我怎么能执行我的应用程序的一个实例？

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如何确保我的应用程序的一个实例，并试图打开第二个实例时，焦点设置呢？

How can I ensure a single instance of my application and to set the focus to it when attempting to open a second instance?

我想：

public partial class Form1 : Form { [DllImport("USER32.DLL", CharSet = CharSet.Unicode)] public static extern IntPtr FindWindow(String lpClassName, String lpWindowName); [DllImport("USER32.DLL")] public static extern Boolean SetForegroundWindow(IntPtr hWnd); private void Form1_Load(object sender, EventArgs e) { bool isRunning = Process.GetProcesses() .Where(p => p.MainWindowTitle.Contains(Text)) .Count() > 1; if (isRunning) { FocusWindow(Text); Application.Exit(); } } public static void FocusWindow(string title) { SetForegroundWindow(FindWindow(null, title)); } }

这是重点不在于应用。我该如何解决这个问题？

This is not focusing the application. How can I fix this?

推荐答案

您可能需要使用互斥代替，避免了搜索窗口在一个稍微不可靠的方式（想象你重命名你的主要形式或打开另一种形式代替）。

You may want to use Mutex instead, which avoids to search for windows in a slightly unreliable way (imagine you rename your main form or open another form instead).

bool createdNew; Mutex m = new Mutex(true, "SomeNameHere", out createdNew); if (!createdNew) { // Application already running. Call it and ask to show it's form. IpcClientChannel clientChannel = new IpcClientChannel(); ChannelServices.RegisterChannel(clientChannel, true); RemotingConfiguration.RegisterWellKnownClientType(typeof(ExchangeBase), "ipc://SomeNameHere/YourAppBase"); ExchangeBase Exchange = new ExchangeBase(); Exchange.ShowForm(); } else { IpcServerChannel serverChannel = new IpcServerChannel("SomeNameHere"); ChannelServices.RegisterChannel(serverChannel, true); RemotingConfiguration.RegisterWellKnownServiceType(typeof(ExchangeBase), "YourAppBase", WellKnownObjectMode.SingleCall); Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); MainForm = new FormMain(); if (!MainForm.StopLoading) { Application.Run(MainForm); // Keep the mutex reference alive until the termination of the program. GC.KeepAlive(m); } }