c# 在一个程序里唤醒另一个程序(最小化时显示在前面)

 

方式一:

 

[DllImport("user32.dll ")]
        private static extern bool SetForegroundWindow(IntPtr hWnd);

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

        //根据任务栏应用程序显示的名称找相应窗口的句柄
        [DllImport("User32.dll", EntryPoint = "FindWindow")]
        private static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
        private const int SW_RESTORE = 9;
        private void OpenSerialPortUtility(object sender, EventArgs e)
        {  
            //遍历进程列表查找目标程序是否运行运行则前置否则启动
            Process[] pList = Process.GetProcesses(".");
            bool b = false;
            foreach (Process p in pList)
            {
                if (p.ProcessName == "wpfYourSystem")
                {
                    b = true; 
                    ShowWindow(p.MainWindowHandle, SW_RESTORE); //将窗口还原,如果不用此方法,缩小的窗口不能激活                    
                    break;
                }
            }
            if (b == false)
            {
                System.Diagnostics.Process.Start(@"C:\Users\Administrator\Desktop\9.18测试\医生端\Debug\wpfYourSystem.exe");
            }
        } 

方式二(只是唤醒程序):

 [DllImport("user32.dll")]
        public static extern void SwitchToThisWindow(IntPtr hWnd, bool fAltTab);
      


 string pName = Path.GetFileNameWithoutExtension(Application.ExecutablePath);//要启动的进程名称,可以在任务管理器里查看,一般是不带.exe后缀的;
                Process[] temp = Process.GetProcessesByName(pName);//在所有已启动的进程中查找需要的进程;
                if (temp.Length > 0)//如果查找到
                {
                    IntPtr handle = temp[0].MainWindowHandle;
                    SwitchToThisWindow(handle, true); // 激活,显示在最前
                }

 

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