WPF检测网络状态切换

csharp 复制代码

<Window x:Class="NetworkChange.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="网络状态监控" Height="300" Width="400">
    <StackPanel Margin="20">
        <TextBlock Text="连接列表:" FontWeight="Bold" Margin="0,0,0,10"/>
        <ListBox x:Name="ConnectionListBox" Height="150" Margin="0,0,0,10"/>
        <TextBlock x:Name="StatusText" Text="状态: 等待网络变化..." HorizontalAlignment="Center"/>
    </StackPanel>
</Window>

csharp 复制代码

using System;
using System.Collections.ObjectModel;
using System.Net.NetworkInformation;
using System.Windows;
using System.Windows.Threading;

namespace NetworkChange
{
    public partial class MainWindow : Window
    {
        private ObservableCollection<string> connections = new ObservableCollection<string>();

        public MainWindow()
        {
            InitializeComponent();

            string originalString = "v_non_047-仪式结束 - 副本 (3).mp4";
            string result = originalString.Substring(6);
            // result = "WorldWPF"

            ConnectionListBox.ItemsSource = connections;

            // 添加一些测试数据
            connections.Add("192.168.1.100 - 计算机A");
            connections.Add("192.168.1.101 - 计算机B");

            // 开始监听网络变化
            StartNetworkMonitoring();
        }

        private void StartNetworkMonitoring()
        {
            // 使用完全限定的事件名称
            System.Net.NetworkInformation.NetworkChange.NetworkAvailabilityChanged += OnNetworkAvailabilityChanged;
            System.Net.NetworkInformation.NetworkChange.NetworkAddressChanged += OnNetworkAddressChanged;

            StatusText.Text = "状态: 正在监控网络...";
        }

        private void OnNetworkAvailabilityChanged(object sender, System.Net.NetworkInformation.NetworkAvailabilityEventArgs e)
        {
            // 使用Dispatcher确保在UI线程执行
            Dispatcher.Invoke(() =>
            {
                if (!e.IsAvailable)
                {
                    ClearConnections();
                    StatusText.Text = "状态: 网络已断开 - " + DateTime.Now.ToString("HH:mm:ss");
                }
                else
                {
                    StatusText.Text = "状态: 网络已恢复 - " + DateTime.Now.ToString("HH:mm:ss");
                }
            });
        }

        private void OnNetworkAddressChanged(object sender, EventArgs e)
        {
            Dispatcher.Invoke(() =>
            {
                ClearConnections();
                StatusText.Text = "状态: 检测到网络切换 - " + DateTime.Now.ToString("HH:mm:ss");
            });
        }

        private void ClearConnections()
        {
            connections.Clear();
            connections.Add("连接列表已清空");
        }

        protected override void OnClosed(EventArgs e)
        {
            // 清理事件监听
            System.Net.NetworkInformation.NetworkChange.NetworkAvailabilityChanged -= OnNetworkAvailabilityChanged;
            System.Net.NetworkInformation.NetworkChange.NetworkAddressChanged -= OnNetworkAddressChanged;
            base.OnClosed(e);
        }
    }
}