Threading in windows application

Question

0.00/5 (No votes)

See more:

Hi,

I have a Main Form it contains a dock panel in which am loading the child forms.
I am getting the child form instance using reflection, where it takes time and freezes the Application. I have tried threading where i have created the instance using background worker and also normal threading. Time taken is due to fetching data from web services as well as binding the controls.

I am getting exception. Control created on one thread cannot be accessed on a control in different thread.

Can any one help me out.

Thanks in advance

Posted 20-Sep-10 1:04am

prem kumar

Add a Solution

4 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

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

E.F. Nijboer · Answer 1 · 2010-09-20T01:11:00

Solution 1

You have to use invoke from within other threads to control the ui elements. Have a look at the link

http://www.yoda.arachsys.com/csharp/threads/winforms.shtm[^]

Good luck!

Posted 20-Sep-10 1:11am

E.F. Nijboer

anshudutta · Answer 2 · 2010-09-20T01:13:00

What you are getting is a cross threading exception.

When you have a wo UI in two different threads, you cannot simply interchange data between them. You need to use delegate to interchage data.

For example If I have a Form A in Thread 1 and there I need data in another thread that I want to populate in Form A, I need to first create a delegate pointing to thread 2 and then use this.invoke to access that data.

Let me know if you need a code snippet.

sureshbalachander · Answer 3 · 2010-09-20T01:14:00

Solution 3

Hi,

Generally, one cannot access a form's control through a Thread. To access the form controls, use Delegates and try to do your process. This might solve your problem.

Regards,
Suresh

Posted 20-Sep-10 1:14am

sureshbalachander

Abhishek Sur · Answer 4 · 2010-09-20T01:15:00

Yes,

this is basically because of Thread affinity for each control. You cannot build a control any other thread than UI Thread.

so expose a method which only calls for data and use Reflection to load the form in UI thread. as there would be no web service call, the UI Will load quickly. Now create a separate thread and call the exposed method which might load the data for the form.

When the data is loaded correctly, you can bind the data to the UI Elements.
:thumbsup:

Threading in windows application

4 solutions

Solution 1

Solution 2

Solution 3

Solution 4

Add your solution here

Preview 0