C# WPF TreeView绑定命令并传递单击的元素

如何将命令绑定到TreeView中的元素。我有一个带有TreeView命令的MainWindowViewModel，我试图在元素周围添加按钮，但该命令不被调用。是否有其他方法调用命令并传递单击的元素

<TreeView x:Name="MainTreeView" HorizontalAlignment="Stretch" Margin="10" VerticalAlignment="Stretch" ItemsSource="{Binding Departments}">
        <TreeView.ItemTemplate>
            <HierarchicalDataTemplate ItemsSource="{Binding Positions}" DataType="{x:Type VM:Department}">
                <Button Command="{Binding TreeViewCommand}" CommandParameter="{Binding DepartmentName}" BorderThickness="0" Style="{StaticResource {x:Static ToolBar.ButtonStyleKey}}" >
                    <Label Content="{Binding DepartmentName}"/>
                </Button>
                <HierarchicalDataTemplate.ItemTemplate>
                    <HierarchicalDataTemplate ItemsSource="{Binding Employees}" DataType="{x:Type VM:Position}">
                        <Button BorderThickness="0" Style="{StaticResource {x:Static ToolBar.ButtonStyleKey}}" >
                        <Label Content="{Binding PositionName}"/>
                        </Button>
                        <HierarchicalDataTemplate.ItemTemplate>
                            <DataTemplate DataType="{x:Type VM:Employee}">
                                <Button BorderThickness="0" Style="{StaticResource {x:Static ToolBar.ButtonStyleKey}}" >
                                <Label Content="{Binding EmployeeName}"/>
                                </Button>
                            </DataTemplate>
                        </HierarchicalDataTemplate.ItemTemplate>
                    </HierarchicalDataTemplate>
                </HierarchicalDataTemplate.ItemTemplate>
            </HierarchicalDataTemplate>
        </TreeView.ItemTemplate>
    </TreeView>

我的主窗口视图模式是

public class MainWindowViewModel : ViewModelBase
{

    private List<Department> departments;
    public MyICommand<string> TreeViewCommand { get; private set; }

    public MainWindowViewModel()
    {
        TreeViewCommand = new MyICommand<string>(myTreeViewCommand);
        Departments = new List<Department>()
        {
            new Department("DotNet"),
            new Department("PHP")
        };
    }

    public List<Department> Departments
    {
        get
        {
            return departments;
        }
        set
        {
            departments = value;
            OnPropertyChanged("Departments");
        }
    }

    public void myTreeViewCommand(string par) 
    {
        Console.ReadKey();
    }
}

公共类MainWindowViewModel:ViewModelBase { 私人名单部门； 公共MyICommand树视图命令{get；private set；} 公共主窗口视图模型（） { TreeViewCommand=新的MyICommand（myTreeViewCommand）； 部门=新列表（） { 新部门（“DotNet”）， 新部门（“PHP”） }; } 公开名单部门 { 得到 { 返回部门； } 设置 { 部门=价值； 房地产变更（“部门”）； } } 公共无效myTreeViewCommand（字符串参数） { Console.ReadKey（）； } }

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由于您的TreeView命令位于TreeView范围内，因此它将Departments对象作为其DataContext，因此无法找到该命令。您应该明确定义定义TreeViewCommand的DataContext。请执行以下操作：

<!-- Note the ElementName and Path=DataContext. -->
<Button Command="{Binding ElementName=MainTreeView, Path=DataContext.TreeViewCommand}" CommandParameter="{Binding DepartmentName}" BorderThickness="0" Style="{StaticResource {x:Static ToolBar.ButtonStyleKey}}" >
    <Label Content="{Binding DepartmentName}"/>
</Button>

所有节点的XAML：

<TreeView x:Name="MainTreeView" HorizontalAlignment="Stretch" Margin="10" VerticalAlignment="Stretch" ItemsSource="{Binding Departments}">
    <TreeView.ItemTemplate>
        <HierarchicalDataTemplate ItemsSource="{Binding Positions}">
            <Button Command="{Binding ElementName=MainTreeView, Path=DataContext.TreeViewCommand}" CommandParameter="{Binding DepartmentName}" BorderThickness="0" Style="{StaticResource {x:Static ToolBar.ButtonStyleKey}}" >
                <Label Content="{Binding DepartmentName}"/>
            </Button>
            <HierarchicalDataTemplate.ItemTemplate>
                <HierarchicalDataTemplate ItemsSource="{Binding Employees}">
                    <Button Command="{Binding ElementName=MainTreeView, Path=DataContext.TreeViewCommand}" CommandParameter="{Binding PositionName}" BorderThickness="0" Style="{StaticResource {x:Static ToolBar.ButtonStyleKey}}" >
                        <Label Content="{Binding PositionName}"/>
                    </Button>
                    <HierarchicalDataTemplate.ItemTemplate>
                        <DataTemplate>
                            <Button Command="{Binding ElementName=MainTreeView, Path=DataContext.TreeViewCommand}" CommandParameter="{Binding EmployeeName}" BorderThickness="0" Style="{StaticResource {x:Static ToolBar.ButtonStyleKey}}" >
                                <Label Content="{Binding EmployeeName}"/>
                            </Button>
                        </DataTemplate>
                    </HierarchicalDataTemplate.ItemTemplate>
                </HierarchicalDataTemplate>
            </HierarchicalDataTemplate.ItemTemplate>
        </HierarchicalDataTemplate>
    </TreeView.ItemTemplate>
</TreeView>

---

注意！如果最终希望传递对象而不是字符串（节点名称），则必须为每个按钮定义ICommand。

谢谢！！这就是我需要的@菲利普菲利波维奇很乐意帮忙！：）我还为您添加了一个完整的XAML示例。看看这个。