C# 只允许开启一个exe程序
第一种方法
电脑只能启动一次再次点击显示当前exe程序
csharp
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Runtime.InteropServices;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace BulletinBoard
{
static class Program
{
[DllImport("user32.dll", EntryPoint = "SetForegroundWindow")]
public static extern int SetForegroundWindow(IntPtr hwnd);
[DllImport("user32.dll", EntryPoint = "SendMessage")]
public static extern int SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);
public const int WM_SYSCOMMAND = 0x112;
public const int SC_RESTORE = 0xF120;
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Process cur = Process.GetCurrentProcess();
foreach (Process p in Process.GetProcesses())
{
if (p.Id == cur.Id) continue;
if (p.ProcessName == cur.ProcessName)
{
SetForegroundWindow(p.MainWindowHandle);
SendMessage(p.MainWindowHandle, WM_SYSCOMMAND, SC_RESTORE, 0);
return;
}
}
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
}
}
第二种方法
电脑只能启动一次再次点击重新启动exe程序
csharp
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Runtime.InteropServices;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace BulletinBoard
{
static class Program
{
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Process current = Process.GetCurrentProcess();
Process[] pp = Process.GetProcessesByName(current.ProcessName);
foreach(Process p in pp)
{
if (p.Id != current.Id)
{
if (p.MainModule.FileName == current.MainModule.FileName)
{
p.Kill();
break;
}
}
}
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
}
}