绑定在WinRT XAML中隐藏另一个属性的属性(Windows8,Metro,Windows应用商店应用)

Question

在前面我想说:请不要建议替代解决方案,除非您可以在不修改BaseXXXXXX模式的类型的情况下完成它

也就是说,就我而言,这种行为远远超出了困惑,似乎使用new关键字来隐藏C#中的属性意味着WinRT XAML(Windows8,Metro,Windows Store App)绑定不再正常运行.我不知道为什么会这样.

这是一个例子:

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();
        }
    }
}

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>

完全错误的结果看起来像:

基本上,每个空白行应该填写你们中的任何一个XAML热门有任何想法为什么这些绑定失败,有什么可以做的解决我只能假设是一个令人发指的bug？任何帮助或见解将不胜感激,谢谢你提前... -ck

更新:输出转储我忘了

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:

向微软提交的错误:https://connect.microsoft.com/VisualStudio/feedback/details/782993/binding-a-property-that-hides-another-in-winrt-xaml所以我们将看到这是怎么回事

Answer 1

事实证明，这是一个“不受支持的错误”，无论这意味着什么......这是直接引用：

您好，很抱歉我们回复晚了。到目前为止我们还不支持这个错误。请访问http://support.microsoft.com或致电 1-800-MICROSOFT 寻求帮助。谢谢。

...希望这将在 .NET 4.5.1 中得到修复

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