/// <summary>
/// 从这里开始运行
/// </summary>
[STAThread]
static void Main()
{
Process instance = RunningInstance();
if (instance == null)
{
//没有实例在运行
WeatherApp appInstance = new WeatherApp();
appInstance.StartMainGui();
}
else
{
//已经有一个实例在运行
HandleRunningInstance(instance);
}
}
#region 确保只有一个实例
public 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)
{
//Ignore the current process
if (process.Id != current.Id)
{
//Make sure that the process is running from the exe file.
if (Assembly.GetExecutingAssembly().Location.Replace("/", "\\") == current.MainModule.FileName)
{
//Return the other process instance.
return process;
}
}
}
return null;
}
private static void HandleRunningInstance(Process instance)
{
MessageBox.Show("该应用系统已经在运行！", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Information);
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")]
private static extern bool ShowWindowAsync(System.IntPtr hWnd, int cmdShow);
[DllImport("User32.dll")]
private static extern bool SetForegroundWindow(System.IntPtr hWnd);
#endregion