OpenFileDialog - selecting same file twice

Question

I am developing a windows forms application which uses OpenFileDialog to select files and drop it to a ListView.

The user should not be able to add same file to the listview twice. This should NOT happen:

How can this be done??

Answer 1

Try out this code.

if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
    var file = openFileDialog1.FileName;
    if (listView1.FindItemWithText(file) == null)
        listView1.Items.Add(file);
}

You can also add else with a message box informing user about choosing a duplicate file.