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GeneralRe: UI not updating Pin
#realJSOP29-Mar-21 23:33
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GeneralRe: UI not updating Pin
Richard Deeming29-Mar-21 21:36
mveRichard Deeming29-Mar-21 21:36 
GeneralRe: UI not updating Pin
#realJSOP29-Mar-21 23:42
mva#realJSOP29-Mar-21 23:42 
GeneralRe: UI not updating Pin
Richard Deeming30-Mar-21 0:05
mveRichard Deeming30-Mar-21 0:05 
GeneralRe: UI not updating Pin
#realJSOP30-Mar-21 5:12
mva#realJSOP30-Mar-21 5:12 
GeneralRe: UI not updating Pin
#realJSOP30-Mar-21 12:14
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GeneralRe: UI not updating Pin
#realJSOP30-Mar-21 14:26
mva#realJSOP30-Mar-21 14:26 
QuestionImpossible? Get instance of MainWindow from extern WPF-application Pin
Mc_Topaz22-Mar-21 14:05
MemberMc_Topaz22-Mar-21 14:05 
I have two WPF-applications. Let's call them A and B.

In A I wan't to start B as a new process and get the instance of B's MainWindow to further gain access of the controls in B.

When A has started it sets up an instance of the Process class to start B. The instance is kept in A to help in any other way to access or terminate B.

In A I have a StartB method and a GetB method:
public partial class MainWindow : Window
{
    Process Process { get; set; }
        
    public MainWindow()
    {
        InitializeComponent();
    }

    private void Window_Loaded(object sender, RoutedEventArgs e)
    {
        StartB();
        GetB();
    }

    void StartB()
    {
        var path = @"C:\Some\Path\To\B.exe";
        var info = new ProcessStartInfo(path);
        Process = new Process();
        Process.StartInfo = info;
        Process.Start();
    }

    void GetB()
    {
        var title = Process.MainWindowTitle;
        var visual = System.Windows.Interop.HwndSource.FromHwnd(Process.MainWindowHandle);
        var window = visual.RootVisual as Window;
    }
}
The StartB method works. But the GetB method don't work.

This line in GetB returns null:
var visual = System.Windows.Interop.HwndSource.FromHwnd(Process.MainWindowHandle);


I have googled and I found somewhere that the call to System.Windows.Interop.HwndSource.FromHwnd should work, but it didn't.

Is there a solution for this?


Best regards,
Stefan
AnswerRe: Impossible? Get instance of MainWindow from extern WPF-application Pin
Richard Deeming22-Mar-21 22:40
mveRichard Deeming22-Mar-21 22:40 
GeneralRe: Impossible? Get instance of MainWindow from extern WPF-application Pin
Mc_Topaz23-Mar-21 4:02
MemberMc_Topaz23-Mar-21 4:02 
AnswerRe: Impossible? Get instance of MainWindow from extern WPF-application Pin
Gerry Schmitz23-Mar-21 7:27
mveGerry Schmitz23-Mar-21 7:27 
GeneralRe: Impossible? Get instance of MainWindow from extern WPF-application Pin
Mc_Topaz23-Mar-21 12:22
MemberMc_Topaz23-Mar-21 12:22 
GeneralRe: Impossible? Get instance of MainWindow from extern WPF-application Pin
Richard Deeming23-Mar-21 23:14
mveRichard Deeming23-Mar-21 23:14 
GeneralRe: Impossible? Get instance of MainWindow from extern WPF-application Pin
Gerry Schmitz24-Mar-21 5:40
mveGerry Schmitz24-Mar-21 5:40 
GeneralRe: Impossible? Get instance of MainWindow from extern WPF-application Pin
Mc_Topaz25-Mar-21 0:02
MemberMc_Topaz25-Mar-21 0:02 
QuestionWPF DataGrid Custom Group Header Pin
Kevin Marois22-Mar-21 8:47
professionalKevin Marois22-Mar-21 8:47 
AnswerRe: WPF DataGrid Custom Group Header Pin
Richard Deeming22-Mar-21 22:35
mveRichard Deeming22-Mar-21 22:35 
QuestionDynamic WPF DataGrid Pin
Kevin Marois19-Mar-21 10:41
professionalKevin Marois19-Mar-21 10:41 
AnswerRe: Dynamic WPF DataGrid Pin
Richard Deeming21-Mar-21 22:50
mveRichard Deeming21-Mar-21 22:50 
GeneralRe: Dynamic WPF DataGrid Pin
Kevin Marois22-Mar-21 7:07
professionalKevin Marois22-Mar-21 7:07 
GeneralRe: Dynamic WPF DataGrid Pin
Kevin Marois23-Mar-21 9:58
professionalKevin Marois23-Mar-21 9:58 
GeneralRe: Dynamic WPF DataGrid Pin
Richard Deeming23-Mar-21 23:13
mveRichard Deeming23-Mar-21 23:13 
GeneralRe: Dynamic WPF DataGrid Pin
Kevin Marois24-Mar-21 6:14
professionalKevin Marois24-Mar-21 6:14 
QuestionWPF with TPL Multithreading Pin
#realJSOP16-Mar-21 6:04
mva#realJSOP16-Mar-21 6:04 
AnswerRe: WPF with TPL Multithreading Pin
Gerry Schmitz16-Mar-21 7:45
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