[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);