Question

How do I setup a button click to remove only null contents from a listbox and keep the listbox populated.

Example:

Work  
Files  
here  

Armor

Result (on_button_click,changes listbox):

Work  
Files  
here  
Armor

Any help always appricated.

Answer 1

You need to loop backwards through the items in the ListBox and remove the items that you don’t like.

For example:

for (int i = listBox.Items.Count - 1; i >= 0; i--) {
    if (String.IsNullOrEmpty(listBox.Items[i] as String))
        listBox.Items.RemoveAt(i);
}

The loop needs to be backwards because otherwise, all of the upcoming indices will move down.