C# 检查启动的程序是否已经在运行 判断问题

[Struggle哥]

//检查启动的程序是否已经在运行
private static void CheckRunning()
{
bool newMutexCreated = true;
using (new Mutex(true, Assembly.GetExecutingAssembly().FullName, out newMutexCreated))
{
if (!newMutexCreated)
{
MessageBox.Show("该程序已经被运行");
System.Environment.Exit(0);
//return;
}
}
}

为什么 newMutexCreated 返回值总是 true

[kingdom_0]

如果你的程序代码 在你验证的启动的程序中，肯定每次都是返回true

[kingdom_0]

还有，在程序中，除了初始化之外，你没有对变量 newMutexCreated 赋过值

[ParanoidKing]

Mutex对象不能放在using里面，它不能被关掉

[北京的雾霾天]

参考一下如下代码：
[STAThread]
static void Main()
{
bool isNew = false;
System.Threading.Mutex mInstance = new System.Threading.Mutex(true, "test", out isNew);
if (!isNew)
{
mInstance.Close();
return;
}

//...

mInstance.ReleaseMutex();
mInstance.Close();
}

[小志]

namespace MonitorsTool.CM {
static class Program {
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main() {
try {
bool canCreateNew = false;
Mutex mutex = new Mutex(true, Process.GetCurrentProcess().ProcessName, out canCreateNew);

if (canCreateNew) {
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new MainForm());
mutex.ReleaseMutex();
} else {
MTMessageBox.ShowInfoMessageBox(null, "监视器工具已经在运行中", false);
}
} catch (Exception ex) {
Global.mainLog.Error("监视器工具无法启动", ex);
MTMessageBox.ShowErrorMessageBox(null, "监视器工具无法启动", false);
}
}
}
}

[wy811007]

Program.cs 应该写在这个文件里判断程序是否已经启动
其实你这个不是所谓的判断启动
而是想弄同一个程序不能运行第二次吧


namespace FormDemo
{
static class Program
{
private static Mutex FapiTaskMutex;
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
try
{
FapiTaskMutex = Mutex.OpenExisting(@"Global\FapiTaskMutex");
return;
}
catch (WaitHandleCannotBeOpenedException)
{
FapiTaskMutex = new Mutex(false, @"Global\FapiTaskMutex");
}
catch (Exception)
{
return;
}

Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form_Main());
}
}
}

[寒江易雪_王孙]

都是牛逼人，这方法还真没用过

[isjoe]

/// <summary>
        /// 互斥实例
        /// </summary>
        private Mutex m_mt           = null;

/// <summary>
        /// 标识是否一个实例已经运行
        /// </summary>
        private bool m_bIsRun        = false;

/// <summary>
        /// 
        /// </summary>
        /// <param name="lpClassName"></param>
        /// <param name="lpWindowName"></param>
        /// <returns></returns>
        [DllImport("user32.dll", EntryPoint = "FindWindow")]
        public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);


        /// <summary>
        /// 
        /// </summary>
        /// <param name="hwnd"></param>
        /// <returns></returns>
        [DllImport("user32.dll", EntryPoint = "SetForegroundWindow")]
        public static extern IntPtr SetForegroundWindow(IntPtr hwnd);

/// <summary>
        /// 构造函数
        /// </summary>
        public frm_Login()
        {
            try
            {               
                this.MutexRun();
            }
            catch (Exception me)
            {                
                DevExpress.XtraEditors.XtraMessageBox.Show(me.Message);                
            }
            InitializeComponent();
        }

        #endregion

        #region -初始化提取信息

        /// <summary>
        /// 单实例设置
        /// </summary>
        private void MutexRun()
        {
            bool bRun;
            m_mt = new Mutex(true, "TestRun", out bRun);
            if (!bRun)
            {
                //检查当前程序是否运行，如果已经运行则设置为前端显示提醒用户
                IntPtr Hander = CommonGenerator.FindWindow(null, "你的程序窗口标题");
                if (Hander != IntPtr.Zero)
                {
                    CommonGenerator.SetForegroundWindow(Hander);
                }
                m_mt.Close();
                Environment.Exit(1);
                return;
            }
        }