Bringing another process to front in WPF

Question

I have a WPF application. Inside the application during a button click I create a new process to open a new application like below code from my view model.

var process = Process.Start(binaryLocation
                                  + @"\TestApp.exe", powDBop + " " + mDBop);

processID = process.Id;

It works fine. Now the problem is if user clicks on the button again, I check whether the process is alive, and if it is alive I need to bring the Window of that application to the front .

For that I tried below code. But it is failing.

var winHandle = Process.GetProcessById(process.Id).MainWindowHandle;
HwndSource hwndSource = HwndSource.FromHwnd(winHandle);
var window = hwndSource.RootVisual as Window;
window.BringIntoView();
window.Activate();

hwndSource is not being set and remains null.

I even tried with below code and still window returns null.

var winHandle = Process.GetProcessById(process.Id).MainWindowHandle;
Window window = (Window) HwndSource.FromHwnd(winHandle).RootVisual;

Anyone?

Answer 1

I think you can do it with the following code

var process = Process.Start(binaryLocation
                                  + @"\TestApp.exe", powDBop + " " + mDBop);

  SetForegroundWindow(process.MainWindowHandle);

 [DllImport("user32.dll")]
 private static extern bool SetForegroundWindow(IntPtr hWnd);