Compare Method (x, y)

Implement this method to compare objects given the SortColumn. It's best to start like this

CopyC#

LIST_ITEM item1 = x as LIST_ITEM;
LIST_ITEM item2 = y as LIST_ITEM;
if (item1 == null || item2 == null) return 0;
if (SortColumn < NumColumns)
{
    // the shell is asked
    ShellBrowser.SpecialFolder = ShellFolder.Desktop;
    if (Sorting == SortOrder.Ascending)
        return ShellBrowser.CompareIDs(item1.RelativeItemIdList, item2.RelativeItemIdList, sortColumn);
    else
        return ShellBrowser.CompareIDs(item2.RelativeItemIdList, item1.RelativeItemIdList, sortColumn);
}
else
{
    // perform a normal alphanumeric compare
    if (Sorting == SortOrder.Ascending)
        return item1.SubItems[SortColumn].Text.CompareTo(item2.SubItems[SortColumn].Text);
    else
        return item2.SubItems[SortColumn].Text.CompareTo(item1.SubItems[SortColumn].Text);
}

Declaration Syntax

Visual Basic

Visual C++

public abstract int Compare(
	Object x,
	Object y
)

Public MustOverride Function Compare ( _
	x As Object, _
	y As Object _
) As Integer

public:
virtual int Compare(
	Object^ x, 
	Object^ y
) abstract

Parameters

x (Object): First LIST_ITEM

y (Object): Second LIST_ITEM, which will be compared with first one.

Return Value

Returns a value less than 0 if x is less than y, 0 if x is equal to y and a value greater than 0 if x is greater than y.