Mega Code Archive
IComparable
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Imports System.Collections
Module Test
Public Sub Main()
Dim objEmployee1 As New Employee()
Dim objEmployee2 As New Employee()
Dim objEmployee3 As New Employee()
objEmployee1.FirstName = "A"
objEmployee1.LastName = "B"
objEmployee2.FirstName = "C"
objEmployee2.LastName = "D"
objEmployee3.FirstName = "E"
objEmployee3.LastName = "F"
Dim slPeople As New SortedList()
slPeople.Add(objEmployee1, 1)
slPeople.Add(objEmployee2, 2)
slPeople.Add(objEmployee3, 3)
Dim objDE As DictionaryEntry
For Each objDE In slPeople
Console.WriteLine("{0} {1}",CType(objDE.Key, Employee).DisplayName, CType(objDE.Value,Integer))
Next
End Sub
End Module
Public Class Employee
Implements IComparable
Public FirstName As String
Public LastName As String
Public ReadOnly Property DisplayName() As String
Get
Return String.Format("{0} {1}", FirstName, LastName)
End Get
End Property
Public Function CompareTo(ByVal obj As Object) As Integer _
Implements System.IComparable.CompareTo
Dim objOtherEmployee As Employee
objOtherEmployee = CType(obj, Employee)
If objOtherEmployee.LastName > Me.LastName Then
Return -1
ElseIf objOtherEmployee.LastName < Me.LastName Then
Return 1
Else
If objOtherEmployee.FirstName > Me.FirstName Then
Return -1
ElseIf objOtherEmployee.FirstName < Me.FirstName Then
Return 1
Else
Return 0
End If
End If
End Function
End Class
A B 1
C D 2
E F 3
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