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protected void btn_Click(object sender,EventArgs e)
{
  string txt=this.TextBox1.Text;
  if(ÊÇSELECT)
  {
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protected void btn_Click(object sender,EventArgs e)
{
   string txt=this.TextBox1.Text;
   if(ÊÇSELECT)
   {
        //·µ»ØÊý¾Ý¼¯
   }
   else if(UPDATE,DELETE)
   {
          //·µ»ØExecuteNonQuery
   }
}



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