Click here to Skip to main content
15,886,724 members
Search within:


How to update the GUI Controls from Background Worker process in c#?
Please Sign up or sign in to vote.
0.00/5 (No votes)
See more:
C#
How to update the GUI Controls from Background Worker process in c#?
Posted
Add a Solution

2 solutions

You cannot call anything related to UI from non-UI thread. Instead, 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
 
Share this answer
 
Posted
to update UI controls from background thread you need to use the Dispatcher of UI - Window and invoke it like
C#
_preShellWindow.Dispatcher.Invoke(System.Windows.Threading.DispatcherPriority.Render, new Action(() =>
             { 
MessageBox.Show("Hii");
}));


Also you can call Update Layout base on your requirement
C#
this.Dispatcher.Invoke(DispatcherPriority.Render, (Action)delegate()
              {
                  InvalidateArrange();
                  InvalidateVisual();
                  InvalidateMeasure();
                  UpdateLayout();
              });
 
Share this answer
 
Posted
Comments
Sergey Alexandrovich Kryukov 25-Jun-15 2:58am    
How do you know that the inquirer uses WPF? How do you know that all those invalidates should be done, not anything else? If could be millions different things the inquirer tries to do, which you are totally unaware of. How do you know that parameterless Action should be used because no parameters are to be passed? What's the use of such code sample? It is totally arbitrary, makes no sense. You did not try to explain anything...

Besides, the turn "background thread" has nothing to do with the issue. It's only important that this is not a UI thread. Please read on the foreground and background threads, it's important to know; and you don't have a clue.

—SA
Add a Solution

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

  Print Answers RSS
Top Experts
Last 24hrsThis month
Related Questions
Background worker process
Update Label Content in background worker
Background worker repeat process
c# Background worker process problem
Background worker process
Adding treenode using background worker
[Not a question] background workers / threading
vb.net timer and background worker
C# Progress Bar Background Worker
Background worker compiling problem

Advertise
Privacy
Cookies
Terms of Use
Last Updated 25 Jun 2015
Layout: fixed | fluid
Copyright © CodeProject, 1999-2024
All Rights Reserved.

Web02 2.8:2024-04-02:1

CodeProject, 20 Bay Street, 11th Floor Toronto, Ontario, Canada M5J 2N8 +1 (416) 849-8900