急求！ListView控件按列倒序排序问题

[cuiwb770111]

看到上面的几个有关ListView控件的按列排序的贴子，感觉很好很实用，但不知有什么方法可以实现按倒序的方式排序。

[reaperwu]

Private Sub ListView1_ColumnClick(ByVal sender As Object, ByVal e As System.Windows.Forms.ColumnClickEventArgs) Handles ListView1.ColumnClick

If ListView1.Sorting = SortOrder.Descending Then
ListView1.Sorting = SortOrder.Ascending
Else
ListView1.Sorting = SortOrder.Descending

End If

End Sub

[fengyaner]

public class mySorter:IComparer
{
private Comparer comparer;
private int sortColumn;
private SortOrder sortOrder;
public mySorter()
{
sortColumn=0;
sortOrder=SortOrder.None;
comparer=Comparer.Default;
}
//指定进行排序的列
public int SortColumn
{
get {return sortColumn;}
set {sortColumn=value;}
}
//指定按升序或降序进行排序
public SortOrder SortOrder
{
get {return sortOrder;}
set {sortOrder=value;}
}
public int Compare(object x,object y)
{
int CompareResult;
ListViewItem itemX=(ListViewItem)x;
ListViewItem itemY=(ListViewItem)y;
//在这里您可以提供自定义的排序
CompareResult=comparer.Compare(itemX.SubItems[this.sortColumn].Text,itemY.SubItems[this.sortColumn].Text);
if (this.SortOrder==SortOrder.Ascending)
return CompareResult;
else
if (this.SortOrder==SortOrder.Descending)
return (-CompareResult);
else
return 0;
}
}