Question

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只包含一个属性（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：

无法分配属性'App4.MyUserControl1.MyParagraph'。

我已从Flex迁移，所以我做错了但我不知道在哪里。

Answer 1

为了绑定数据，target属性必须是DependancyProperty，所以为了使这个绑定工作，MyParagraph应该是UserControl中的dependancyproperty，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));

将属性绑定到自定义ItemTemplate

1 个答案: