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);
}