ASP.NET中Linq查询数据的用法

/// <summary>
/// Sql查询
/// </summary>
public void DataInit()
{
//计算程序处理数据时间
Stopwatch watch = new Stopwatch();
//开始计算
watch.Start();
using (SqlConnection conn = new SqlConnection(@"server=libiao-PC;User ID=sa;Password=123456;database=mydata;"))
{
conn.Open();

using (SqlCommand cmd = conn.CreateCommand())
{
//查询语句
cmd.CommandText = "select * from users";

SqlDataAdapter adapter = new SqlDataAdapter();
adapter.SelectCommand = cmd;
DataSet ds = new DataSet();
adapter.Fill(ds);
this.GridView1.DataSource = ds;
this.GridView1.DataBind();
ds.Dispose();

}
}
//结束计算
watch.Stop();
//打印运行时间
Response.Write("我是第一个："+watch.Elapsed.Milliseconds.ToString());
}

 /// <summary>
/// Linq查询
/// </summary>
private  void DataLoad()
{
//计算程序处理数据时间
Stopwatch watch = new Stopwatch();
//开始计算时间
watch.Start();
using (LinqInnerJoinDataContext ctx = new LinqInnerJoinDataContext("server=libiao-PC;User ID=sa;Password=123456;database=mydata;"))
{
//查询信息
var table = from c in ctx.Users select c;
this.GridView2.DataSource = table;
this.GridView2.DataBind();
}
//结束计算时间
watch.Stop();
//打印出程序运行时间
Response.Write("我是第二个:" + watch.Elapsed.Milliseconds.ToString());
}