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10/18/2009 at 05:50AM PDT, ID: 24821581
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7.4

Unable to cast object of type 'System.Collections.Generic.List`1[WindowsApplication1.Car]' to type 'WindowsApplication1.CarCollection'.

Asked by Hoboly in Microsoft Visual Basic.Net, .NET, VB Objects

Tags: vb.net

why there is a error in this line "        cc2 = cc1.FindAll(p1) "?


Unable to cast object of type 'System.Collections.Generic.List`1[WindowsApplication1.Car]' to type 'WindowsApplication1.CarCollection'.

How can I solve it and still want to return CarCollection?
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Public Class Form2
 
    Friend Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim cc1 As New CarCollection
        Dim cc2 As CarCollection
        'Dim cc2 As List(Of Car)
        cc1.Add(New Car With {.name = "F1", .price = 10000})
        cc1.Add(New Car With {.name = "F3", .price = 30000})
        cc1.Add(New Car With {.name = "F2", .price = 20000})
        Dim p1 As Predicate(Of Car)
        p1 = AddressOf findCar
        cc2 = cc1.FindAll(p1) '''''''
        DataGridView1.DataSource = cc2
    End Sub
 
    Private Function findCar(ByVal car12 As Car) As Boolean
        If car12.name = "F2" Then
            Return True
        Else
            Return False
        End If
    End Function
 
    Private Sub Form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
 
    End Sub
End Class
 
 
Friend Class CarCollection
    Inherits List(Of Car)
 
End Class
 
 
Friend Class Car
    Public name As String
    Public price As Integer
End Class
[+][-]10/18/09 06:05 AM, ID: 25599715

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About this solution

Zones: Microsoft Visual Basic.Net, .NET, VB Objects
Tags: vb.net
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Solution Provided By: Omego2K
Participating Experts: 2
Solution Grade: B
 
 
[+][-]10/18/09 08:52 AM, ID: 25600250

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