using Backgroundworker cancleAsync()

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i use this code:

C#

private void BW_DoWork(object sender, DoWorkEventArgs e)
       {
       
           if (BW.CancellationPending)
           {
               e.Cancel = true;
               return;
           }
               MainPage MP = new MainPage();
               MP.thisconnection.Open();
               MP.ShowDialog();

       }

but canclation button don't work.
How i can cancle operation before it's complete?

Posted 3-Aug-12 19:14pm

Hekmat90

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Christian Graus · Answer 1 · 2012-08-03T19:30:00

Setting the cancel property does nothing, unless your thread also checks the property and decides to stop processing. It's a way of sending a message, not a way to kill a thread no matter what it's doing ( and has half done at that point ). this allows you to deal with the object you're working on and perform any clean up code.

To be more specific, you need to press cancel the MOMENT your thread starts, for this code to work, because otherwise, MainPage is showing, and does not have access to the event args, again. You want to add a handler for the progress event, and call it regularly, then it is where you check this property.

_Amy · Answer 2 · 2012-08-03T19:37:00

Solution 2

Hi,
Refer the links below:
BackgroundWorker Threads and Supporting Cancel[^]
BackgroundWorker Class Sample for Beginners[^]

Check this[^] also...

--Amit

Posted 3-Aug-12 19:37pm

_Amy

Comments

_Amy 4-Aug-12 23:47pm

I don't know what is wrong withe people out here. simply downvoted my 5 answers. Where I did mistake?