删除和插入新列后，ListView 项目不会更改

Question

I have a ListBox filled with a few items, in the SelectedIndexChanged event i tend to remove any existent extra Columns (ID 1 and bigger), after that, i create a new Column and add Items all over again, but the previous Items stay intact, it's like the Add() overload is not working, here is my code:

if (listBox1.SelectedItems.Count > 0)
        {
            if (listView2.Columns.Count > 1)
            {
                int bla = listView2.Columns.Count;
                for (int i = 1; i < bla; i++)
                {
                    //MessageBox.Show("Removing Column: " + (bla - i));
                    listView2.Columns.RemoveAt(bla - i);
                }
            }

            if (clmnnum[listBox1.SelectedIndex] == 1)
            {
                listView2.SuspendLayout();
                listView2.Columns.Add("Primary Values", 90, HorizontalAlignment.Left);
                listView2.ResumeLayout();
                listView2.Items[0].SubItems.Add(exp[listBox1.SelectedIndex].ToString());
                listView2.Items[1].SubItems.Add(hpe[listBox1.SelectedIndex].ToString());
                listView2.Items[2].SubItems.Add(lve[listBox1.SelectedIndex].ToString());
                listView2.Items[3].SubItems.Add(stre[listBox1.SelectedIndex].ToString());
                listView2.Items[4].SubItems.Add(powe[listBox1.SelectedIndex].ToString());
                listView2.Items[5].SubItems.Add(ende[listBox1.SelectedIndex].ToString());
            }
        }

The ListBox contains as many items as there are in each Array(clmnnum,exp,hpe,etc...)

Answer 1

I'm not entirely sure what the problem is here, you say the Add overload doesn't appear to be working yet you state the problem is the old items are remaining, at least I assume that's what you mean by "the previous items stay intact."

If I understand what you are attempting to do, I would encourage you to clear listView2's items, and have a function to build listView2 as you would like it from nothing each time.

It should at least give you an idea as to what is happening.