ComboBox Datasource problem

Hi, i am having a little problem with a combobox that i set his datasource
property to a collection, but doesn populate its items, the strange thing is
that i do the same thing on a datagrid and it works fine.

Take a look:


Public Class Account
Public Sub New(ByVal txtname As String, ByVal txtamount As Double)
name = txtname
amount = txtamount
End Sub
End Class

****************************************

Dim Accounts As New Collection()
Dim NewAccount As New Account("numer1", 1000)
Accounts .Add(NewAccount , 1)
Dim AnotherAccount As New Account("numer2", 2000)
Accounts .Add(AnotherAccount , 2)

*******************************************
Me.ComboBox.DataSource = Nothing
Me.ComboBox.DataSource = Accounts
Me.ComboBox.DisplayMember = "Name"
Me.ComboBox.ValueMember = "Amount" -----Error

"An unhandled exeception of type 'System.InvalidCastException ocurred in
microsoft.visualbasic.dll
Cast from type 'Microsoft.VisualBasic.Collection' to type 'Object()' is not
valid'"

Any ideas?

why i can set the same datasource for a datagrid and the is no error
showing? am i manipulating wrong the collection?

Any suggestion will help.

Thanks for your time

Claes
Wed Jun 23 09:00:58 CDT 2004

Your Account class is missing the Name and Amount
properties that you're trying to use

/claes

"Edgardo" <edgardo@ticoweb.com> wrote in message
news:OcCAWYIWEHA.1380@TK2MSFTNGP09.phx.gbl...
> Hi, i am having a little problem with a combobox that i set his datasource
> property to a collection, but doesn populate its items, the strange thing
is
> that i do the same thing on a datagrid and it works fine.
>
> Take a look:
>
>
> Public Class Account
> Public Sub New(ByVal txtname As String, ByVal txtamount As Double)
> name = txtname
> amount = txtamount
> End Sub
> End Class
>
> ****************************************
>
> Dim Accounts As New Collection()
> Dim NewAccount As New Account("numer1", 1000)
> Accounts .Add(NewAccount , 1)
> Dim AnotherAccount As New Account("numer2", 2000)
> Accounts .Add(AnotherAccount , 2)
>
> *******************************************
> Me.ComboBox.DataSource = Nothing
> Me.ComboBox.DataSource = Accounts
> Me.ComboBox.DisplayMember = "Name"
> Me.ComboBox.ValueMember = "Amount" -----Error
>
> "An unhandled exeception of type 'System.InvalidCastException ocurred in
> microsoft.visualbasic.dll
> Cast from type 'Microsoft.VisualBasic.Collection' to type 'Object()' is
not
> valid'"
>
> Any ideas?
>
> why i can set the same datasource for a datagrid and the is no error
> showing? am i manipulating wrong the collection?
>
> Any suggestion will help.
>
> Thanks for your time
>
>