int IComparer.Compare(object item1, object item2)
{
if (item1 is null)
{
if (item2 is null)
{
return(0); //both null, then they are equal
}
return(-1); //item1 is null, but item2 is valid (greater)
}
if (item2 is null)
{
return(1); //item2 is null, so item 1 is greater
}
if (item1 is Entry entry1)
{
item1 = entry1.item;
}
if (item2 is Entry entry2)
{
item2 = entry2.item;
}
string itemName1 = _listControl.GetItemText(item1);
string itemName2 = _listControl.GetItemText(item2);
CompareInfo compInfo = Application.CurrentCulture.CompareInfo;
return(compInfo.Compare(itemName1, itemName2, CompareOptions.StringSort));
}
int IComparer <Entry> .Compare(Entry?entry1, Entry?entry2)
{
if (entry1 is null)
{
if (entry2 is null)
{
return(0); //both null, then they are equal
}
return(-1); //item1 is null, but item2 is valid (greater)
}
if (entry2 is null)
{
return(1); //item2 is null, so item 1 is greater
}
string itemName1 = _listControl.GetItemText(entry1.Item);
string itemName2 = _listControl.GetItemText(entry2.Item);
CompareInfo compInfo = Application.CurrentCulture.CompareInfo;
return(compInfo.Compare(itemName1, itemName2, CompareOptions.StringSort));
}
public int Compare(object x, object y)
{
return string.Compare(owner.GetItemText(x), owner.GetItemText(y));
}