Dodaj ove dve metode:
Code:
private void listView1_ColumnWidthChanging(object sender, ColumnWidthChangingEventArgs e)
{
if (e.ColumnIndex == 0)
e.Cancel = true;
}
private void listView1_ColumnWidthChanged(object sender, ColumnWidthChangedEventArgs e)
{
if (e.ColumnIndex == 0 && listView1.Columns[0].Width != 50)
listView1.Columns[0].Width = 50;
}