is it safe to read listview properties from other thread than UI thread?

Question

Hello I have a listview with a number of files to encode. I am using delegates and asynchronous invocation to call the encoding method. I would like to ask if it's safe to read (only read) the items from the listview from the new thread. I read an article from msdn that says: you must never use any member of a Control on any thread other than the one that created it. Does this apply here or is it safe to do it? thnx geo

spgilmore · Answer

You should always serialize access to outside-thread items from within the thread class. Write a function for each point of access that you will make and only access it via that function. private void UpdateProgress(int aprogress int amax) { lock { mainthread.progressbar.max = amax; mainthread.progressbar.progress = aprogress; } }

Mykonine · Answer

It's safe to do that but you'll have to be careful of how you use it. Don't access the same property multiple times in your method and expect that property to stay the same the whole time you use it unless you use some system for locking the properties while you're using them.