VSTO multithreading problem

Question

Hi folks,

Currently I have implement a multithreading approach in my VSTO project, I used "ThreadPool.QueueUserWorkItem" to get a background thread to retrieve data from WCF service. and in background thread, I used "dispatcher.Invoke" to invoke UI rendering method from main UI thread. the "dispatcher" is define at main UI thread as "Dispatcher dispatcher = Dispatcher.CurrentDispatcher;"

But I encounter a issue that when there is more data (means there will be more loop), my application will hung up, and not responding. However this issue is not happen when I use single thread. 

Any idea about why use multithreading causes "not responding"?

Answer 1

what do you mean by 'there is more data (means there will be more loop)' ?

maybe show us some code that exhibits problem

Answer 2

my code is like:

foreach(Category c in categorylist)
{   foreach(SubCategory sc in scListInCategory)
   {

      foreach(SubSubCategory ssc in sscListInSubCategory)
      {

       }

  }

}

So, if there is more data, like more category, then there will be more loop count

Answer 3

show us code that exhibits hung ups