只运行一个exe应用程序的使用案例

应用程序的exe启动设置

using System;
using System.Diagnostics;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Threading;
using System.Windows.Forms;

namespace OnlyRunOneEXE
{
static class Program
{
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
#region 第一种方式
//if (IsExistRunApplicationOrEXE())
//{
// MessageBox.Show("软件已经在运行！！！", "信息提示：");
// return;
//}
//else
//{
// Application.Run(new Form1());
//}
#endregion

#region MyRegion

Process process = RunningInstance();
if (process != null)
{
//MessageBox.Show("软件已经在运行！！！", "信息提示：");
HandleRunningInstance(process);
}
else
{
Application.Run(new Form1());
}
//Application.Run(new Form1());
#endregion
}

#region 第一种方式
public static bool IsExistRunApplicationOrEXE()
{
Mutex mutex = new Mutex(true, "OnlyRunOneEXE", out bool isCreatedNew);
Process[] processArrs = Process.GetProcessesByName(Process.GetCurrentProcess().ProcessName);
if (processArrs.Length > 2 || !isCreatedNew)
{
return true;
}
return false;
}

#endregion

#region 第二种方式
[DllImport("User32.dll")]
private static extern bool ShowWindowAsync(IntPtr hWnd, int cmdShow);
[DllImport("User32.dll")]
private static extern bool SetForegroundWindow(IntPtr hWnd);

private static Process RunningInstance()
{
Process current = Process.GetCurrentProcess();
Process[] processes = Process.GetProcessesByName(current.ProcessName);
//遍历与当前进程名称相同的进程列表
foreach (Process process in processes)
{
//如果实例已经存在则忽略当前进程
if (process.Id != current.Id)
{
//保证要打开的进程同已经存在的进程来自同一文件路径
if (Assembly.GetExecutingAssembly().Location.Replace("/", @"\") == current.MainModule.FileName)
{
//返回已经存在的进程
return process;

}
}
}
return null;
}

private static void HandleRunningInstance(Process instance)
{
ShowWindowAsync(instance.MainWindowHandle, 1); //调用api函数，正常显示窗口
SetForegroundWindow(instance.MainWindowHandle); //将窗口放置最前端
}

//[DllImport("User32.dll")]
////返回值：如果窗口原来可见，返回值为非零；如果函数原来被隐藏，返回值为零。
//private static extern bool ShowWindowAsync(IntPtr hWnd, int cmdShow);
////API cmdShow 常数定义
//private const int SW_HIDE = 0;
//private const int SW_NORMAL = 1; //正常弹出窗体
//private const int SW_MAXIMIZE = 3; //最大化弹出窗体
//private const int SW_SHOWNOACTIVATE = 4;
//private const int SW_SHOW = 5;
//private const int SW_MINIMIZE = 6;
//private const int SW_RESTORE = 9;
//private const int SW_SHOWDEFAULT = 10;
#endregion
}
}