private void TextBox1_TextChanged(object sender, System.EventArgs e)
  {
  btnSearch_Click(sender,e);
  }


这个TEXTBOX id为 tbHolderCode,要单击的按钮id是 "btnConfirm",按回车焦点就跳到确认按钮,再按就提交了
<SCRIPT language="JavaScript" event="onkeyup" for="tbHolderCode">
   if (event.keyCode==13)
   {    
    Form1.btnConfirm.focus();
    return false;
   }
  </SCRIPT>

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