wpf - 问题数据绑定(bind)到 UserControl 上的 DependencyProperty

Question

我有一个用户控件，我已将依赖属性添加到:

public partial class WordControl : UserControl
{

    // Using a DependencyProperty as the backing store for WordProperty.  This enables animation, styling, binding, etc...
    public static readonly DependencyProperty WordProperty =
        DependencyProperty.Register("WordProperty", typeof(string), typeof(WordControl), new FrameworkPropertyMetadata("", OnWordChange));

    public string Word
    {
        get { return (string)GetValue(WordProperty); }
        set { SetValue(WordProperty, value); }
    }

当我在 XAML 中手动设置 Word 属性时，效果很好:

<WordGame:WordControl Word="Test"></WordGame:WordControl>

但是，我想将此 UserControl 用作 ListBox 的项目模板的一部分，并使用数据绑定(bind)来设置单词:

    <ListBox Name="WordList" IsEnabled="False" IsHitTestVisible="False">
        <ListBox.ItemTemplate>
            <DataTemplate>
                <Grid>
                    <WordGame:WordControl Word="{Binding}"></WordGame:WordControl>
                </Grid>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>

当我运行它时会产生以下错误:

A 'Binding' cannot be set on the 'Word' property of type 'WordControl'. A 'Binding' can only be set on a DependencyProperty of a DependencyObject.

由于 UserControl 继承自 DependencyObject，我只能假设问题出在 DependencyProperty 上，但没有多少谷歌搜索找到答案。

有任何想法吗？

Answer 1

您的注册错误。这:

public static readonly DependencyProperty WordProperty =
        DependencyProperty.Register("WordProperty", typeof(string), typeof(WordControl), new FrameworkPropertyMetadata("", OnWordChange));

应该:

public static readonly DependencyProperty WordProperty =
        DependencyProperty.Register("Word", typeof(string), typeof(WordControl), new FrameworkPropertyMetadata("", OnWordChange));