WPF ListView实时更新及INotifyPropertyChanged使用演示

1、ListView要实现实时更新必须要有几个条件：

（1）需要将List集合定义为ObservableCollection类型，改类型需要引用System.Collections.ObjectModel命名空间。

（2）实体类需要继承INotifyPropertyChanged接口

MainVindow.xaml.cs：

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApp3
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        private static ObservableCollection<UserData> List = new ObservableCollection<UserData>();
        private int SelectedIndex = -1;
        public MainWindow()
        {
            InitializeComponent();
            UserList.ItemsSource = List;
        }

        private void UserList_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            SelectedIndex = Convert.ToInt32(UserList.SelectedIndex.ToString());
        }

        private void Add_Click(object sender, RoutedEventArgs e)
        {
            int count = List.Count;
            int i = count + 1;
            List.Add(new UserData() { id = i, uin ="姓名"+i, pass="密码"+i });
        }

        private void Del_Click(object sender, RoutedEventArgs e)
        {
            if (SelectedIndex >= 0)
            {
                List.RemoveAt(SelectedIndex);
            }
            else
            {
                MessageBox.Show("没有选中");
            }
            
        }

        private void Edit_Click(object sender, RoutedEventArgs e)
        {
            if (SelectedIndex >= 0)
            {
                List[SelectedIndex].id = 88;
                List[SelectedIndex].uin = "张三";
                List[SelectedIndex].pass = "123456";
            }
            else
            {
                MessageBox.Show("没有选中");
            }            
        }
    }
}

MainWindow.xaml

<Window x:Class="WpfApp3.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApp3"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="320"></RowDefinition>
            <RowDefinition></RowDefinition>
        </Grid.RowDefinitions>
        <ListView x:Name="UserList" HorizontalAlignment="Left" Height="300" Margin="10" VerticalAlignment="Top" Grid.Row="0" SelectionChanged="UserList_SelectionChanged">                       
            <ListView.View>
                <GridView>
                    <GridViewColumn Header="序号" Width="50" DisplayMemberBinding="{Binding id}"/>
                    <GridViewColumn Header="账号" Width="200" DisplayMemberBinding="{Binding uin}"/>
                    <GridViewColumn Header="密码" Width="200" DisplayMemberBinding="{Binding pass}"/>
                </GridView>
            </ListView.View>
        </ListView>
        <Grid Grid.Row="1" Background="AliceBlue">
            <StackPanel Orientation="Horizontal">
                <Button Content="添加" Width="100" Height="30" Click="Add_Click" Margin="10"></Button>
                <Button Content="删除" Width="100" Height="30" Click="Del_Click" Margin="10"></Button>
                <Button Content="修改" Width="100" Height="30" Click="Edit_Click" Margin="10"></Button>
            </StackPanel>
        </Grid>
    </Grid>
</Window>

UserData.cs（实体类）

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;

namespace WpfApp3
{   

    //UserData的定义：
    class UserData : INotifyPropertyChanged //通知接口
    {
        public event PropertyChangedEventHandler PropertyChanged;
        private string _uin;
        private string _pass;
        private int _id;
        public string uin
        {
            get { return _uin; }
            set
            {
                _uin = value;
                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("uin"));
            }
        }
        public string pass
        {
            get { return _pass; }
            set
            {
                _pass = value;
                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("pass"));
            }
        }
        public int id
        {
            get { return _id; }
            set
            {
                _id = value;
                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("id"));
            }
        }
        public UserData()
        {
            _id = id;
            _uin = uin;
            _pass = pass;
        }

    }
}