Silverlight DataGridTemplateColumn与DataGridTextColumn

Question

为什么这样做......

<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>

但这不是......

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

我得到第二个'System.Windows.Markup.XamlParseException：AG_E_PARSER_BAD_PROPERTY_VALUE'。该问题适用于Foreground转换器，绑定很好。

Answer 1

我认为问题是DataGridTextColumn的Foreground属性不是依赖属性，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的TextBlock的Foreground属性是依赖属性，因此是数据绑定的有效目标。

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