WPF数据绑定架构问题

Question

我正在尝试学习如何使用WPF绑定和MVVM架构.我在Dependency Properties遇到了一些麻烦.我试图通过将它绑定到DataContext中的DependencyProperty来控制视图上项目的可见性,但它不起作用.无论我GridVisible在下面的视图模型的构造函数中设置值,它在运行代码时始终显示为可见.

谁能看到我哪里出错了？

C#代码(ViewModel):

public class MyViewModel : DependencyObject
{
    public MyViewModel ()
    {
        GridVisible = false;
    }

    public static readonly DependencyProperty GridVisibleProperty =
    DependencyProperty.Register(
        "GridVisible",
        typeof(bool),
        typeof(MyViewModel),
        new PropertyMetadata(false,
                new PropertyChangedCallback(GridVisibleChangedCallback)));

    public bool GridVisible
    {
        get { return (bool)GetValue(GridVisibleProperty); }
        set { SetValue(GridVisibleProperty, value); }
    }

    protected static void GridVisibleChangedCallback(
        DependencyObject source,
        DependencyPropertyChangedEventArgs e)
    {
        // Do other stuff in response to the data change.
    }
}

XAML代码(查看):

<UserControl ... >

    <UserControl.Resources>
        <BooleanToVisibilityConverter x:Key="BoolToVisConverter" />
    </UserControl.Resources>

    <UserControl.DataContext>
        <local:MyViewModel x:Name="myViewModel" />
    </UserControl.DataContext>

    <Grid x:Name="_myGrid"
        Visibility="{Binding Path=GridVisible,
            ElementName=myViewModel,
            Converter={StaticResource BoolToVisConverter}}">

        <!-- Other elements in here -->

    </Grid>

</UserControl>

我在线查看了几个教程,看起来我正确地遵循了我在那里发现的内容.有任何想法吗？谢谢!

Answer 1

将 ElementName 从绑定中删除，这似乎不正确。将其更改为：

<Grid x:Name="_myGrid"
        Visibility="{Binding Path=GridVisible,
            Converter={StaticResource BoolToVisConverter}}">