WPF Error ToggleButton IsChecked

Question

I am trying to create a situation where one or none of the groups of two ToggleButtoncan be included at any time. The problem is that if I change the state of the backup variable, the state of the user interface will not be updated.

I have one INotifyPropertyChanged.

I created mine ToggleButtonas follows:

        <ToggleButton IsChecked="{Binding Path=IsPermanentFailureState, Mode=TwoWay}"
                      HorizontalContentAlignment="Center"
                      VerticalContentAlignment="Center">
            <TextBlock TextWrapping="Wrap" 
                       TextAlignment="Center">Permanent Failure</TextBlock>
        </ToggleButton>
        <ToggleButton IsChecked="{Binding Path=IsTransitoryFailureState, Mode=TwoWay}"
                      HorizontalContentAlignment="Center"
                      VerticalContentAlignment="Center">
            <TextBlock TextWrapping="Wrap" 
                       TextAlignment="Center">Temporary Failure</TextBlock>
        </ToggleButton>

These are my supporting properties (I use the MVVM template, other bindings work, IE clicking on ToggleButtonenters these property parameters. When I change the state using the code, the Toggle button does not change the visual state. IE I set the backing property to false, but the button remains marked.

    public bool? IsPermanentFailureState
    {
        get { return isPermFailure; }
        set
        {
            if (isPermFailure != value.Value)
            {
                NotifyPropertyChanged("IsPermanentFailureState");
            }
            isPermFailure = value.Value;
            if (isPermFailure) IsTransitoryFailureState = false;
        }
    }

    public bool? IsTransitoryFailureState
    {
        get { return isTransitoryFailureState; }
        set
        {
            if (isTransitoryFailureState != value.Value)
            {
                NotifyPropertyChanged("IsTransitoryFailureState");
            }
            isTransitoryFailureState = value.Value;
            if (isTransitoryFailureState) IsPermanentFailureState = false;
        }
    }

Answer 1

, . WPF , . :

public bool? IsPermanentFailureState
{
    get { return isPermFailure; }
    set
    {
        if (isPermFailure != value.Value)
        {
            isPermFailure = value.Value;
            NotifyPropertyChanged("IsPermanentFailureState");
        }
        if (isPermFailure) IsTransitoryFailureState = false;
    }
}

public bool? IsTransitoryFailureState
{
    get { return isTransitoryFailureState; }
    set
    {
        if (isTransitoryFailureState != value.Value)
        {
            isTransitoryFailureState = value.Value;
            NotifyPropertyChanged("IsTransitoryFailureState");
        }
        if (isTransitoryFailureState) IsPermanentFailureState = false;
    }
}

, , , , , , .

Answer 2

: , . ,           isPermFailure = value.Value; :

        if (isPermFailure != value.Value)            
        {
            isPermFailure = value.Value;
            NotifyPropertyChanged("IsPermanentFailureState");
        }

.

, :

        if (isPermFailure != value.Value)            
        {
            isPermFailure = value.Value;
            NotifyPropertyChanged("IsPermanentFailureState");
            if (isPermFailure) 
                IsTransitoryFailureState = false;
        }

.