c# - 如何检查WPF应用程序是否已在运行？

这个问题已经在这里有了答案:




9年前关闭。






如何检查我的应用程序是否已经打开？如果我的应用程序已经在运行，我想显示它而不是打开一个新实例。

最佳答案

[DllImport("user32.dll")]
private static extern Boolean ShowWindow(IntPtr hWnd, Int32 nCmdShow);

static void Main()
{
    Process currentProcess = Process.GetCurrentProcess();
    var runningProcess = (from process in Process.GetProcesses()
                          where
                            process.Id != currentProcess.Id &&
                            process.ProcessName.Equals(
                              currentProcess.ProcessName,
                              StringComparison.Ordinal)
                          select process).FirstOrDefault();
    if (runningProcess != null)
    {
        ShowWindow(runningProcess.MainWindowHandle, SW_SHOWMAXIMIZED);
       return;
    }
}

方法2

static void Main()
{
    string procName = Process.GetCurrentProcess().ProcessName;

    // get the list of all processes by the "procName"
    Process[] processes=Process.GetProcessesByName(procName);

    if (processes.Length > 1)
    {
        MessageBox.Show(procName + " already running");
        return;
    }
    else
    {
        // Application.Run(...);
    }
}