How sort a System.Collections.Generic.List in VB.Net?

Question

I using a genric list(m_equipmentList ) which is collection of objects (Schedule_Payitem).
How can sort list according to a proerty of child object ?

Dim m_         


        

Answer 1

Are you using VB9? If so, I'd use a lambda expression to create a Comparer(Of Schedule_PayItem). Otherwise, write a short class to implement IComparer(Of Schedule_PayItem). pass whichever one you've got into List.Sort.

An example for the lambda expression (untested):

m_equipmentList.Sort(Function(p1, p2) p1.ResourceID.CompareTo(p2.ResourceID))

And for the IComparer(Of Schedule_PayItem):

Public Class PayItemResourceComparer
    Implements IComparer(Of Schedule_PayItem)
    Public Function Compare(ByVal p1 As Schedule_PayItem, _
                            ByVal p2 As Schedule_PayItem) As Integer
        Return p1.ResourceID.CompareTo(p2.ResourceID)
    End Function
End Class

...

m_equipmentList.Sort(New PayItemResourceComparer)