我将分层集合绑定到 RadTreeView ,效果很好。我现在想要根据名为PermissionID的布尔属性的值禁用项目。
当我尝试这个时,我的模块的InitializeComponent
(这是一个PRISM应用程序)失败,但有例外:
{System.Windows.Markup.XamlParseException: Set property '' threw an exception. [Line: 19 Position: 48] ---> System.NotSupportedException: Cannot set read-only property ''.
at MS.Internal.XamlMemberInfo.SetValue(Object target, Object value)
at MS.Internal.XamlManagedRuntimeRPInvokes.SetValue(XamlTypeToken inType, XamlQualifiedObject& inObj, XamlPropertyToken inProperty, XamlQualifiedObject& inValue)
--- End of inner exception stack trace ---
at System.Windows.Application.LoadComponent(Object component, Uri resourceLocator)
at InventoryModule.Views.NavigationView.InventoryNavigation.InitializeComponent()
at InventoryModule.Views.NavigationView.InventoryNavigation..ctor()}
看起来它说IsEnabled属性是只读的,但事实并非如此。
这是我的XAML:
<UserControl.Resources>
<telerik:HierarchicalDataTemplate x:Key="ItemTemplate" ItemsSource="{Binding vw_Module_Access_Permissions_1}">
<TextBlock Text="{Binding Module_Function_Caption}" />
</telerik:HierarchicalDataTemplate>
<Style x:Key="ItemContainerStyle" TargetType="telerikNavigation:RadTreeViewItem">
<Setter Property="IsExpanded" Value="True"/>
<Setter Property="IsEnabled" Value="{Binding Path=PermissionID}" />
</Style>
</UserControl.Resources>
<Grid x:Name="LayoutRoot" Background="White">
<telerikNavigation:RadTreeView x:Name="InventoryNavigationTree" ItemContainerStyle="{StaticResource ItemContainerStyle}" ItemsSource="{Binding SecuredModuleFunctions}"
ItemTemplate="{StaticResource ItemTemplate}">
<i:Interaction.Triggers>
<i:EventTrigger EventName="MouseLeftButtonUp">
<inf:InvokeDelegateCommandAction Command="{Binding OpenView}" CommandParameter="{Binding ElementName=InventoryNavigationTree, Path=SelectedItem}"></inf:InvokeDelegateCommandAction>
</i:EventTrigger>
</i:Interaction.Triggers>
</telerikNavigation:RadTreeView>
</Grid>
答案 0 :(得分:2)
这是Silverlight吗?
Silverlight中还没有Style绑定(来自Silverlight 5.0)
Telerik有“容器绑定”,它以类似的方式运行,但是在DataTemplate上设置而不是在样式上设置:
http://www.telerik.com/support/kb/silverlight/treeview/radtreeview-and-hierarchicaldatatemplate.aspx
来自他们的文档:
<telerik:ContainerBindingCollection x:Name="BindingsCollection">
<telerik:ContainerBinding PropertyName="IsSelected" Binding="{Binding Selected, Mode=TwoWay}" />
<telerik:ContainerBinding PropertyName="IsExpanded" Binding="{Binding Expanded, Mode=TwoWay}" />
</telerik:ContainerBindingCollection>
然后将其附加到DataTemplate:
telerik:ContainerBinding.ContainerBindings="{StaticResource BindingsCollection}"
希望这适用于您的情况