DxUpload.FileUploadStarted Event

Fires when the file upload starts.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v22.1.dll

NuGet Package: DevExpress.Blazor

Declaration

[Parameter]
public EventCallback<FileUploadEventArgs> FileUploadStarted { get; set; }

Event Data

The FileUploadStarted event's data class is FileUploadEventArgs. The following properties provide information specific to this event:

Property	Description
FileInfo	Returns information about a file.

Remarks

The FileUploadStart event fires when file upload is about to start. In Instant upload mode, the FileUploadStart event occurs when a user selects a file in the Open File dialog or drops a file onto the drop zone. In OnButtonClick upload mode, this event fires when a user clicks the upload button.

If the file upload operation is not cancelled in the FileUploadStart event, the FileUploadStarted event occurs.

<DxUpload Name="myFile" UploadUrl="https://localhost:10000/api/Upload/Upload/" 
          FileUploadStarted="@OnFileUploadStarted">
</DxUpload>
<div class="alert alert-info @(MessageVisible? " visible" : " invisible")">@MyMessage</div>

@code {
    void OnFileUploadStarted(FileUploadEventArgs e) {
        MyMessage = "Upload of the " + e.FileInfo.Name + " file was started.";
        MessageVisible = true;
        InvokeAsync(StateHasChanged);
    }
}