[Javascript]如何 使用顯示訊息後focus到TextBox (How to use the display message after the focus to the TextBox)

問題

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如何 使用顯示訊息後focus到TextBox



解決方法

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.aspx

<script type="text/javascript">

 function alertAfterFocus(message, objID) {

  alert(message);

  window.setTimeout(function() {

   document.getElementById(objID).focus();

  }, 0);

 }

</script>

.cs

private void ShowMessage(string msg, string objID)

{

    msg = msg.Replace("\n", "\\n");

    msg = msg.Replace("\'", string.Empty);

    string message = string.Format("alertAfterFocus('{0}','{1}');", msg, objID);

    ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "alert" + System.Guid.NewGuid().ToString(), message, true);

}

how to use

ShowMessage("xxx must keyin!!", this.textBox1.ClientID);