结合内DataGridTemplateColumn命令 [英] Binding Command inside DataGridTemplateColumn
问题描述
我有视图（XAML附带）贴在我的ViewModel与命令。我需要调用命令时DataGrid的行按钮点击。我使用的行为，这（常规指挥有同样的问题）。当我点击按钮的DataGrid - 我的命令不被解雇
要说明的问题 - 我把列表框的底部有相同的约束力的东西 - 是的，指挥的作品。所以，这是一些与数据网格/ DataGridTemplateColumn
＆LT;电网X：NAME =LayoutRoot背景=白的DataContext ={结合}＆GT;
＆LT; Grid.RowDefinitions＆GT;
＆所述; RowDefinition高度=30/＆GT;
＆LT; RowDefinition高度=*/＆GT;
＆LT; RowDefinition高度=*/＆GT;
＆LT; /Grid.RowDefinitions>
＆LT; StackPanel的方向=横向＆GT;
＆LT;按钮内容=取消＆GT;
＆LT; I：Interaction.Triggers＆GT;
＆LT; I：的EventTrigger事件名称=点击＆GT;
＆LT; EI：CallMethodAction方法名=取消TargetObject ={结合}/＆GT;
＆LT; /我：＆的EventTrigger GT;
＆LT; /我：Interaction.Triggers＆GT;
＆LT; /按钮＆GT;
＆LT; / StackPanel的＆GT;
＆LT; SDK：数据网格的AutoGenerateColumns =FALSEIsReadOnly =真的ItemsSource ={绑定数据}Grid.Row =1＆GT;
＆LT; SDK：DataGrid.Columns＆GT;
＆LT; SDK：DataGridTemplateColumn CanUserReorder =真CanUserResize =真CanUserSort =真WIDTH =自动＆GT;
＆LT; SDK：DataGridTemplateColumn.CellTemplate＆GT;
＆LT;＆DataTemplate的GT;
＆LT;按钮内容=选择＆GT;
＆LT; I：Interaction.Triggers＆GT;
＆LT; I：的EventTrigger事件名称=点击＆GT;
＆LT; I：InvokeCommandAction命令={绑定的ElementName =控制，路径= DataContext.ItemSelectedCommand}CommandParameter ={结合}/＆GT;
＆LT; /我：＆的EventTrigger GT;
＆LT; /我：Interaction.Triggers＆GT;
＆LT; /按钮＆GT;
＆LT; / DataTemplate中＆GT;
＆LT; / SDK：DataGridTemplateColumn.CellTemplate＆GT;
＆LT; / SDK：DataGridTemplateColumn＆GT;
＆LT; SDK：DataGridTextColumn绑定={结合DEVICEID}CanUserReorder =真CanUserResize =真CanUserSort =真标题=设备WIDTH =自动粗细=大胆/＆GT;
＆LT; SDK：DataGridTextColumn绑定={结合的SerialNumber}CanUserReorder =真CanUserResize =真CanUserSort =真标题=序列号WIDTH =自动/＆GT;
＆LT; SDK：DataGridTextColumn绑定={结合LastActivityOn}CanUserReorder =真CanUserResize =真CanUserSort =真标题=最近活动WIDTH =自动/＆GT;
＆LT; SDK：DataGridTextColumn绑定={结合客户机版本}CanUserReorder =真CanUserResize =真CanUserSort =真标题=客户端版本WIDTH =自动/＆GT;
＆LT; SDK：DataGridTextColumn绑定={结合OSVERSION}CanUserReorder =真CanUserResize =真CanUserSort =真标题=操作系统版本WIDTH =自动/＆GT;
＆LT; / SDK：DataGrid.Columns＆GT; ＆LT; / SDK：DataGrid的＆GT;
＆LT;列表框Grid.Row =2的ItemsSource ={绑定数据}＆GT;
＆LT; ListBox.ItemTemplate＆GT;
＆LT;＆DataTemplate的GT;
＆LT; StackPanel的方向=横向＆GT;
＆LT; TextBlock的文本={结合DEVICEID}＆GT;＆LT; / TextBlock的＆GT;
＆LT;按钮内容=选择＆GT;
＆LT; I：Interaction.Triggers＆GT;
＆LT; I：的EventTrigger事件名称=点击＆GT;
＆LT; I：InvokeCommandAction命令={绑定的ElementName =控制，路径= DataContext.ItemSelectedCommand}CommandParameter ={结合}/＆GT;
＆LT; /我：＆的EventTrigger GT;
＆LT; /我：Interaction.Triggers＆GT;
＆LT; /按钮＆GT;
＆LT; / StackPanel的＆GT;
＆LT; / DataTemplate中＆GT;
＆LT; /ListBox.ItemTemplate>
＆LT; /列表框＆GT;
＆LT; /网格和GT;
我是pretty确保在的DataGrid ，你仍然需要在<一个href=\"http://weblogs.asp.net/dwahlin/archive/2009/08/20/creating-a-silverlight-datacontext-proxy-to-simplify-data-binding-in-nested-controls.aspx\">DataContextProxy使绑定工作。本的ElementName绑定不起作用（是的，它正在为的ListBox 模板，但不是的DataGrid ，这是因为DataGridTemplateColumn是不是在视觉树），即使在Silverlight 4中。
更新
在Silverlight 5， DataContextProxy 不需要在的DataGrid 感谢支持的祖先结合。
示例
＆LT;按钮命令={结合DataContext.CancelCommand，的RelativeSource = {的RelativeSource AncestorType = SDK：DataGrid中}}/＆GT;
I have View(XAML included) attached to my ViewModel with commands. I need to invoke command when Button on DataGrid's row clicked. I'm using behaviors for this (regular commanding have same issue). When I click button on DataGrid - my command does not get fired.
To illustrate issue - I placed ListBox on a bottom with EXACT same binding stuff - and yes, command works. So, it's something with DataGrid/DataGridTemplateColumn
<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>
I am pretty sure inside a DataGrid, you still need the DataContextProxy to make bindings working. The ElementName binding doesn't work (yes, it is working for ListBox templates, but not DataGrid, this is because DataGridTemplateColumn is not in the visual tree), even in Silverlight 4.
UPDATE
In Silverlight 5, DataContextProxy is not needed in a DataGrid thanks to the support of Ancestor binding.
Example
<Button Command="{Binding DataContext.CancelCommand, RelativeSource={RelativeSource AncestorType=sdk:DataGrid}}" />
这篇关于结合内DataGridTemplateColumn命令的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
