public void ShowSortOnHeader(int column, SortOrder order)
{
IntPtr headersHwnd = NativeMethods.SendMessage(this.Handle, NativeMethods.LVM_GETHEADER, IntPtr.Zero, IntPtr.Zero);
for (int processCols = 0; processCols <= this.Columns.Count; processCols++)
{
NativeMethods.HDITEM headerInfo = default(NativeMethods.HDITEM);
headerInfo.mask = NativeMethods.HDI_FORMAT;
NativeMethods.SendMessage(headersHwnd, NativeMethods.HDM_GETITEM, (IntPtr)processCols, ref headerInfo);
if (order != SortOrder.None && processCols == column)
{
switch (order)
{
case SortOrder.Ascending:
headerInfo.fmt = headerInfo.fmt & ~NativeMethods.HDF_SORTDOWN;
headerInfo.fmt = headerInfo.fmt | NativeMethods.HDF_SORTUP;
break;
case SortOrder.Descending:
headerInfo.fmt = headerInfo.fmt & ~NativeMethods.HDF_SORTUP;
headerInfo.fmt = headerInfo.fmt | NativeMethods.HDF_SORTDOWN;
break;
}
}
else
{
headerInfo.fmt = headerInfo.fmt & ~NativeMethods.HDF_SORTDOWN & ~NativeMethods.HDF_SORTUP;
}
NativeMethods.SendMessage(headersHwnd, NativeMethods.HDM_SETITEM, (IntPtr)processCols, ref headerInfo);
}
}
public void ShowSortOnHeader(int column, SortOrder order)
{
IntPtr headersHwnd = NativeMethods.SendMessage(this.Handle, NativeMethods.LVM_GETHEADER, IntPtr.Zero, IntPtr.Zero);
for (int processCols = 0; processCols <= this.Columns.Count; processCols++)
{
NativeMethods.HDITEM headerInfo = new NativeMethods.HDITEM();
headerInfo.mask = NativeMethods.HDI_FORMAT;
NativeMethods.SendMessage(headersHwnd, NativeMethods.HDM_GETITEM, (IntPtr)processCols, ref headerInfo);
if (order != SortOrder.None && processCols == column)
{
switch (order)
{
case SortOrder.Ascending:
headerInfo.fmt = headerInfo.fmt & ~NativeMethods.HDF_SORTDOWN;
headerInfo.fmt = headerInfo.fmt | NativeMethods.HDF_SORTUP;
break;
case SortOrder.Descending:
headerInfo.fmt = headerInfo.fmt & ~NativeMethods.HDF_SORTUP;
headerInfo.fmt = headerInfo.fmt | NativeMethods.HDF_SORTDOWN;
break;
}
}
else
{
headerInfo.fmt = headerInfo.fmt & ~NativeMethods.HDF_SORTDOWN & ~NativeMethods.HDF_SORTUP;
}
NativeMethods.SendMessage(headersHwnd, NativeMethods.HDM_SETITEM, (IntPtr)processCols, ref headerInfo);
}
}
