ToggleButton wpf IsEnabled property cannot binding to datasource

Question

It is a so strange problem,
I am try to binding IsEnabled to a datasource property. like
IsEnabled="{Binding CanLockUnlock, Mode=OneWay}">
CanLockUnlock has implemented propertychanged..
It cannot work, but when I attached by VS debug to the application, and remove 'Mode=OneWay', the binding works!

when I write IsEnabled="{Binding CanLockUnlock}"> It also cannot work by itself !, the odd thing happens,
I attached to application by VS debug. add 'Mode=OneWay' , the binding works !!!!

that is whatever I write the binding, it doesn't work by itself.. only when I revised the binding by attaching it ,change the binding setting, it work!

I find it ToggleButton wpf IsEnabled property cannot binding..

Someone help me !!

I have made a workround to the problem, I put the ToggleButton in a stackpanel and binding IsEnabled of stackpanel.
I still want to know why...ToggleButton cannot works

Answer 1

Hi,
there's no problem. Try following demo:

XAML:

<Window x:Class="Window111"  
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"  
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"  
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"  
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"  
        xmlns:local="clr-namespace:WpfApp1.WpfApp111"  
        mc:Ignorable="d"  
        Title="62241333_220215" Height="450" Width="800">  
  <Window.DataContext>  
    <local:ViewModel/>  
  </Window.DataContext>  
    <StackPanel>  
    <Button Content="Change CanLockUnlock" Command="{Binding}" Margin="10"/>  
    <ToggleButton Content="ToggleButton" IsEnabled="{Binding CanLockUnlock}" Margin="10"/>  
  </StackPanel>  
</Window>  

and ViewModel:

Imports System.ComponentModel  
Imports System.Runtime.CompilerServices  
  
Namespace WpfApp111  
  Public Class ViewModel  
    Implements ICommand, INotifyPropertyChanged  
  
    Public Property CanLockUnlock As Boolean = True  
  
    Public Event CanExecuteChanged As EventHandler Implements ICommand.CanExecuteChanged  
    Public Sub Execute(parameter As Object) Implements ICommand.Execute  
      CanLockUnlock = Not CanLockUnlock  
      OnPropertyChanged(NameOf(CanLockUnlock))  
    End Sub  
    Public Function CanExecute(parameter As Object) As Boolean Implements ICommand.CanExecute  
      Return True  
    End Function  
  
    Public Event PropertyChanged As PropertyChangedEventHandler Implements INotifyPropertyChanged.PropertyChanged  
    Private Sub OnPropertyChanged(<CallerMemberName> Optional propName As String = "")  
      RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs(propName))  
    End Sub  
  End Class  
End Namespace  

Result: