Skip to main content

DevExpress v24.2 Update — Your Feedback Matters

Our What's New in v24.2 webpage includes product-specific surveys. Your response to our survey questions will help us measure product satisfaction for features released in this major update and help us refine our plans for our next major release.

Take the survey Not interested

DxUpload.FileUploadStarted Event

Fires when the file upload starts.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v24.2.dll

NuGet Package: DevExpress.Blazor

#Declaration

C#
[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.

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

@code {
    bool MessageVisible { get; set; } = false;
    string MyMessage { get; set; } = "";

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

File Upload Started

See Also