The RadUpload allows the files to be uploaded automatically after the user selects them from the browse dialog window. Which means that the user won't have to click the Upload button to start the process. To enable the Automatic Upload feature you can set the IsAutomaticUpload property of the RadUpload to True (its default value is False).
[XAML] Example 1: Enabling the automatic upload feature in XAML
<telerik:RadUpload IsAutomaticUpload="True" />
[C#] Example 2: Enabling the automatic upload feature in code
RadUpload radUpload = new RadUpload(); radUpload.IsAutomaticUpload = true;
[VB.NET] Example 2: Enabling the automatic upload feature
Dim radUpload As New RadUpload() radUpload.IsAutomaticUpload = True