Multi-Threading and Listbox

Question

What I'm trying to do is get and remove the first item in a listbox with multiple threads, though I need to keep the threads from using the same item.

Ex: Thread 1 and 2 both grab 1, and attempt to remove 1, but in the process, both threads use the same variable, and both 1 and 2 are removed since I'm using removeat(0).

Listbox for Ex

1

2

How would I go about managing the threads so that they don't use / remove the wrong variables?

Answer 1

You can search the particular item in the list and remove it.............

 foreach (string item in toRemove)
 {
   listbox.Remove(item);
 }

OR.........

If you are assigning a datasource to it then add one more UNIQUE column like Primary Key and on the basis of that unique column you can remove item from LISTBOX

Answer 2

You could lock the threads on a reference (maybe the list ?) for the whole process of

1. Finding the item
2. removing the item if it was found

HTH

Answer 3

Use Lock when you access your listbox items. Use the same object for locking everywhere.

http://msdn.microsoft.com/en-us/library/c5kehkcz%28v=vs.80%29.aspx