INTELLIGENT WORK FORUMS
FOR COMPUTER PROFESSIONALS

Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

manage thread to update UI Control

manage thread to update UI Control

(OP)
All, I'm working on an asp.net app.
I have (C#) pdf page validator that evaluates the number of pages in a pdf file and compares it to the number entered on a form (the form will create an xml file used to configure an order).
My problem is that the process to run the validator against a large pdf file takes long enough that I would need to run it on a separate thread; but I can't seem to update / reference controls on the main UI Thread. The last thing I tried was the following.

CODE

Task taskA = Task.Factory.StartNew(() => DoSomeWork(5000));
taskA.Wait(); 

I have also tried this

CODE

MainThread = SynchronizationContext.Current;
        if (MainThread == null) MainThread = new SynchronizationContext();

        MainThread.Send((object state) =>
        {
            //pdfPageStatus.Text = pdfPages.ToString() + " pages in PDF File Uploaded";
            pdfPageStatus.Text = " pages in PDF File Uploaded";
            pdfPageStatus.ForeColor = Color.Blue;
        }, null); 

David Pimental
(US, Oh)

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members!

Resources

Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close