默认情况下 WPF应用是能够多开的,但是大部分情况下我们只想打开一个实例,这就有两种情况
protected override void OnStartup(StartupEventArgs e)
{
base.OnStartup(e);
CheckProcess();
}
[DllImport("User32.dll")]
private static extern int FindWindow(string className, string windowName);
[DllImport("user32.dll")]
public static extern bool SetForegroundWindow(int hWnd);
private static void CheckProcess()
{
Console.WriteLine(@"程序启动");
Process current = Process.GetCurrentProcess();
//获取欲启动进程名
string strProcessName = Process.GetCurrentProcess().ProcessName;
var processList = Process.GetProcessesByName(strProcessName);
if (processList.Length > 1)
{
MessageWindow.Show("当前程序已在运行,请勿重复运行。");
foreach (var process in processList)
{
if (process.Id == current.Id) continue;
int hWnd = FindWindow(null, process.MainWindowTitle);
SetForegroundWindow(hWnd);
}
Environment.Exit(1); //退出程序
}
}
protected override void OnStartup(StartupEventArgs e)
{
base.OnStartup(e);
CheckProcess();
}
/// <summary>
/// 结束已运行的程序
/// </summary>
private static void CheckProcess()
{
Process current = Process.GetCurrentProcess();
Process[] processList = Process.GetProcesses();
foreach (Process process in processList)
{
if (process.ProcessName == Process.GetCurrentProcess().ProcessName)
{
if (process.Id != current.Id) //忽略当前进程
{
try
{
process.Kill(); //结束进程
}
catch (Exception)
{
// ignored
}
}
}
}
}