public static void SetSortIcon(this ListView listViewControl, int columnIndex, SortOrder order)
{
IntPtr hWnd = ListViewExtensions.SendMessage(listViewControl.Handle, 4127U, IntPtr.Zero, IntPtr.Zero);
for (int index = 0; index <= listViewControl.Columns.Count - 1; ++index)
{
IntPtr wParam = new IntPtr(index);
ListViewExtensions.HDITEM lParam = new ListViewExtensions.HDITEM()
{
mask = ListViewExtensions.HDITEM.Mask.Format
};
if (ListViewExtensions.SendMessage(hWnd, 4619U, wParam, ref lParam) == IntPtr.Zero)
{
throw new Win32Exception();
}
if (order != SortOrder.None && index == columnIndex)
{
switch (order)
{
case SortOrder.Ascending:
lParam.fmt &= ~ListViewExtensions.HDITEM.Format.SortDown;
lParam.fmt |= ListViewExtensions.HDITEM.Format.SortUp;
break;
case SortOrder.Descending:
lParam.fmt &= ~ListViewExtensions.HDITEM.Format.SortUp;
lParam.fmt |= ListViewExtensions.HDITEM.Format.SortDown;
break;
}
}
else
{
lParam.fmt &= ~(ListViewExtensions.HDITEM.Format.SortDown | ListViewExtensions.HDITEM.Format.SortUp);
}
if (ListViewExtensions.SendMessage(hWnd, 4620U, wParam, ref lParam) == IntPtr.Zero)
{
throw new Win32Exception();
}
}
}
public static extern IntPtr SendMessage(IntPtr hWnd, uint msg, IntPtr wParam, ref ListViewExtensions.HDITEM lParam);