MultiSelect ListBox选择和取消选择事件

Question

I have a ListBox in winforms Application, now the business logic demands me to fire one function if an item in the List Box is Selected and fire another if an item in the List Box is Deselected.

But the way I see it none of the Events Listed in VS is giving that power of Execution. I do see Events like

SelectedIndexChanged(object sender, EventArgs e)

and

SelectedValueChanged(object sender, EventArgs e)

But both these event fires if there is a change in the selection of the ListBox. But it doesn't specify if an item was selected or deselected which raised the event.

Any suggestion on this would be very helpful.

I even found the following link on MSDN

https://msdn.microsoft.com/en-us/library/system.windows.controls.listboxitem.unselected%28v=vs.110%29.aspx

But I am not sure how to apply the same in this situation.

Answer 1

Posting the Tedious Solution. Might help some1 in the future to Copy Paste.

public static int ListCount;

        private void listBoxPackService_SelectedIndexChanged(object sender, EventArgs e)
        {
            int CurrCount;

            ListBox.SelectedObjectCollection col = listBoxPackService.SelectedItems;
            CurrCount = col.Count;

            if (CurrCount > ListCount)
            {
                //Item Selected

            }
            else
            {
                //Item DeSelected

               if(CurrCount == 0)
               {
                  //All Items Were Deselected
               }

            }

            ListCount = CurrCount;

        }

On load of the ListBox

ListCount = 0

rename the Controls as per your requirement.

I am still open for a better solution :)