Get the index of Item selected in ListView

If you are using the .NET Compact Framework, SelectedIndex is not supported. For a general solution, I prefer SelectedIndices:

ListView.SelectedIndexCollection indices = lst.SelectedIndices;
if (indices.Count > 0)
{
    // Do something with indices[0]
}

For Visual Studio 2015, SelectedIndex does not seem to be available. Instead, you can use SelectedIndices[x] where x=0 will give you the first selected item:

listView.SelectedIndices[0]

You can also set the MultipleSelect property to false to only allow one item to be selected at a time.

You can get SelectedIndex from listView. No need to traverse over all items because as per your code you seems to be interested in index of any selected item.

var2 = ListView1.SelectedIndex;

OR

simply this will work if interested in only first index:

if (lst.SelectedItems.Count > 0)
{
    var2 = lst.Items.IndexOf(lst.SelectedItems[0]);
}