Slow Event affecting Refresh

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Should be a simple answer to this one.

I have a program where I can select different items on a control. I also want my propertygrid to update with the new selected item.

Only problem is that I am using a WPF propertygrid and it takes a fraction of a sec to update. This update delays the updating of the item control. I have tried Threading, but I get an error in my propertygrid, something about being on a different thread. I could wait until after my item control has refreshed to call the event to update the propertygrid but it would not be a tidy solution for me.

Any ideas on how I could update the propertygrid without having its delay affecting the time to update the item control?

Posted 24-Jun-11 21:46pm

viciouskinid

Updated 25-Jun-11 15:35pm

Deeksha Shenoy

v3

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Mark Salsbery 25-Jun-11 11:26am

What is the source of the delay? How are you doing the update - through a binding?

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Solution 2

As you are working with WPF, the problem has can be solved using DispatcherSynchronizationContext - as shown in the asnwer to this posting:
http://stackoverflow.com/questions/1949789/using-synchronizationcontext-for-sending-events-back-to-the-ui-for-winforms-or-wp[^]

Best regards
Espen Harlinn

Posted 25-Jun-11 5:25am

Espen Harlinn

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Sergey Alexandrovich Kryukov 25-Jun-11 19:26pm

Very good discussion referenced. My 5. I want to note, however, that the real solution offered is to use Dispatcher.BeginInvoke (or Invoke) and not Synchronization Context -- exactly what we advised many times.

Yet another advice -- please see my solution.
--SA

Espen Harlinn 26-Jun-11 4:38am

Thank you, SAKryukov!

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Sergey Alexandrovich Kryukov · Accepted Answer · 2011-06-25T13:24:00

You need to use the method Invoke or BeginInvoke of System.Windows.Threading.Dispatcher (for both Forms or WPF) or System.Windows.Forms.Control (Forms only).

You will find detailed explanation of how it works and code samples in my past answers:
Control.Invoke() vs. Control.BeginInvoke()[^],
Problem with Treeview Scanner And MD5[^].

See also more references on threading:
How to get a keydown event to operate on a different thread in vb.net[^],
Control events not firing after enable disable + multithreading[^].

—SA