Sometimes we just want our program to open only one instance, that our software is opened only once. Then we can pass a way of knowing, before the software is not opened a open, not closed. That is, if there is another program is running.
The following is a simple method
// 确保不存在程序的其他实例
singleInstanceWatcher = new Semaphore(
0, // Initial count.
1, // Maximum count.
Assembly.GetExecutingAssembly().GetName().Name, out createdNew);
if (createdNew)
{
//之前没有运行过
}
else
{
//重复运行
MessageBox.Show("请不要重复运行(ノ｀Д)ノ");
Environment.Exit(-2);
}
Another method
string mutexName = Properties.Resources.ProgramTitle + "Mutex";
singleInstanceWatcher = new Mutex(false, mutexName, out createdNew);
if (!createdNew)
{
MessageBox.Show("程序已经运行!", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
Environment.Exit(-1);
}
bool createdNew;
System.Threading.Mutex instance = new System.Threading.Mutex(true, "MutexName", out createdNew);
if (createdNew)
{
Application.Run(new LoginForm());
instance.ReleaseMutex();
}
else
{
Application.Exit();
}
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