c# - 从静态上下文更改非静态对象

Question

我有下一个依赖属性:

public static DependencyProperty IsInReadModeProperty =
    DependencyProperty.Register("IsInReadMode", typeof(bool),
    typeof(RegCardSearchForm), new PropertyMetadata(false, ReadModeChanged));

我有下一个处理属性更改事件的方法:

public static void ReadModeChanged(DependencyObject d,
    DependencyPropertyChangedEventArgs e)
{
    if ((bool)e.NewValue)
    {       
        btnSearch.Visibility = Visibility.Collapsed;
        btnExport.Visibility = Visibility.Collapsed;
        cbExportWay.Visibility = Visibility.Collapsed;
    }
}

但编译器给我的错误是我无法在静态上下文中访问非静态按钮(btnSearch 和 e.t.c)。

我想在属性值改变时改变按钮的可见性。我该如何解决这种情况？

Answer 1

由于(非附加的)DependencyProperties 仅限于在其所有者类型上设置，您只需创建一个实例方法来保存您的逻辑并通过转换 DependencyObject 从静态方法调用它:

public static readonly DependencyProperty IsInReadModeProperty = DependencyProperty.Register(
    "IsInReadMode",
    typeof(bool),
    typeof(RegCardSearchForm),
    new UIPropertyMetadata(false, ReadModeChanged));

private static void ReadModeChanged(DependencyObject dObj, DependencyPropertyChangedEventArgs e)
{
    RegCardSearchForm form = dObj as RegCardSearchForm;
    if (form != null)
        form.ReadModeChanged((bool)e.OldValue, (bool)e.NewValue);
}

protected virtual void ReadModeChanged(bool oldValue, bool newValue)
{
    // TODO: Add your instance logic.
}