Below code running old version but i have updated version no run now.
function
fileUploaded(sender, args) {
$find(
'RadAjaxManager1').ajaxRequest();
sender.deleteFileInputAt(0);
}
<telerik:radasyncupload runat="server" ID="AsyncUpload1" MaxFileInputsCount="1"
OnClientFileUploaded="fileUploaded" TargetPhysicalFolder="~/Image/Upload"
Width="90px" OverwriteExistingFiles="True" >
<Localization Select="Choose Avatar" />
</telerik:radasyncupload>
Try
' file.Add(e.File)
Dim fileStream As IO.Stream = e.File.InputStream
Dim imageData As Byte() = New Byte(fileStream.Length - 1) {}
fileStream.Read(imageData, 0,
CInt(fileStream.Length))
Thumbnail1.DataValue = imageData
fileStream.Close()
Catch ex As Exception
End Try