在WinRT XAML（Windows8，Metro，Windows应用商店应用）中绑定另一个属性

Question

我想说：请不要建议替代解决方案，除非您可以在不修改类型图案BaseXXXXXX

中说，这种行为竟把我而言远远超出傻了眼，它似乎是为了隐藏在C＃中的属性使用new关键字指的WinRT XAML（Windows8中，地铁中，Windows Store App）绑定不再正常运行。我不知道这是为什么。

下面是一个例子：

C＃：

namespace WinRtSandbox 
{ 
    public class BaseClass 
    { 
     public string Property1 { get; set; } 
     public int[] Property2 { get; set; } 
     public object Property3 { get; set; } 
    } 


    public class ModifiedClass : BaseClass 
    { 
     public new string Property1 { get; set; } 
     public new long[] Property2 { get; set; } 
     public new string Property3 { get; set; } 
    } 

    public sealed partial class MainPage : Page 
    { 

     public BaseClass Normal { get; set; } 
     public ModifiedClass Modified { get; set; } 

     public MainPage() 
     { 
      this.Normal = new BaseClass 
      { 
       Property1 = "WTF", 
       Property2 = new[] { 2, 3, 4 }, 
       Property3 = "Work?" 
      }; 

      this.Modified = new ModifiedClass 
      { 
       Property1 = "WTF", 
       Property2 = new[] { 2L, 3L, 4L }, 
       Property3 = "Work?" 
      }; 

      this.InitializeComponent(); 
     } 
    } 
} 

的WinRT XAML：

<Page 
    x:Class="WinRtSandbox.MainPage" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    xmlns:local="using:WinRtSandbox" 
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
    DataContext="{Binding RelativeSource={RelativeSource Self}}" 
    mc:Ignorable="d"> 

    <Grid Background="{StaticResource ApplicationPageBackgroundThemeBrush}"> 
     <Border Background="#22000000" Padding="40" Width="400" Height="500"> 
      <Grid> 

       <Grid.Resources> 
        <Style TargetType="Rectangle"> 
         <Setter Property="Height" Value="1"/> 
         <Setter Property="HorizontalAlignment" Value="Stretch"/> 
         <Setter Property="Margin" Value="0,15,0,15"/> 
         <Setter Property="Fill" Value="{StaticResource ApplicationForegroundThemeBrush}"/> 
        </Style> 
       </Grid.Resources> 

       <Grid.ColumnDefinitions> 
        <ColumnDefinition/> 
        <ColumnDefinition/> 
       </Grid.ColumnDefinitions> 

       <StackPanel Grid.Column="0"> 

        <ItemsControl> 
         <TextBlock Text="this.Normal"/> 
         <Rectangle/> 
         <TextBlock Text="this.Normal.Property1"/> 
         <Rectangle/> 
         <TextBlock Text="this.Normal.Property2"/> 
         <Rectangle/> 
         <TextBlock Text="this.Normal.Property3"/> 
        </ItemsControl> 

        <Rectangle Fill="Red"/> 

        <ItemsControl> 
         <TextBlock Text="this.Modified"/> 
         <Rectangle/> 
         <TextBlock Text="this.Modified.Property1"/> 
         <Rectangle/> 
         <TextBlock Text="this.Modified.Property2"/> 
         <Rectangle/> 
         <TextBlock Text="this.Modified.Property3"/> 
        </ItemsControl> 

       </StackPanel> 

       <StackPanel Grid.Column="1"> 

        <ItemsControl DataContext="{Binding Normal}"> 
         <TextBlock Text="{Binding}"/> 
         <Rectangle/> 
         <TextBlock Text="{Binding Property1}"/> 
         <Rectangle/> 
         <TextBlock Text="{Binding Property2}"/> 
         <Rectangle/> 
         <TextBlock Text="{Binding Property3}"/> 
        </ItemsControl> 

        <Rectangle Fill="Red"/> 

        <ItemsControl DataContext="{Binding Modified}"> 
         <TextBlock Text="{Binding}"/> 
         <Rectangle/> 
         <TextBlock Text="{Binding Property1}"/> 
         <Rectangle/> 
         <TextBlock Text="{Binding Property2}"/> 
         <Rectangle/> 
         <TextBlock Text="{Binding Property3}"/> 
        </ItemsControl> 

       </StackPanel> 
      </Grid> 
     </Border> 

    </Grid> 
</Page> 

的全太不正确的结果看起来类似：

基本上，每一个这些空行都应该填充你们中的任何一个XAML人员都知道为什么这些绑定失败了，是否有任何可以解决的问题我只能假设是一个令人发指的bug ？任何帮助或洞察力将不胜感激，谢谢提前... -ck

更新：输出转储我忘记

Error: BindingExpression path error: 'Property2' property not found on 'WinRtSandbox.ModifiedClass'. BindingExpression: Path='Property2' DataItem='WinRtSandbox.ModifiedClass'; target element is 'Windows.UI.Xaml.Controls.TextBlock' (Name='null'); target property is 'Text' (type 'String') 
Error: BindingExpression path error: 'Property3' property not found on 'WinRtSandbox.ModifiedClass'. BindingExpression: Path='Property3' DataItem='WinRtSandbox.ModifiedClass'; target element is 'Windows.UI.Xaml.Controls.TextBlock' (Name='null'); target property is 'Text' (type 'String') 

更新：

错误与微软提起：https://connect.microsoft.com/VisualStudio/feedback/details/782993/binding-a-property-that-hides-another-in-winrt-xaml所以我们会看看这是怎么回事

Answer 1

原来，这是一个“不支持虫”这意味着什么？下面是直接引用：

嗨，很抱歉我们迟到的回应。到目前为止，我们不支持这个错误。 请致电http://support.microsoft.com或致电1-800-MICROSOFT获取 帮助。谢谢。

...希望这将是固定在.NET 4.5.1

查看bug报告： https://connect.microsoft.com/VisualStudio/feedback/details/782993/binding-a-property-that-hides-another-in-winrt-xaml

Answer 2

我同意它似乎是一个错误。

我知道你说你不想要替代品，但为了其他人可能会读这个问题，我会忽略你。

可以解决这个问题是通过使每个属性到一个DependencyProperty

public class BaseClass : DependencyObject 
{ 
    public static readonly DependencyProperty Property1Property = DependencyProperty.Register(
     "Property1", 
     typeof(string), 
     typeof(BaseClass), 
     new PropertyMetadata(null)); 

    public string Property1 
    { 
     get { return (string)GetValue(Property1Property); } 
     set { SetValue(Property1Property, value); } 
    } 

    public static readonly DependencyProperty Property2Property = DependencyProperty.Register(
     "Property2", 
     typeof(int[]), 
     typeof(BaseClass), 
     new PropertyMetadata(null)); 

    public int[] Property2 
    { 
     get { return (int[])GetValue(Property2Property); } 
     set { SetValue(Property2Property, value); } 
    } 

    public static readonly DependencyProperty Property3Property = DependencyProperty.Register(
     "Property3", 
     typeof(object), 
     typeof(BaseClass), 
     new PropertyMetadata(null)); 

    public object Property3 
    { 
     get { return GetValue(Property3Property); } 
     set { SetValue(Property3Property, value); } 
    } 
} 


public class ModifiedClass : BaseClass 
{ 
    public static readonly new DependencyProperty Property1Property = DependencyProperty.Register(
     "Property1", 
     typeof(string), 
     typeof(ModifiedClass), 
     new PropertyMetadata(null)); 

    public new string Property1 
    { 
     get { return (string)GetValue(Property1Property); } 
     set { SetValue(Property1Property, value); } 
    } 

    public static readonly new DependencyProperty Property2Property = DependencyProperty.Register(
     "Property2", 
     typeof(long[]), 
     typeof(ModifiedClass), 
     new PropertyMetadata(null)); 

    public new long[] Property2 
    { 
     get { return (long[])GetValue(Property2Property); } 
     set { SetValue(Property2Property, value); } 
    } 

    public static readonly new DependencyProperty Property3Property = DependencyProperty.Register(
     "Property3", 
     typeof(string), 
     typeof(ModifiedClass), 
     new PropertyMetadata(null)); 

    public new string Property3 
    { 
     get { return (string)GetValue(Property3Property); } 
     set { SetValue(Property3Property, value); } 
    } 
}