废话少说直接上代码了:
#region 只允许一台主机上运行一个应用程序
private const int WS_SHOWNORMAL = 1;
[DllImport("User32.dll")]
private static extern bool ShowWindowAsync(IntPtr hWnd, int cmdShow);
[DllImport("User32.dll")]
private static extern bool SetForegroundWindow(IntPtr hWnd);
/// <summary>
/// 获取当前是否具有相同进程。
/// </summary>
/// <returns></returns>
public static Process GetRunningInstance()
{
Process current = Process.GetCurrentProcess();
Process[] processes = Process.GetProcessesByName(current.ProcessName);
//遍历正在有相同名字运行的例程
foreach (Process process in processes)
{
//忽略现有的例程
if (process.Id != current.Id)
//确保例程从EXE文件运行
if (System.Reflection.Assembly.GetExecutingAssembly().Location.Replace("/", "\\") == current.MainModule.FileName)
return process;
}
return null;
}
/// <summary>
/// 激活原有的进程。
/// </summary>
/// <param name="instance"></param>
public static void HandleRunningInstance(Process instance)
{
ShowWindowAsync(instance.MainWindowHandle, WS_SHOWNORMAL);
SetForegroundWindow(instance.MainWindowHandle);
}
#endregion*/
使用方法如下:
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
//Process instance = GetRunningInstance();
//if (instance == null)
//{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new MainForm());
}//else {
// SMSMsgBox.ShowMessage(" 您的程序已经在运行了!!");
//}