public static void SetSortIcon(this ListView listView, int columnIndex, SortOrder order)
{
IntPtr columnHeader = SendMessage(listView.Handle, LVM_GETHEADER, IntPtr.Zero, IntPtr.Zero);
for (int columnNumber = 0; columnNumber < listView.Columns.Count; columnNumber++)
{
IntPtr columnPtr = new IntPtr(columnNumber);
LVCOLUMN lvColumn = new LVCOLUMN();
lvColumn.mask = HDI_FORMAT;
SendMessageLVCOLUMN(columnHeader, HDM_GETITEM, columnPtr, ref lvColumn);
if (order != SortOrder.None && columnNumber == columnIndex)
{
switch (order)
{
case System.Windows.Forms.SortOrder.Ascending:
lvColumn.fmt &= ~HDF_SORTDOWN;
lvColumn.fmt |= HDF_SORTUP;
break;
case System.Windows.Forms.SortOrder.Descending:
lvColumn.fmt &= ~HDF_SORTUP;
lvColumn.fmt |= HDF_SORTDOWN;
break;
}
lvColumn.fmt |= (HDF_LEFT | HDF_BITMAP_ON_RIGHT);
}
else
{
lvColumn.fmt &= ~HDF_SORTDOWN & ~HDF_SORTUP & ~HDF_BITMAP_ON_RIGHT;
}
SendMessageLVCOLUMN(columnHeader, HDM_SETITEM, columnPtr, ref lvColumn);
}
}
private static extern IntPtr SendMessageLVCOLUMN(IntPtr hWnd, int Msg, IntPtr wParam, ref LVCOLUMN lPLVCOLUMN);
