Open a RadOpenFileDialog when Using the RadCloudUpload

Updated on Sep 15, 2025

Environment

Product

RadCloudUpload for WPF

Description

How to replace the default MS OpenFileDialog with a RadOpenFileDialog.

Solution

Handle the AddingFiles event of the RadCloudUpload control, cancel the creation of the default dialog with the CancelDialogOpening property, open a new RadOpenFileDialog and populate the FileNames collection with the files, selected in the dialog.

C#

    private void RadCloudUpload_AddingFiles(object sender, AddingFilesEventArgs e)
    {
        e.CancelDialogOpening = true;

        if (fileDialog == null)
        {
            fileDialog = new RadOpenFileDialog();
            fileDialog.Multiselect = true;
        }

        if (fileDialog.ShowDialog() == true)
        {
            foreach (var file in fileDialog.FileNames)
            {
                e.FileNames.Add(file);
            }
        }
    }

VB.NET

	Private Sub RadCloudUpload_AddingFiles(ByVal sender As Object, ByVal e As AddingFilesEventArgs)
		e.CancelDialogOpening = True

		If fileDialog Is Nothing Then
			fileDialog = New RadOpenFileDialog()
			fileDialog.Multiselect = True
		End If

		If fileDialog.ShowDialog() = True Then
			For Each file In fileDialog.FileNames
				e.FileNames.Add(file)
			Next file
		End If
	End Sub

See Also

• RadCloudUpload Eventts
• RadOpenFileDialog