原文:wpf只运行一个实例
在winform下,只运行一个实例只需这样就可以:
1. 首先要添加如下的namespace:
using System.Threading;
2. 修改系统Main函数,大致如下:
bool bCreatedNew;
//Create a new mutex using specific mutex name
Mutex m =new Mutex( false, "myUniqueName", out bCreatedNew );
if( bCreatedNew )
Application.Run(new yourFormName());
在wpf中如何做呢?
我在微软论坛发帖之后,有高手提出了如下的解决办法,我试验之后,此法可行,就贴出来和大家分享。有人还有其他解决办法,可以写出来一起探讨:
首先 引用Microsoft.VisualBasic然后新建一个类 singlepublic class single:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase { App a;public single() {this.IsSingleInstance = true; }protected override bool OnStartup(Microsoft.VisualBasic.ApplicationServices.StartupEventArgs eventArgs) { a = new App(); a.InitializeComponent(); a.Run();return false; }protected override void OnStartupNextInstance(Microsoft.VisualBasic.ApplicationServices.StartupNextInstanceEventArgs eventArgs) {base.OnStartupNextInstance(eventArgs); a.activate(); } } app.cspublic partial class App : Application {protected override void OnStartup(StartupEventArgs e) {base.OnStartup(e); Window1 w = new Window1(); w.Show(); }public void activate() { MainWindow.Activate(); }private void Application_SessionEnding(object sender, SessionEndingCancelEventArgs e) { }private void Application_Startup(object sender, StartupEventArgs e) { }private void Application_Exit(object sender, ExitEventArgs e) { } }app.g.cs [System.STAThreadAttribute()] [System.Diagnostics.DebuggerNonUserCodeAttribute()]public static void Main(string [] a ) { single s = new single(); s.Run(a); }
刚开始运行的时候,虽然实现了再次点击不会有新实例,但是却每次都实例了两个窗口的情况。去掉 app.xaml中StartupUri属性就OK了。
时间: 2024-12-06 03:31:34