| public static Process RunningInstance() |
| Process current = Process.GetCurrentProcess(); |
Process[] processes = Process.GetProcessesByName (current.ProcessName);
|
| //Loop through the running processes in with the same name |
| 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. |
| //No other instance was found, return null. |
| Public Shared Function RunningInstance() As Process |
| Dim current As Process = Process.GetCurrentProcess() |
| Dim processes As Process() = Process.GetProcessesByName(current.ProcessName) |
| 'Loop through the running processes in with the same name |
| For Each process In processes |
| 'Ignore the current process |
| If process.Id <> current.Id Then |
| 'Make sure that the process is running from the exe file. |
| If [Assembly].GetExecutingAssembly().Location.Replace("/", "/") = current.MainModule.FileName Then |
| 'Return the other process instance. |
| 'No other instance was found, return null. |
| End Function 'RunningInstance |
如果检测到已有窗体实例,将此实例显示出来参考:
[STAThread]
static void Main()
{
//Get the running instance.
Process instance = RunningInstance();
if (instance == null)
{
//There isn't another instance, show our form.
Application.Run (new Form2());
}
else
{
//There is another instance of this process.
HandleRunningInstance(instance);
}
}
public static Process RunningInstance()
{
Process current = Process.GetCurrentProcess();
Process[] processes = Process.GetProcessesByName (current.ProcessName);
//Loop through the running processes in with the same name
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;
}
}
}
//No other instance was found, return null.
return null;
}
public static void HandleRunningInstance(Process instance)
{
//Make sure the window is not minimized or maximized
ShowWindowAsync (instance.MainWindowHandle , WS_SHOWNORMAL);
//Set the real intance to foreground window
SetForegroundWindow (instance.MainWindowHandle);
}
[DllImport("User32.dll")]
private static extern bool ShowWindowAsync( IntPtr hWnd, int cmdShow);
[DllImport("User32.dll")]
private static extern bool SetForegroundWindow(IntPtr hWnd);
private const int WS_SHOWNORMAL = 1 |
来源：http://blog.csdn.net/acewang/archive/2004/02/05/17627.aspx