使用参数启动ac＃程序的第二个实例，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，我可以选择将一个参数传递给它。

如果程序没有参数运行，则只需在选项卡上打开dataGridView并将客户列表加载到其中即可。 如果我双击一行，它将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（客户ID号从00000到99999）启动程序，它将自动切换到第二个选项卡并加载各个客户数据。

到目前为止，到目前为止，我想做的就是让我的程序运行，但是如果使用参数（例如Program.exe 1234）调用该程序的第二个实例，我希望它直接跳转到第二个标签并显示该客户的详细信息。

到目前为止，这就是我所拥有的。 我是用尝试的方式吠叫错误的树吗？ 我得到的印象是Program.exe应该侦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;


namespace SiteConnex { public class SingleApplication { /// Imports [DllImport("user32.dll")] private static extern int ShowWindow(IntPtr hWnd, int nCmdShow); [DllImport("user32.dll")] private static extern int SetForegroundWindow(IntPtr hWnd); [DllImport("user32.dll")] private static extern int IsIconic(IntPtr hWnd); public static bool secondInstance = false; public static string siteid = ""; public static bool 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.
        }


// check that the parameter passed is actually a valid number, otherwise just act like no params passed. try { testSiteid = Convert.ToInt32(siteid); if ((testSiteid > 00000) || (testSiteid < 99999)) { gotosite = true; } else { siteid = ""; } } catch (Exception e) { // If you get an exception it means siteid had duff data passed into it. }

        /// 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。。。找到答案了……一个叫MadHatter的人制作了一个SingleInstance应用，该应用完全符合我的期望，而且看起来很简单。

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