将属性绑定到自定义项模板

本文关键字:自定义 属性 绑定 | 更新日期: 2023-09-27 18:33:47

我有一个ListView和一个自定义ItemTemplate(MyUserControl1)。

<ListView Name="listView" HorizontalAlignment="Left" Height="454" Margin="656,147,0,-461" VerticalAlignment="Top" Width="337">
    <ListView.ItemTemplate>
        <DataTemplate>
            <StackPanel Grid.Column="1" VerticalAlignment="Top" Margin="10,0,0,0">
                <TextBlock Text="{Binding text}" Style="{StaticResource CaptionTextStyle}" TextWrapping="NoWrap"/>
                <local:MyUserControl1 MyParagraph="{Binding paragraph}"></local:MyUserControl1>
                <TextBlock Text="test" Style="{StaticResource CaptionTextStyle}" TextWrapping="NoWrap"/>
            </StackPanel>
        </DataTemplate>
    </ListView.ItemTemplate>
</ListView>

MyUserControl1.cs 仅包含一个属性 (MyParagraph):

public Paragraph MyParagraph
{
    get 
    { 
        return _MyParagraph; 
    }
    set 
    {
        _MyParagraph = value;
        Paragraph paragraph = new Paragraph();
        for (int i = 0; i < _MyParagraph.Inlines.Count; i++)
        {
            paragraph.Inlines.Add(_MyParagraph.Inlines[i]);
            richTextBlock.Blocks.Add(paragraph);
        }
    }
}

我得到的错误是:

无法分配给属性"App4.MyUserControl1.MyParagraph"。

我已经从 Flex 迁移过来了,所以我做错了什么,但我不知道在哪里。

将属性绑定到自定义项模板

为了绑定数据,目标属性必须是 DependancyProperty,因此为了使此绑定正常工作,MyParagraph应该是 UserControl 中的依赖项属性,如下所示

 public Paragraph MyParagraph
  {
    get { return (Paragraph)this.GetValue(MyParagraphProperty); }
    set { this.SetValue(MyParagraphProperty, value); } 
  }
  public static readonly DependencyProperty MyParagraphProperty = DependencyProperty.Register(
    "MyParagraph", typeof(Paragraph), typeof(UserControl1),new PropertyMetadata(null));