保存超时，为什么数据却保存成功？
WEBSERVICE 一个插入数据函数

[WebMethod]
  public string InsertData(DataTable dt)
  {
  SqlConnection conn2 = GetConn();
  SqlTransaction t = conn2.BeginTransaction();
  SqlCommand Cmd = conn2.CreateCommand();
  Cmd.Transaction = t;
   
  try
  {
  foreach (DataRow dr in dt.Rows)
  {
   
  Cmd.Parameters.Clear();
  Cmd.CommandText = "insert into productdata(orderdate,ordernumber,address,customer,phone,specification,receivable,remark,station,depot,arristationdate) Values(@orderdate,@ordernumber,@address,@customer,@phone,@specification,@receivable,@remark,@station,@depot,@arristationdate)";

  Cmd.Parameters.Add(new SqlParameter("@orderdate", dr["orderdate"].ToString()));
  Cmd.Parameters.Add(new SqlParameter("@ordernumber", dr["ordernumber"].ToString()));
  Cmd.Parameters.Add(new SqlParameter("@address", dr["address"].ToString()));
  Cmd.Parameters.Add(new SqlParameter("@customer", dr["customer"].ToString()));
  Cmd.Parameters.Add(new SqlParameter("@phone", dr["phone"].ToString()));
  Cmd.Parameters.Add(new SqlParameter("@specification", dr["specification"].ToString()));
  Cmd.Parameters.Add(new SqlParameter("@receivable", dr["receivable"].ToString()));
  Cmd.Parameters.Add(new SqlParameter("@remark", dr["remark"].ToString()));
  Cmd.Parameters.Add(new SqlParameter("@station", dr["station"].ToString()));
  Cmd.Parameters.Add(new SqlParameter("@depot", dr["depot"].ToString()));
  Cmd.Parameters.Add(new SqlParameter("@arristationdate", dr["arristationdate"].ToString()));

  int intResult=Cmd.ExecuteNonQuery();
  }
   
  t.Commit();
   
  }
  catch (Exception ext)
  {
  t.Rollback();
  return (ext.Message);

  }
  finally
  {
  Cmd.Clone();
  conn2.Close();
  }
  return ("true");
  }



客户端调用插入数据：

private void buttonSave_Click(object sender, EventArgs e)
  {
   
  dataGridView1.EndEdit();
  bscustomers.EndEdit();

  DataTable result = (DataTable)bscustomers.DataSource;
  DataTable tableAdded = result.GetChanges(DataRowState.Added);
  if (tableAdded != null && tableAdded.Rows.Count > 0)
  {
  string strvalue = s.InsertData(tableAdded);

  if (strvalue == "true")
  {
  MessageBox.Show("保存成功");
  ((DataTable)(bscustomers.DataSource)).AcceptChanges();
  }
  else
  {
  MessageBox.Show(strvalue);
  }

  }
  }

上面是使用C#调用WEBSERVICE插入数据，如果数