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08.25.2008 at 10:26AM PDT, ID: 23675906
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7.9

How do I change the following class to accept more than 1 type of object?

Asked by cartch2008 in Programming for ASP.NET, .NET, .Net Editors & IDEs

Tags:

I want to change the following class so that I can pass any of my business objects into it (not just Court like it is set up now)

I've tried replacing "Court" with "Object", but when I run it I get the following error:

Unable to cast object of type 'MyNameSpace.BLL.SortComparer' to type 'System.Collections.Generic.IComparer`1[MyNameSpace.BLL.Contact]'.Start Free Trial
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Imports Microsoft.VisualBasic
Imports System.Collections.Generic
Imports System.Reflection
 
Namespace MyNameSpace.BLL
    Public Class CourtComparer
        Implements IComparer(Of Court)
 
        Public Sub New(ByVal p_propertyName As String)
            Me.PropertyName = p_propertyName
        End Sub
        Private _propertyName As String
        Public Property PropertyName() As String
            Get
                Return _propertyName
            End Get
            Set(ByVal value As String)
                _propertyName = value
            End Set
        End Property
 
        Public Function Compare(ByVal x As Court, ByVal y As Court) As Integer Implements System.Collections.Generic.IComparer(Of Court).Compare
            Dim t As Type = x.GetType()
            Dim val As PropertyInfo = t.GetProperty(Me.PropertyName)
            If Not (val Is Nothing) Then
 
                Return Comparer.DefaultInvariant.Compare(val.GetValue(x, Nothing), val.GetValue(y, Nothing))
 
            Else
 
                Throw New Exception(Me.PropertyName + " is not a valid property to sort on.  It doesn't exist in the Class.")
            End If
        End Function
    End Class
End Namespace
[+][-]08.25.2008 at 11:16AM PDT, ID: 22307735

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Zones: Programming for ASP.NET, .NET, .Net Editors & IDEs
Tags: asp.net
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