WPF window not closing

Question

could you tell a beginner why this small WPF-application is not closing as intended after the WorkflowTerminated event fires? The used workflow just terminates immediately. (using a WPF application, .Net Framework 3.5)

public partial class MainWindow : Window { private WorkflowRuntime wfRuntime = new WorkflowRuntime(); public MainWindow() { InitializeComponent(); wfRuntime.WorkflowTerminated += (se, ev) => this.Close(); // this doesn't close the window wfRuntime.WorkflowCompleted += (se, ev) => this.Close(); } private void Window_Loaded(object sender, RoutedEventArgs e) { WorkflowInstance launcherWorkflow = wfRuntime.CreateWorkflow(typeof(InstallerWorkflow)); launcherWorkflow.Start(); } }

When setting a breakpoint in the terminated-eventhandler, is it even executed? — ZoolWay
– ZoolWay, Commented Apr 14, 2011 at 7:28
Good question by the way, this haunted me before and was very hard to figure, +1 — Teoman Soygul
– Teoman Soygul, Commented Apr 14, 2011 at 7:49

Teoman Soygul · Accepted Answer · 2011-04-14 07:43:15Z

6

Probably because the callback is on another thread. A basic workaround is to terminate the application altogether using Environment.Exit(1);

To call the close function on the UI thread you should use:

wfRuntime.WorkflowTerminated += (se, ev) => { // call back to the window to do the UI-manipulation this.Dispatcher.Invoke(DispatcherPriority.Normal, new Action(delegate() { this.Close(); })); };

edited Apr 14, 2011 at 7:43

answered Apr 14, 2011 at 7:31

Teoman Soygul

25.8k6 gold badges73 silver badges84 bronze badges

Sign up to request clarification or add additional context in comments.

7 Comments

nabulke Over a year ago

My Application object doesn't have an exit() method. Propably because it is an WPF application? I tried Application.Current.Shutdown() which doesn't help. Still doesn't close...

nabulke Over a year ago

How could I post the terminate event to the right thread (GUI thread)?

nabulke Over a year ago

Environment.Exit() works, the application is closing. But it feels kind of dirty ;-) Is there a cleaner way, to reach my goal (i.e. handling the event in the right thread, so Close() works as intended?). Nevertheless thanks for your help so far!

Teoman Soygul Over a year ago

Yep I updated the answer to callback the Close() method on the UI thread so UI windows closes right.

Teoman Soygul Over a year ago

Just fixed a typo by the way (forgot the second closing parenthesis before semicolon)

|

Collectives™ on Stack Overflow

WPF window not closing

1 Answer 1

7 Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

7 Comments

Linked

Related