ToList

protected void Page_Load(object sender, EventArgs e)
{
//构造List<UserInfo>泛型列表
List<UserInfo> users = new List<UserInfo> {
new UserInfo{UserCode=1, UserName="User001", Password="001"},
new UserInfo{UserCode=2, UserName="User002", Password="002"},
new UserInfo{UserCode=3, UserName="User003", Password="003"},
new UserInfo{UserCode=4, UserName="User004", Password="004"}
};
//使用LINQ查询用户名等于User001或密码等于003的列表项
//此时的query变量的类型是IEnumerable<UserInfo>类型
var query = from item in users
where item.UserName == "User001" || item.Password == "003"
select item;
//使用ToList方法将IEnumerable<UserInfo>类型转换为List<UserInfo>类型
List<UserInfo> filteredUsers = query.ToList<UserInfo>();
//将泛型列表绑定GridView
GridView1.DataSource = filteredUsers;
GridView1.DataBind();
}

public class UserInfo
{
public UserInfo()
{
//
//TODO: 在此处添加构造函数逻辑
//
}

public int UserCode { get; set; }

public string UserName { get; set; }

public string Password { get; set; }

}