通过一个可能从多个线程触发的事件处理程序更新Winform ListView控件

Question

I have a "Win Form" application which listening to an event that may be raised from some different threads.

on that event i want to update a "List View" control. of course that i may need to use Invoke but my question is: Should i use lock on the function i will build to update the "List View" control or not?

Be a ware that i am updating the List View only by one function in the form and by only one event but more than one thread may raise the same event.

is it true that all the events that may be fired from all the threads will be handled by the main thread only so they will be executed one by one?

Thanks.

Answer 1

If you think the event could be fired at the same time from multiple threads, or at least get fired again before finishing the update then yes you should lock.

Something simple like:

lock(myListView) {
  updateMyListView();
}

should be enough. Locking on the list view object should still let you edit it.

A word of warning, this won't keep other things from editing the list view, only code that has it's own lock(myListView) block will pay attention to the lock.