/// <summary> Sets the sort arrow to a particular column in the list view. </summary>
/// <param name="ColumnToShowArrow"> Index of the column where the sort arrow will be displayed </param>
public void SetSortArrow( int ColumnToShowArrow, bool bSortModeAscending )
{
if( ListViewHeader == null )
{
return;
}
IntPtr ColumnHeader = ListViewHeader.Handle;
for( int ColumnIndex = 0; ColumnIndex < Columns.Count; ColumnIndex++ )
{
IntPtr ColumnPtr = new IntPtr( ColumnIndex );
Win32.HDITEM ListViewColumn = new Win32.HDITEM();
ListViewColumn.mask = Win32.HDI_FORMAT;
Win32.SendMessageHeaderItem( ColumnHeader, Win32.HDM_GETITEM, ColumnPtr, ref ListViewColumn );
bool bIsSortArrowDown = ( ( ListViewColumn.fmt & Win32.HDF_SORTDOWN ) == Win32.HDF_SORTDOWN );
bool bIsSortArrowUp = ( ( ListViewColumn.fmt & Win32.HDF_SORTUP ) == Win32.HDF_SORTUP );
// Change the sort arrow to opposite direction.
if( ColumnToShowArrow == ColumnIndex )
{
if( bSortModeAscending )
{
ListViewColumn.fmt &= ~Win32.HDF_SORTDOWN;
ListViewColumn.fmt |= Win32.HDF_SORTUP;
}
else
{
ListViewColumn.fmt &= ~Win32.HDF_SORTUP;
ListViewColumn.fmt |= Win32.HDF_SORTDOWN;
}
}
else
{
ListViewColumn.fmt &= ~Win32.HDF_SORTDOWN & ~Win32.HDF_SORTUP;
}
Win32.SendMessageHeaderItem( ColumnHeader, Win32.HDM_SETITEM, ColumnPtr, ref ListViewColumn );
}
}
/// <summary> Sets the sort arrow to a particular column in the list view. </summary>
/// <param name="ColumnToShowArrow"> Index of the column where the sort arrow will be displayed </param>
public void SetSortArrow(int ColumnToShowArrow, bool bSortModeAscending)
{
if (ListViewHeader == null)
{
return;
}
IntPtr ColumnHeader = ListViewHeader.Handle;
for (int ColumnIndex = 0; ColumnIndex < Columns.Count; ColumnIndex++)
{
IntPtr ColumnPtr = new IntPtr(ColumnIndex);
Win32.HDITEM ListViewColumn = new Win32.HDITEM();
ListViewColumn.mask = Win32.HDI_FORMAT;
Win32.SendMessageHeaderItem(ColumnHeader, Win32.HDM_GETITEM, ColumnPtr, ref ListViewColumn);
bool bIsSortArrowDown = ((ListViewColumn.fmt & Win32.HDF_SORTDOWN) == Win32.HDF_SORTDOWN);
bool bIsSortArrowUp = ((ListViewColumn.fmt & Win32.HDF_SORTUP) == Win32.HDF_SORTUP);
// Change the sort arrow to opposite direction.
if (ColumnToShowArrow == ColumnIndex)
{
if (bSortModeAscending)
{
ListViewColumn.fmt &= ~Win32.HDF_SORTDOWN;
ListViewColumn.fmt |= Win32.HDF_SORTUP;
}
else
{
ListViewColumn.fmt &= ~Win32.HDF_SORTUP;
ListViewColumn.fmt |= Win32.HDF_SORTDOWN;
}
}
else
{
ListViewColumn.fmt &= ~Win32.HDF_SORTDOWN & ~Win32.HDF_SORTUP;
}
Win32.SendMessageHeaderItem(ColumnHeader, Win32.HDM_SETITEM, ColumnPtr, ref ListViewColumn);
}
}