How to handle progressbar over Dispatcher.Invoke

Question

1.00/5 (1 vote)

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Hi,
My progressbar get stuck when i call

Dispatcher.Invoke

.

Please consider following code snippet.

C#

private void DoWork()
        {
            Progressbar.show();//Displays progress bar
            System.Windows.Application.Current.Dispatcher.Invoke((Action)delegate
            {
                Function1();//Takes 1 min to execute
            });
            Progressbar.close();//Closes progress bar
        }

I have DoWork() method which displays progressbar and after that there is Dispatcher.Invoke method for modifying UI control.
As finction Function1() inside Dispatcher.Invoke takes long time to finish. So while executing Dispatcher.Invoke, it stops progress of progressbar.
Please tell me how I shall show progress bar so that it will not stop while executing Dispatcher.Invoke

Posted 27-May-15 17:56pm

RhishikeshLathe

Updated 27-May-15 17:58pm

v2

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Comments

Sergey Alexandrovich Kryukov 28-May-15 0:46am

Totally wrong. This is not what dispatcher is used for. Dispatcher is used to notify UI thread. Long method should be just called in the non-UI thread, and each update to the UI should be under Invoke.
—SA

RhishikeshLathe 28-May-15 1:02am

Actually Invoke is filling the datagrid from database so it is taking long time.

3 solutions

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Sergey Alexandrovich Kryukov · Answer 1 · 2015-05-27T18:50:00

Please see my comment to the question. I have no gut to explain how wrong is what you do and how irrelevant is the "solution" Solution 1.

Just see my past answer and the answers referenced there: .NET event on main thread[^].

You are lost so much that I cannot be sure that you can understand my explanations, but please just try, ask some follow-up questions in case of doubt.

—SA

Jitesh Hirani · Answer 2 · 2015-05-27T22:42:00

Solution 3

Instead of Use Background Worker when u have to show progressbar and do some work in background.

See link
https://msdn.microsoft.com/en-us/library/cc221403(v=vs.95).aspx

Posted 27-May-15 22:42pm

Jitesh Hirani

Balav4 · Answer 3 · 2015-05-27T18:09:00

Solution 1

Hi Try this

C#

Dispatcher.Invoke(DispatcherPriority.Normal, (Action)delegate()
            {   
                string text = textbox1.Text;
            });

Posted 27-May-15 18:09pm

Balav4