
        }
    }
}
@NgModule({
    imports: [
        // ...
        DxFileUploaderModule,
        DxNumberBoxModule
    ],
    // ...
})
ASP.NET MVC Controls
Razor C#
@model DevExtremeMvcApp.Models.Employee

@(Html.DevExtreme().FileUploader()
    .ID("fileUploader")
    .Name("file")
    .UploadMode(FileUploadMode.Instantly) // or FileUploadMode.UseButtons
    .UploadUrl(Url.Action("UploadFile", "FileUploader", new { id = @Model.EmployeeID }))
)

@(Html.DevExtreme().NumberBox()
    .Value(@Model.Office)
    .OnValueChanged("numberBox_valueChanged")
)

<script type="text/javascript">
    function numberBox_valueChanged(e) {
        if (e.value !== e.previousValue) {
            var fileUploader = $("#fileUploader").dxFileUploader("instance");
            var url = fileUploader.option("uploadUrl");
            url = updateQueryStringParameter(url, "office", e.value);
            fileUploader.option("uploadUrl", url);
        }
    }
    function updateQueryStringParameter (uri, key, value) {
        var re = new RegExp("([?&])" + key + "=.*?(&|$)", "i");
        var separator = uri.indexOf('?') !== -1 ? "&" : "?";
        if (uri.match(re)) {
            return uri.replace(re, '$1' + key + "=" + value + '$2');
        }
        else {
            return uri + separator + key + "=" + value;
        }
    }
</script>

When the uploadMode is "useForm", define the parameters within hidden inputs. They are sent to the server in an HTML form along with the files. Some DevExtreme UI components have underlying hidden inputs too. Use the UI component's name property to specify the input's name attribute.

jQuery
HTML
JavaScript
<form id="form" action="https://mydomain.com/MyUploadService" method="post" enctype="multipart/form-data">
    <input type="hidden" id="employeeId" name="id">
    <div id="fileUploaderContainer"></div>
    <div id="numberBoxContainer"></div>
    <div id="button"></div>
</form>
$(function () {
    var employee = { id: 1, name: "John Heart", position: "CEO", office: 614 };
    $("#fileUploaderContainer").dxFileUploader({
        name: "file",
        uploadMode: "useForm",
        onValueChanged: function () {
            $("#employeeId").val(employee.id);
        }
    });
    $("#numberBoxContainer").dxNumberBox({
        name: "office",    
        value: employee.office
    });
    $("#button").dxButton({
        text: "Update profile",
        useSubmitBehavior: true
    });
});
Angular
HTML
TypeScript
<form action="https://mydomain.com/MyUploadService" method="post" enctype="multipart/form-data">
    <input type="hidden" name="id" [value]="employeeId">
    <dx-file-uploader
        name="file"
        uploadMode="useForm"
        (onValueChanged)="addParameters()">
    </dx-file-uploader>
    <dx-number-box
        [(value)]="employeeOffice"
        name="office"> 
    </dx-number-box>
    <dx-button
        text="Update profile"
        [useSubmitBehavior]="true">
    </dx-button>
</form>
import { DxFileUploaderModule, DxButtonModule, DxNumberBoxModule } from "devextreme-angular";
// ...
export class AppComponent {
    employee = { id: 1, name: "John Heart", position: "CEO", office: 614 };
    employeeId: any;
    employeeOffice = this.employee.office;
    addParameters () {
        this.employeeId = this.employee.id;
    }
}
@NgModule({
    imports: [
        // ...
        DxFileUploaderModule,
        DxButtonModule,
        DxNumberBoxModule
    ],
    // ...
})
ASP.NET MVC Controls
Razor C#
@model DevExtremeMvcApp.Models.Employee

@using (Html.BeginForm("UploadFile", "FileUploader", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
    @(Html.DevExtreme().FileUploader()
        .Name("file") 
        .UploadMode(FileUploadMode.UseForm)
    )

    @Html.HiddenFor(model => Model.EmployeeID);

    @(Html.DevExtreme().NumberBox()
        .Name("office")
        .Value(model => Model.Office)
    )

    @(Html.DevExtreme().Button()
        .Text("Update Profile")
        .UseSubmitBehavior(true)
    )
}