在Button.Click上更改ListBox.ItemsSource绑定属性？

Question

快速问题......

我有一个ListBox与它的ItemsSource属性绑定到一个集合属性在视图模型,如下所示:

<ListBox Name="CollectionsListBox" ItemsSource="{Binding Activity.Timesheets}" />

我Button在同一视图中也有两个对象.现在的问题是...我可以改变CollectionsListBox ItemsSource Binding从Activity.Timesheets到Activity.Attachments只使用XAML？

如果失败了,从viewmodel使用Command对象？

编辑>>>

我找到了一个简单的解决方案,使用RadioButtons代替Button了霍华德答案中的s:

<ListBox Name="CollectionsListBox">
    <ListBox.Style>
        <Style>
            <Style.Triggers>
                <DataTrigger Binding="{Binding ElementName=TimesheetsButton,Path=IsChecked}" Value="True">
                    <Setter Property="ListBox.ItemsSource" Value="{Binding Activity.Timesheets}" />
                    <Setter Property="ListBox.ItemContainerStyle" Value="{StaticResource TimesheetStyle}" />
                </DataTrigger>
                <DataTrigger Binding="{Binding ElementName=AttachmentsButton,Path=IsChecked}" Value="True">
                    <Setter Property="ListBox.ItemsSource" Value="{Binding Activity.Attachments}" />
                    <Setter Property="ListBox.ItemContainerStyle" Value="{StaticResource AttachmentStyle}" />
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </ListBox.Style>
</ListBox>

非常感谢您的帮助.

Answer 1

我不确定Button是否能做到这一点.但是radiobutton只能在XAML中满足你.

假设我们有两个枚举:

public enum E { A = 0, B = 1, C = 2 }
public enum F { G = 0, H = 1, L = 2 }

我在XAML中将它们定义为资源:

<ObjectDataProvider ObjectType="{x:Type sys:Enum}" MethodName="GetValues" x:Key="EProvider">
    <ObjectDataProvider.MethodParameters>
        <x:TypeExtension Type="{x:Type local:E}" />
    </ObjectDataProvider.MethodParameters>
</ObjectDataProvider>

<ObjectDataProvider ObjectType="{x:Type sys:Enum}" MethodName="GetValues" x:Key="FProvider">
    <ObjectDataProvider.MethodParameters>
        <x:TypeExtension Type="{x:Type local:F}" />
    </ObjectDataProvider.MethodParameters>
</ObjectDataProvider>

然后我们走了:

<ListBox x:Name="List1">
    <ListBox.Style>
        <Style>
            <Style.Triggers>
                <MultiDataTrigger>
                    <MultiDataTrigger.Conditions>
                        <Condition Binding="{Binding ElementName=Rdb1,Path=IsChecked}" Value="True"/>
                    </MultiDataTrigger.Conditions>
                    <Setter Property="ListBox.ItemsSource" Value="{Binding Source={StaticResource EProvider}}" />
                </MultiDataTrigger>
                <MultiDataTrigger>
                    <MultiDataTrigger.Conditions>
                        <Condition Binding="{Binding ElementName=Rdb2,Path=IsChecked}" Value="True"/>
                    </MultiDataTrigger.Conditions>
                    <Setter Property="ListBox.ItemsSource" Value="{Binding Source={StaticResource FProvider}}" />
                </MultiDataTrigger>
            </Style.Triggers>
        </Style>
    </ListBox.Style>
</ListBox>
<RadioButton x:Name="Rdb1" GroupName="Group1" />
<RadioButton x:Name="Rdb2" GroupName="Group1" />