使用参数启动 ac# 程序的第二个实例，该程序的第一个实例使用该参数

Question

我有一个单实例程序，当它运行时我可以选择向它传递一个参数。

如果程序不带参数运行，只需在选项卡上打开 dataGridView 并将客户列表加载到其中。如果我双击一行，它会在第二个选项卡中打开该特定客户，并提供更多信息。

如果我使用参数（从 00000 到 99999 的客户 ID 号）启动程序，它会自动切换到第二个选项卡并加载各个客户数据。

不过，到目前为止一切顺利，我想要做的是让我的程序运行，但是如果使用参数调用该程序的第二个实例，例如 Program.exe 1234，我希望它直接跳到第二个选项卡并显示该客户的详细信息。

这是我到目前为止所拥有的。我这样做是不是找错了对象？我的印象是 Program.exe 应该监听另一个正在运行的实例并使用传递给它的参数。

任何建议将不胜感激。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Text;
using System.Diagnostics;
using System.Threading;
using System.Reflection;
using System.IO;


命名空间 SiteConnex
{
    公共类 SingleApplication
    {
        /// 导入
        [DllImport("user32.dll")]
        私有静态 extern int ShowWindow(IntPtr hWnd, int nCmdShow);
        [DllImport("user32.dll")]
        私有静态 extern int SetForegroundWindow(IntPtr hWnd);
        [DllImport("user32.dll")]
        私有静态 extern int IsIconic(IntPtr hWnd);
        公共静态布尔 SecondInstance = false;
        公共静态字符串 siteid = "";
        公共静态布尔 gotosite = false;

    public static void Main(string[] args)
    {
        // string siteid = "";
        // bool gotosite = false;
        // bool secondInstance = false;
        int testSiteid = 0;
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);

        try
        {
            siteid = Convert.ToString(args[0]);
        }
        catch (Exception noArgs)
        {
            // No commandline args have been passed.
        }


 // 检查传递的参数实际上是一个有效的数字，否则就像没有传递参数一样。
            尝试
            {
                testSiteid = Convert.ToInt32(siteid);
                if ((testSiteid > 00000) || (testSiteid < 99999))
                {
                    转到站点=真；
                }
                别的
                {
                    站点ID =“”；
                }
            }
            捕获（异常 e）
            {
                // 如果出现异常，则意味着 siteid 已传递了无用的数据。
            }

        /// Check if it's running, if it is, pass siteid and gotosite through... and acts as if it has a valid siteid passed to it. 
        // Application.Run(new Form1(siteid, gotosite));
        Run(siteid, gotosite, secondInstance);
    }

    private static IntPtr GetCurrentInstanceWindowHandle()
    {
        IntPtr hWnd = IntPtr.Zero;
        Process process = Process.GetCurrentProcess();
        Process[] processes = Process.GetProcessesByName(process.ProcessName);
        foreach(Process _process in processes)
        {
            // Get the first instance that is not this instance, has the
            // same process name and was started from the same file name
            // and location. Also check that the process has a valid
            // window handle in this session to filter out other user's
            // processes.

            if (_process.Id != process.Id &&
            _process.MainModule.FileName == process.MainModule.FileName &&
            _process.MainWindowHandle != IntPtr.Zero)
            {
                hWnd = _process.MainWindowHandle;
                break;
            }
        }
        return hWnd;
    }


    /// SwitchToCurrentInstance

    private static void SwitchToCurrentInstance(string siteid, bool gotosite, bool secondInstance)
    {
        IntPtr hWnd = GetCurrentInstanceWindowHandle();
        if (hWnd != IntPtr.Zero)
        {
        // Restore window if minimised. Do not restore if already in
        // normal or maximised window state, since we don't want to
        // change the current state of the window.
            if (IsIconic(hWnd) != 0)
            {
                ShowWindow(hWnd, SW_RESTORE);
            }
            // Set foreground window.
            SetForegroundWindow(hWnd);
            secondInstance = true;
        }
    }
        /// Execute a form base application if another instance already running on
        /// the system activate previous one
        /// <param name="frmMain">main form</param>
        /// true if no previous instance is running

    // public static bool Run(System.Windows.Forms.Form frmMain)
    public static bool Run(string siteid, bool gotosite, bool secondInstance)
    {
        if(IsAlreadyRunning())
        {
            //set focus on previously running app   
            SwitchToCurrentInstance(siteid, gotosite, secondInstance);
            return false;
        }
        Application.Run(new Form1(siteid, gotosite, secondInstance));
        return true;
    }
        /// check if given exe alread running or not
        /// returns true if already running

    private static bool IsAlreadyRunning()
    {
        string strLoc = Assembly.GetExecutingAssembly().Location;
        FileSystemInfo fileInfo = new FileInfo(strLoc);
        string sExeName = fileInfo.Name;
        bool bCreatedNew;   
        mutex = new Mutex(true, "Global\\"+sExeName, out bCreatedNew);
        if (bCreatedNew)
        mutex.ReleaseMutex();   
        return !bCreatedNew;
    }
    static Mutex mutex;
    const int SW_RESTORE = 9;
}

}

Answer 1

啊哈...找到了答案...有人叫 MadHatter 制作了一个 SingleInstance 应用程序，它完全符合我的要求，而且看起来相当简单。

http://sanity-free.org/misc/SingleInstanceApp.zip