//连接语句 public readonly string sqlconn = ConfigurationManager.ConnectionStrings["Transaction_9_30ConnectionString"].ConnectionString; //ExecuteQuery LinqToSqlDataContext LinqToSql = new LinqToSqlDataContext(sqlconn); //var result = from query in LinqToSql.Class select query; List<Class> result = LinqToSql.ExecuteQuery<Class>("select * from Class").ToList(); dataGridView1.DataSource = result; //ExecuteCommand string StringText = textBox1.Text; linq.ExecuteCommand("update Class set ClassName={0} where ClassID='5'", StringText); IEnumerable<Class> sell = linq.ExecuteQuery<Class>("select * from Class").ToList(); dataGridView2.DataSource = sell;