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\}}" />
然而,这有效(我将{DynamicResource Timestep}替换为0):
<DataGridTextColumn Header="Pressure (s)" Binding="{Binding Path=Results[0].PressureSupply, StringFormat=\{0:F\}}" />
我如何实现这一目标?
答案 0 :(得分:1)
据我所知,索引器必须是编译时常量,所以没有办法做你正在尝试的事情。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名称的属性,该属性根据当前时间步骤公开正确的结果。