SqlConnection conn = new SqlConnection(); conn.ConnectionString = "Server=127.0.0.1;User ID=sa;Password=fdahgdrethj31313210212121;Database=northwind;Persist Security Info=True"; conn.Open(); SqlDataAdapter da = new SqlDataAdapter("select * from 表", conn); SqlCommandBuilder thisBulder = new SqlCommandBuilder(da); DataSet ds = new DataSet(); da.Fill(ds); ds.WriteXml(@"C:temp.xml");============================================================================== private void WriteXmlToFile(DataSet thisDataSet)