在运行时更新DataContext属性不起作用

Question

我不确定它在WPF和C＃中是如何工作的。它仍然很容易混淆。当TabControl或DataContext上的属性为true时，我想要显示x:Class。我像这样将DataContext分配给我的窗口;

private ModelObject DataContextModel = new ModelObject()
{
    Minutes = 0,
    Hour = 0
};

...

this.DataContext =  DataContextModel

ModelObject看起来像这样;

public class ModelObject : INotifyPropertyChanged
{
    ...
    bool LiveScrapingValue = true;
    public bool LiveScraping
    {
        get { return LiveScrapingValue; }
        set
        {
            LiveScrapingValue = value;
        }
    }
    ...

我的TabControl元素如下所示;

<TabControl Name="ScraperLiveAttorneysTabControl" Visibility="{Binding LiveScraping, Converter={StaticResource boolToVisibilityConverter}}">

我知道我应该创建一个bool to visibility转换器，所以我在x：Class上创建了一个;

public class BooleanToVisibilityConverter : IValueConverter
{

    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        if (value is bool)
        {
            if ((bool)value == true)
            {
                return Visibility.Visible;
            }
            else
            {
                return Visibility.Hidden;
            }
        }
        return Visibility.Hidden;
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

..以及随之而来的资源;

<Controls:MetroWindow.Resources>
    <local:BooleanToVisibilityConverter x:Key="boolToVisibilityConverter"/>
</Controls:MetroWindow.Resources>

现在我无法访问我设置的this.DataContext数据并将属性LiveScraping更改为true或false以显示或隐藏TabControl。我的方法就是使用;

DataContextModel.LiveScraping = true;

但这不起作用，因为this.DataContext并非指向DataContextModel