Refresh page on button click

Markup page

<script runat="server">
Sub UpdateMessage(ByVal source As Object, ByVal e As SqlDataSourceStatusEventArgs)
  If e.AffectedRows > 0 Then
    ' Perform any additional processing, 
    ' such as setting a status label after the operation.        
    Page.Response.Redirect(Page.Request.Url.ToString(), True)
   End If
  End Sub 'UpdateMessage
</script>


<asp:SqlDataSource ID="ImgEditDS4" runat="server" 
    ConnectionString="< %$ ConnectionStrings:MyConnStr %>"  
    SelectCommand="SELECT [photo_id], [photo_1] WHERE ([photo_id] = @p_id)" 
    UpdateCommand="UPDATE [MyTable] SET [photo_1] = @photo_1 WHERE [photo_id] = @f_id"
    OnUpdated="UpdateMessage" >
<SelectParameters>
  <asp:QueryStringParameter Name="p_id" QueryStringField="aid" Type="Int32" />
  </SelectParameters>
  <UpdateParameters>
  <asp:Parameter Name="photo_1" Type="String" />
  <asp:Parameter Name="p_id" Type="Int32" />
  </UpdateParameters>
</asp:SqlDataSource>