Question

How do I check on the ListView, if I click on index 0 (top) then my button will be enabled, but if I click other than index 0 (1, 2, 3, …) the button will be disabled (i.e., Enabled = false).

This is my current code:

private void lstAntrianPasien_SelectedIndexChanged(object sender, EventArgs e)
{
    if (lstAntrianPasien.SelectedItems.Count > 0)
    {
        btnUbahStatus.Enabled = true;
    }
    else
    {
        btnUbahStatus.Enabled = false;
    }
}

Answer 1

You can use the SelectedIndices property:

btnUbahStatus.Enabled = lstAntrianPasien.SelectedIndices.Count == 1
                        && lstAntrianPasien.SelectedIndices[0] == 0;

Alternately, if you want the button to be enabled if the first item is selected, regardless of the selection state of the other items, you can use Contains():

btnUbahStatus.Enabled = lstAntrianPasien.SelectedIndices.Contains(0);