如何在数据网格中添加资源作为绑定？

Question

这是我的代码的一部分：

<ribbon:RibbonWindow x:Class="MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:sys="clr-namespace:System;assembly=mscorlib"
    xmlns:ribbon="clr-namespace:Microsoft.Windows.Controls.Ribbon;assembly=RibbonControlsLibrary"
    x:Name="RibbonWindow"
Width="850" Height="600">

    <Window.Resources>
        <ResourceDictionary>
            <sys:Int32 x:Key="Timestep">0</sys:Int32>

            <CollectionViewSource x:Key="cvsNodes" />
        </ResourceDictionary>
    </Window.Resources>

    ...

    <DataGrid x:Name="NodeDataGrid" Grid.Row="1" AutoGenerateColumns="False" AlternatingRowBackground="Linen" IsReadOnly="True" ItemsSource="{Binding Source={StaticResource cvsNodes}}">
        <DataGrid.Columns>
            <DataGridTextColumn Header="Node" Binding="{Binding Path=ID}" SortDirection="Ascending" />
            <DataGridTextColumn Header="X" Binding="{Binding Path=Position.X, StringFormat=\{0:F\}}" />
            <DataGridTextColumn Header="Y" Binding="{Binding Path=Position.Y, StringFormat=\{0:F\}}" />
            <DataGridTextColumn Header="Z" Binding="{Binding Path=Position.Z, StringFormat=\{0:F\}}" />
            <DataGridTextColumn Header="Pressure (s)" Binding="{Binding Path=Results[{DynamicResource Timestep}].PressureSupply, StringFormat=\{0:F\}}" />
        </DataGrid.Columns>
    </DataGrid>

    ...
</ribbon:RibbonWindow>

一切正常，除了这一行：

<DataGridTextColumn Header="Pressure (s)" Binding="{Binding Path=Results[{DynamicResource Timestep}].PressureSupply, StringFormat=\{0:F\}}" />

但是，这可行（我将 {DynamicResource Timestep} 替换为 0）：

<DataGridTextColumn Header="Pressure (s)" Binding="{Binding Path=Results[0].PressureSupply, StringFormat=\{0:F\}}" />

我如何做到这一点？

Answer 1

据我所知，索引器必须是编译时常量，因此无法执行您正在尝试的操作。解决方法将取决于您的确切要求，但您可以拥有一个具有众所周知的名称的属性，该属性会根据当前时间步公开正确的结果。