private void BtnSearchDocNo_Click(object sender, EventArgs e)
 {
     try
     {
         using (DBAuditDataContext dc = new DBAuditDataContext())
         {
             var c = dc.ProGetCureByDocNo(TxtDocNo.Text);
             GrdViewCure.DataSource = c;
             ComboName.Text         = "";
             ComboLocation.Text     = "";
         }
     }
     catch (Exception EX)
     {
         MessageBox.Show(EX.Message);
     }
 }