CommunityToolkit (apparently ) not generating internal code

Question

I've decided to give the CommunityToolkit a try but my code and the parts of the Toolkit are not making a connection.

Here's the relevant parts of my MainWi8ndow:

<Window
    x:Class="MainWindow"

    <Window.DataContext>
        <self:MainWindowVM />
    </Window.DataContext>

    <Label
        Content="{Binding Path=FirstLabel}" />

    <Button
        Command="{Binding Path=ExitMe}"
        Content="Exit" />
</Window>

And the View Model:

Imports CommunityToolkit.Mvvm.ComponentModel
Imports CommunityToolkit.Mvvm.Input

Partial Public Class MainWindowVM
    Inherits ObservableObject
    ....
<RelayCommand>
Private Sub ExitMe()
    Windows.Application.Current.Shutdown()
End Sub
    ....
<ObservableProperty>
Private FirstLabel As String
....
<End Class

At run-time I get two error messages:

ExitMe' property not found on 'object' ''MainWindowVM'

That is obviously a correct error message but that is the way it is done in an example I am using as a guide.

BindingExpression path error: 'FirstLabel' property not found on 'object' ''MainWindowVM'

That one I don't understand. My understanding is that the toolkit generates the Public property from the private declaration. Is that not correct?

Thanks in advance for the help.

Answer 1

Using the toolkit in the manner shown by my code is only possible with C#.

Answer 2

You could use the following code.

Imports CommunityToolkit.Mvvm.ComponentModel
Imports CommunityToolkit.Mvvm.Input

Class MainWindow

End Class

Partial Public Class MainWindowVM
    Inherits ObservableObject

    Public Sub New()
        Me.FirstLabel = "default value..."
        Me.ExitMe = New RelayCommand(AddressOf exMe)
    End Sub

    <ObservableProperty>
    Private fLabel As String

    Public Property FirstLabel As String


    Private Sub Save()
        Me.fLabel = FirstLabel


    End Sub



    <RelayCommand>
    Private Sub exMe()
        Windows.Application.Current.Shutdown()
    End Sub

    Public ReadOnly Property ExitMe As ICommand


End Class

---

If the response is helpful, please click "Accept Answer" and upvote it.

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.