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 single
public 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.cs
public 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。
作者:fwj380891124
补充:Web开发 , ASP.Net ,