DataContext.ExecuteQuery的两种方法调用

ExecuteQuery主要用于DataContext类直接执行SQL语句的查询，在MSDN上有两种执行方法，下面为两种方法的不同调用：

1、ExecuteQuery<TResult>(String, Object[])   应该是微软的推荐方法，网上几乎都在用的方法

NorthwindDataContext ctx = new NorthwindDataContext("server=xxx;database=Northwind;uid=xxx;pwd=xxx");



string newcity = "Shanghai";



ctx.ExecuteCommand("update Customers set City={0} where CustomerID like 'A%'", newcity);



IEnumerable<Customer> customers = ctx.ExecuteQuery<Customer>("select * from Customers where CustomerID like 'A%'");



GridView1.DataSource = customers;



GridView1.DataBind();

2、ExecuteQuery(Type, String, Object[])  Type为要返回的 IEnumerable<T> 的类型。

DataContext db = new DataContext("Data Source=*******;Initial Catalog=*****;Persist Security Info=True;User ID=sa;Password=*****");

            StreamWriter sw = new StreamWriter(Server.MapPath("log.txt"), true);

            //db.Log = sw;

            Table<NewsList> news = db.GetTable<NewsList>();

            var select = from p in news select new { 标题 = p.title };

            IDbCommand cmd = db.GetCommand(select);

            var newss = db.ExecuteQuery(typeof(NewsList), "SELECT NewsID,TITLE FROM lmh_Newslist");

            foreach (var s in newss)

            {

                NewsList s1 = (NewsList)s;

                //Response.Write(s1.title);

            }