Question

如何绑定按钮的命令＆＃34; myCmdButton＆＃34;到ParameterVariableList，就像＆＃34; addBtn＆＃34;做。＆＃34; addBtn＆＃34;工作得像预期。我也想要另一个按钮命令到我的ParameterVariableList类。

这是XAML：

<DataTemplate DataType="{x:Type locale:ParameterVariableList}" >
    <StackPanel Orientation="Vertical">

        <TextBlock Text="{Binding Description}"/>
        <Button Content="add" Command="{Binding AddEntryCmd}" Name="addBtn" />

        <ListBox ItemsSource="{Binding ItemList, UpdateSourceTrigger=PropertyChanged}" HorizontalAlignment="Stretch" >
            <ListBox.ItemTemplate>
                <ItemContainerTemplate>
                    <StackPanel Orientation="Horizontal">

                        <TextBlock Text="{Binding}" />

                        <Button Width="{Binding ActualHeight, RelativeSource={RelativeSource Self}}" Command="{Binding RemoveEntryCmd, ???}" Name="myCmdButton" >
                            <Image Source="Resources/trash_16x16.png" Stretch="None" VerticalAlignment="Center" HorizontalAlignment="Center" />
                        </Button>

                    </StackPanel>
                </ItemContainerTemplate>
            </ListBox.ItemTemplate>
        </ListBox>
    </StackPanel>
</DataTemplate>

我希望这可行，但它没有：

Command="{Binding RemoveEntryCmd, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type locale:ParameterVariableList}}}"

错误： System.Windows.Data错误：4：找不到用于绑定的源代码＆＃39; RelativeSource FindAncestor，AncestorType =＆＃39; hmi.ParameterVariableList＆＃39;，AncestorLevel =＆＃39; 1＆＃39;＆＃39; 。 BindingExpression：路径= RemoveEntryCmd;的DataItem = NULL;目标元素是＆＃39;按钮＆＃39; （名称=＆＃39;＆＃39）;目标财产是＆＃39; Command＆＃39; （键入＆＃39; ICommand＆＃39;）

Answer 1

这应该有效

Command="{Binding RemoveEntryCmd,RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type ListBox}}}

Answer 2

这有效：

Command="{Binding DataContext.RemoveEntryCmd, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ListBox}}}"

几乎是Abhinav的答案，但DataContext丢失了。

如何将命令绑定到它的＆＃34; TemplatedParent＆＃34;

2 个答案: