using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace ToList
{
public partial class Frm_Main : Form
{
public Frm_Main()
{
InitializeComponent();
}
private void Frm_Main_Load(object sender, EventArgs e)
{
//结构List泛型列表
Listusers = new List{
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"}};
//运用LINQ查询用户名等于User001或暗码等于003的列表项
//此刻的query变量的类型是IEnumerable类型
var query = from item in users
where item.UserName == "User001" || item.Password == "003"
select item;
//运用ToList办法将IEnumerable类型转换为List类型
ListfilteredUsers = query.ToList();
//将泛型列表绑定DataGridView
dataGridView1.DataSource = filteredUsers.ToList();
}
}
public class UserInfo
{
public int UserCode { get; set; }//用户代码
public string UserName { get; set; }//用户称号
public string Password { get; set; }//暗码
}
}
-- //--------///-----------
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