silverlight – 在DataGridTemplateColumn内绑定命令

我的viewmodel附带View(XAML).当DataGrid的行上的按钮被点击时,我需要调用命令.我正在使用行为(正常命令有相同的问题).当我点击DataGrid上的按钮 – 我的命令没有被解雇.

为了说明问题 – 我将ListBox放在底部,与EXACT相同的绑定东西 – 是的,命令工作.所以,它是与DataGrid / DataGridTemplateColumn的东西

<Grid x:Name="LayoutRoot" Background="White" DataContext="{Binding}">
            <Grid.RowDeFinitions>
                <RowDeFinition Height="30" />
                <RowDeFinition Height="*" />
                <RowDeFinition Height="*" />
            </Grid.RowDeFinitions>
            <StackPanel Orientation="Horizontal">
                <Button Content="Cancel" >
                    <i:Interaction.Triggers>
                        <i:EventTrigger EventName="Click">
                            <ei:CallMethodAction MethodName="Cancel" Targetobject="{Binding}"/>
                        </i:EventTrigger>
                    </i:Interaction.Triggers>
                </Button>
            </StackPanel>
            <sdk:DataGrid AutoGenerateColumns="False" IsReadOnly="True" ItemsSource="{Binding Data}" Grid.Row="1">
                <sdk:DataGrid.Columns>
                    <sdk:DataGridTemplateColumn CanUserReorder="True" CanUserResize="True" CanUserSort="True" Width="Auto">
                        <sdk:DataGridTemplateColumn.CellTemplate>
                            <DataTemplate>
                                <Button Content="Select">
                                    <i:Interaction.Triggers>
                                        <i:EventTrigger EventName="Click">
                                            <i:InvokeCommandAction Command="{Binding ElementName=Control,Path=DataContext.ItemSelectedCommand}" CommandParameter="{Binding}" />
                                        </i:EventTrigger>
                                    </i:Interaction.Triggers>
                                </Button>  
                            </DataTemplate>
                        </sdk:DataGridTemplateColumn.CellTemplate>
                    </sdk:DataGridTemplateColumn>
                    <sdk:DataGridTextColumn Binding="{Binding deviceid}" CanUserReorder="True" CanUserResize="True" CanUserSort="True" Header="Device" Width="Auto" FontWeight="Bold" />
                    <sdk:DataGridTextColumn Binding="{Binding SerialNumber}" CanUserReorder="True" CanUserResize="True" CanUserSort="True" Header="Serial Number" Width="Auto" />
                    <sdk:DataGridTextColumn Binding="{Binding LastActivityOn}" CanUserReorder="True" CanUserResize="True" CanUserSort="True" Header="Last Activity" Width="Auto" />
                    <sdk:DataGridTextColumn Binding="{Binding ClientVersion}" CanUserReorder="True" CanUserResize="True" CanUserSort="True" Header="Client Version" Width="Auto" />
                    <sdk:DataGridTextColumn Binding="{Binding Osversion}" CanUserReorder="True" CanUserResize="True" CanUserSort="True" Header="OS Version" Width="Auto" />
                </sdk:DataGrid.Columns>

            </sdk:DataGrid>
            <ListBox Grid.Row="2" ItemsSource="{Binding Data}">
                <ListBox.ItemTemplate>
                    <DataTemplate>
                        <StackPanel Orientation="Horizontal">
                            <TextBlock Text="{Binding deviceid}"></TextBlock>
                            <Button Content="Select">
                                <i:Interaction.Triggers>
                                    <i:EventTrigger EventName="Click">
                                        <i:InvokeCommandAction Command="{Binding ElementName=Control,Path=DataContext.ItemSelectedCommand}" CommandParameter="{Binding}" />
                                    </i:EventTrigger>
                                </i:Interaction.Triggers>
                            </Button>
                        </StackPanel>                        
                    </DataTemplate>
                </ListBox.ItemTemplate>
            </ListBox>
        </Grid>

解决方法

我确实在一个DataGrid里,你仍然需要 DataContextProxy来绑定工作. ElementName绑定不起作用(是的,它适用于ListBox模板,但不适用于DataGrid,这是因为DataGridTemplateColumn不在视觉树中),即使在Silverlight 4中也是如此.

UPDATE

在Silverlight 5中,由于支持Ancestor绑定,DataGrid不需要DataContextProxy.

例

<Button Command="{Binding DataContext.CancelCommand,RelativeSource={RelativeSource AncestorType=sdk:DataGrid}}" />