/// <summary>
/// The set sort icon.
/// </summary>
/// <param name="listViewControl">
/// The list view control.
/// </param>
/// <param name="columnIndex">
/// The column index.
/// </param>
/// <param name="order">
/// The order.
/// </param>
/// <exception cref="Win32Exception">
/// </exception>
public static void SetSortIcon(this ListView listViewControl, int columnIndex, SortOrder order)
{
IntPtr columnHeader = NativeMethods.SendMessage(listViewControl.Handle, (int)W32_LVM.LVM_GETHEADER, IntPtr.Zero, IntPtr.Zero);
for (int columnNumber = 0; columnNumber <= listViewControl.Columns.Count - 1; columnNumber++)
{
var columnPtr = new IntPtr(columnNumber);
var item = new HDITEM { mask = W32_HDI.HDI_FORMAT };
if (NativeMethods.SendMessage(columnHeader, (int)W32_HDM.HDM_GETITEMW, columnPtr, ref item) == IntPtr.Zero)
{
throw new Win32Exception();
}
if (order != SortOrder.None && columnNumber == columnIndex)
{
switch (order)
{
case SortOrder.Ascending:
item.fmt &= ~W32_HDF.HDF_SORTDOWN;
item.fmt |= W32_HDF.HDF_SORTUP;
break;
case SortOrder.Descending:
item.fmt &= ~W32_HDF.HDF_SORTUP;
item.fmt |= W32_HDF.HDF_SORTDOWN;
break;
}
}
else
{
item.fmt &= ~W32_HDF.HDF_SORTDOWN & ~W32_HDF.HDF_SORTUP;
}
if (NativeMethods.SendMessage(columnHeader, (int)W32_HDM.HDM_SETITEMW, columnPtr, ref item) == IntPtr.Zero)
{
throw new Win32Exception();
}
}
}
public static extern int SendMessage(IntPtr hWnd, W32_HDM msg, int wParam, ref HDITEM hditem);
public static extern IntPtr SendMessage(IntPtr hWnd, uint msg, IntPtr wParam, ref HDITEM lParam);
/// <summary>
/// Set the sort icon for the column depending on the sort type
/// </summary>
/// <param name="columnIndex">
/// The column Index.
/// </param>
/// <param name="ascending">
/// The ascending.
/// </param>
private void SetSortIcon(int columnIndex, bool ascending)
{
IntPtr columnHeader = NativeMethods.SendMessage(this.Handle, (int)W32_LVM.LVM_GETHEADER, IntPtr.Zero, IntPtr.Zero);
for (int columnNumber = 0; columnNumber <= this.Columns.Count - 1; columnNumber++)
{
var columnPtr = new IntPtr(columnNumber);
var item = new HDITEM { mask = W32_HDI.HDI_FORMAT };
if (NativeMethods.SendMessage(columnHeader, (int)W32_HDM.HDM_GETITEMW, columnPtr, ref item) == IntPtr.Zero)
{
throw new Win32Exception();
}
if (columnNumber == columnIndex)
{
if (ascending)
{
item.fmt &= ~W32_HDF.HDF_SORTDOWN;
item.fmt |= W32_HDF.HDF_SORTUP;
}
else
{
item.fmt &= ~W32_HDF.HDF_SORTUP;
item.fmt |= W32_HDF.HDF_SORTDOWN;
}
}
else
{
item.fmt &= ~W32_HDF.HDF_SORTDOWN & ~W32_HDF.HDF_SORTUP;
}
if (NativeMethods.SendMessage(columnHeader, (int)W32_HDM.HDM_SETITEMW, columnPtr, ref item) == IntPtr.Zero)
{
throw new Win32Exception();
}
}
}
