Silverlight的DataGridTemplateColumn与DataGridTextColumn

Question

为什么这个工作...

<data:DataGridTemplateColumn Header="YTD v. Exchange" x:Name="YTDvExchange" Visibility="Collapsed" CanUserSort="True" SortMemberPath="ytdExchangeReturn.value"> 
        <data:DataGridTemplateColumn.CellTemplate> 
         <DataTemplate> 
          <TextBlock TextAlignment="Right" VerticalAlignment="Center" 
            Text="{Binding ytdExchangeReturn.value, Converter={StaticResource fcFixedDecimalConverter}}" 
            Foreground="{Binding ytdExchangeReturn.value, Converter={StaticResource fcForegroundValueConverter}}"/> 
         </DataTemplate> 
        </data:DataGridTemplateColumn.CellTemplate> 
       </data:DataGridTemplateColumn> 

但这并不...

<data:DataGridTextColumn Header="YTD v. Exchange" 
        Binding="{Binding ytdExchangeReturn.value, Converter={StaticResource fcFixedDecimalConverter}}" 
        Foreground="{Binding ytdExchangeReturn.value, Converter={StaticResource fcForegroundValueConverter}}"/> 

我得到 'System.Windows.Markup.XamlParseException：AG_E_PARSER_BAD_PROPERTY_VALUE' 为第二个。该问题适用于前景转换器，绑定是好的。

Answer 1

我认为问题是DataGridTextColumn的Foreground属性不是依赖项属性，因此不能用于数据绑定。

http://msdn.microsoft.com/en-us/library/system.windows.controls.datagridtextcolumn.foreground(v=VS.95).aspx

用于CellTemplate TextBlock的Foreground属性是一个依赖属性，因此一个有效的目标数据绑定。

http://msdn.microsoft.com/en-us/library/system.windows.controls.textblock.foreground(v=vs.95).aspx

参考：

http://msdn.microsoft.com/en-us/library/cc221408(VS.95).aspx#setting_properties_data_binding

http://forums.silverlight.net/forums/p/151524/338879.aspx#338879