Block during postback

 Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
          Dim sScript As String
 
          '頁面執行 Submit 時顯示 blockUI
          sScript = "$.blockUI();"
          ScriptManager.RegisterOnSubmitStatement(Me, Me.GetType(), "blockUI", sScript)
 
          '頁面載入時隱藏 blockUI
          sScript = "$.unblockUI();"
          ScriptManager.RegisterStartupScript(Me, Me.GetType(), "unblockUI", sScript, True)
End Sub