如何绑定treeView 中右键菜单 MenuItem 的Command
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悬赏园豆：10
[待解决问题]
有个关于WPF 中TreeView ContextMenu MenuItem 右键菜单，绑定Command的问题，请教大家一下代码如下
1 <Controls:EverTreeView HorizontalAlignment="Left" Height="364" Margin="26,52,0,0" Name="ResourecesTreeView" EverSelectedItem="{Binding SelectedTreeViewItem}" ItemsSource="{Binding ResourcesSettingModel.TvResourceGroup,Mode=TwoWay}" VerticalAlignment="Top" Width="256" > 2 <Controls:EverTreeView.Resources> 3 4 5 6 <ContextMenu x:Key="treeViewOperation"> 7 <MenuItem Header="添加" Command="{Binding DataContext.MenuAddCommand, RelativeSource={RelativeSource AncestorType=ContextMenu}}"/> 8 <MenuItem Header="修改" /> 9 10 11 <MenuItem Header="删除" /> 12 13 14 </ContextMenu> 15 16 </Controls:EverTreeView.Resources> 17 18 <Controls:EverTreeView.ItemContainerStyle> 19 <!-- 20 This Style binds a TreeViewItem to a PersonViewModel. 21 --> 22 <Style TargetType="{x:Type TreeViewItem}" > 23 <Setter Property="IsExpanded" Value="{Binding ResourcesSettingModel.IsResourceTreeExpanded, Mode=TwoWay}" /> 24 <Setter Property="IsSelected" Value="{Binding ResourcesSettingModel.IsResourceTreeSelected, Mode=TwoWay}" /> 25 26 <Setter Property="FontWeight" Value="Normal" /> 27 28 <Style.Triggers> 29 <Trigger Property="IsSelected" Value="True"> 30 <Setter Property="FontWeight" Value="Bold" /> 31 </Trigger> 32 </Style.Triggers> 33 <!-- We have to select the item which is right-clicked on --> 34 35 36 37 </Style> 38 </Controls:EverTreeView.ItemContainerStyle> 39 40 <Controls:EverTreeView.ItemTemplate> 41 <HierarchicalDataTemplate ItemsSource="{Binding ChildTreeViewItems}" > 42 <TextBlock Text="{Binding NodeName}" ContextMenu="{StaticResource treeViewOperation}" /> 43 </HierarchicalDataTemplate> 44 45 </Controls:EverTreeView.ItemTemplate> 46 47 </Controls:EverTreeView>
1 public class ResourcesSettingViewModel : SoftGuidanceViewModelBase 2 { 3 #region Contructor 4 public ResourcesSettingViewModel() 5 : this(new ResourcesSettingModel()) 6 { 7 8 } 9 public ResourcesSettingViewModel(ResourcesSettingModel resourcesSettingModel) 10 { 11 this.resourcesSettingModel = resourcesSettingModel; 12 13 } 14 #endregion 15 #region Variables 16 17 private ResourcesSettingModel resourcesSettingModel; 18 19 #endregion 20 #region Properties 21 public ResourcesSettingModel ResourcesSettingModel 22 { 23 get { return this.resourcesSettingModel; } 24 } 25 private EverTreeViewItem selectedTreeViewItem; 26 27 28 public EverTreeViewItem SelectedTreeViewItem 29 { 30 get { return this.selectedTreeViewItem; } 31 set 32 { 33 if (this.selectedTreeViewItem == value) 34 { 35 return; 36 } 37 this.selectedTreeViewItem = value; 38 this.RaisePropertyChanged(() => this.SelectedTreeViewItem); 39 } 40 } 41 42 43 #endregion 44 #region Command 45 public ICommand MenuAddCommand 46 { 47 get 48 { 49 return new DelegateCommand(()=> 50 51 { 52 MessageBox.Show(""); 53 }); 54 } 55 } 56 57 58 59 60 61 #endregion 62 63 //private EverTreeViewItem GetSelectdTreeViewItem() 64 //{ 65 // EverTreeViewItem treeViewItem = (EverTreeViewItem)SelectedTreeViewItem; 66 // return treeViewItem; 67 //} 68 }
在绑定menuitem Command 的时候怎么也触发不了，求解？？？
我用的事prism 框架
所有回答(4)
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Command="{Binding DataContext.MenuAddCommand, RelativeSource={RelativeSource AncestorType=ContextMenu}}"
这里的Source搞错了吧，应该是你在页面中的ResourcesSettingViewModel对象，仔细检查一下~
你是说这样吗 <MenuItem Header="添加" Command="{Binding ResourcesSettingViewModel.MenuAddCommand, RelativeSource={RelativeSource AncestorType=ContextMenu}}"/>
@Rafferty: 你是说<MenuItem Header="添加" Command="{Binding MenuAddCommand}/>
@Rafferty: 你在页面中应该类似于
<Resource>
<XXX:ResourcesSettingViewModel x:Key="resourcesSettingViewModel" />
</Resource>
这样一个资源吧， 在Command绑定的时候source就是这个资源
如果按照这样来写，那就是 Command={Binding MenuAddCommand, Source={StaticResource resourcesSettingViewModel}}
-1
在WPF中TreeView和ContextMenu在视觉树上是分开的也就是，ContextMenu上的DataContext就没有绑定任何ViewModel。
http://stackoverflow.com/questions/3668654/relativesource-binding-from-a-tooltip-or-contextmenu
-1
这个问题我已经解决，不知道你还需要解决方案否？如果需要，白天我发个博客来解答。
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不用命令模式，换个比的方式：吧ContextMenu作为ViewModel中的一个属性，在MenuItem的Click事件里写代码。
