WPF自定义UserControl-依赖属性绑定

Question

我在WPF中创建了一个UserControl并生成了一些依赖项属性。 但是在属性之一上，我无法在XAML中设置绑定。

internal Visibility ProgressbarVisibility
{
    get { return (Visibility)GetValue(ProgressbarVisibilityProperty); }
    set { SetValue(ProgressbarVisibilityProperty, value); }
}

internal static readonly DependencyProperty ProgressbarVisibilityProperty =
          DependencyProperty.Register("ProgressbarVisibility", typeof(Visibility), typeof(ImportBox), new PropertyMetadata(Visibility.Hidden));

所以我得到以下错误：

不能在“ ImportBox”类型的“ ProgressbarVisibility”属性上设置“ Binding”。 只能在DependencyObject的DependencyProperty上设置“绑定”。

当我将属性“固定编码”设置为固定值时，这没有问题。

其他Dependeny Properties不会抛出这种类型的错误，我可以绑定我想要的所有内容。

internal ImageSource ImageSource
      {
         get { return (ImageSource)GetValue(ImageSourceProperty); }
         set { SetValue(ImageSourceProperty, value); }
      }

internal static readonly DependencyProperty ImageSourceProperty =
          DependencyProperty.Register("ImageSource", typeof(ImageSource), typeof(ImportBox));

internal string HeaderText
      {
         get { return (string)GetValue(HeaderTextProperty); }
         set { SetValue(HeaderTextProperty, value); }
      }

internal static readonly DependencyProperty HeaderTextProperty =
          DependencyProperty.Register("HeaderText", typeof(string), typeof(ImportBox));

internal UIElement PresenterContent
      {
         get { return (UIElement)GetValue(PresenterContentProperty); }
         set { SetValue(PresenterContentProperty, value); }
      }

internal static readonly DependencyProperty PresenterContentProperty =
          DependencyProperty.Register("PresenterContent", typeof(UIElement), typeof(ImportBox));

Answer 1

将DependencyProperty为Public将解决您的问题...

public Visibility ProgressbarVisibility
{
    get { return (Visibility)GetValue(ProgressbarVisibilityProperty); }
    set { SetValue(ProgressbarVisibilityProperty, value); }
}

public static readonly DependencyProperty ProgressbarVisibilityProperty =
      DependencyProperty.Register("ProgressbarVisibility", typeof(Visibility), typeof(ImportBox), new PropertyMetadata(Visibility.Hidden));