具有多种类型的wpf树视图

Question

我一直在浏览教程并在线阅读一些关于树视图中多种类型的文章。但是，我没有遇到过解释如何构建或处理包含多个嵌套的不同节点类型的树视图的教程。例如考虑一个典型的文件夹结构。一个文件夹可以包含文件和文件夹，其中的文件夹可以包含更多的文件和文件夹。因此，我试图将其分解为一个简单的解决方案，希望有人可以修改/向我解释如何让一个家庭嵌套在另一个家庭中，如下图所示。另一个堆栈溢出的链接没有详细解释 INode 接口是如何工作的。

根据我的阅读，我知道我需要三个课程。

1. 第 1 类：FamilyNode

   • 该类包含 3 个属性 Members、Name、Parent

2. 第 2 类：家庭成员

   • 该类包含 2 个属性名称、年龄

3. 第 3 类：INode

   • 此类包含 1 个属性名称。为此类创建 INode 接口将允许我们在 Treeview 中创建所需的每个内容项的不同实现。我相信这个类的一个例子会像这样......

---

public interface INode
{
     string Name { get; }
     string Path { get; }
}

---

下面是上图中“当前”下的代码。我知道它没有以最好的方式组织起来，我只是想得到一个简单的例子和​​解释。我希望你们能提供帮助，这很费时间研究。我只是可以围绕如何制作可能是 Family 或 FamilyMember 类型的节点集合，然后开始构建树视图。谢谢大家的帮助。

ViewModel.cs

using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Runtime.CompilerServices;

    namespace WpfApplication1
    {
        public class ViewModel : INotifyPropertyChanged
        {
            private ObservableCollection<Family> families;
            public ObservableCollection<Family> Families
            {
                get { return families; }
                set
                {
                    families = value;
                    NotifyPropertyChanged("Families");
                }
            }

            public ViewModel()
            {
                // FAMILIES
                Families = new ObservableCollection<Family>();

                Family family1 = new Family() { Name = "The Doe's" };
                family1.Members.Add(new FamilyMember() { Name = "John Doe", Age = 42 });
                family1.Members.Add(new FamilyMember() { Name = "Jane Doe", Age = 39 });
                family1.Members.Add(new FamilyMember() { Name = "Sammy Doe", Age = 13 });
                Families.Add(family1);

                Family family2 = new Family() { Name = "The Moe's" };
                family2.Members.Add(new FamilyMember() { Name = "Mark Moe", Age = 31 });
                family2.Members.Add(new FamilyMember() { Name = "Norma Moe", Age = 28 });
                Families.Add(family2);
            }

            public event PropertyChangedEventHandler PropertyChanged;

            public void NotifyPropertyChanged([CallerMemberName] string propertyName = null)
            {
                PropertyChangedEventHandler handler = PropertyChanged;
                if (handler != null)
                {
                    handler(this, new PropertyChangedEventArgs(propertyName));
                }
            }
        }

        public class Family
        {
            public Family()
            {
                this.Members = new ObservableCollection<FamilyMember>();
            }

            public string Name { get; set; }
            public ObservableCollection<FamilyMember> Members { get; set; }
        }

        public class FamilyMember
        {
            public string Name { get; set; }
            public int Age { get; set; }
        }
    }

MainWindow.Xaml

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:self="clr-namespace:WpfApplication1"
        Title="MainWindow" Height="350" Width="305"
        WindowStartupLocation="CenterScreen">

    <Window.DataContext>
        <self:ViewModel/>
    </Window.DataContext>

    <Grid>
        <TreeView Name="trvFamilies" ItemsSource="{Binding Families}" Grid.Row="1" Grid.ColumnSpan="2">
            <TreeView.Resources>
                <HierarchicalDataTemplate DataType="{x:Type self:Family}" ItemsSource="{Binding Members}">
                    <StackPanel Orientation="Horizontal">
                        <Label VerticalAlignment="Center" FontFamily="WingDings" Content="1"/>
                        <TextBlock Text="{Binding Name}" />
                    </StackPanel>
                </HierarchicalDataTemplate>
                <DataTemplate DataType="{x:Type self:FamilyMember}">
                    <StackPanel Orientation="Horizontal">
                        <Label VerticalAlignment="Center" FontFamily="WingDings" Content="2"/>
                        <TextBlock Text="{Binding Name}" />
                    </StackPanel>
                </DataTemplate>
            </TreeView.Resources>
        </TreeView>
    </Grid>

</Window>

Answer 1

我想出了解决方案与朋友交谈，并认为我会在这里发布。

ViewModel.cs

using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Runtime.CompilerServices;

namespace WpfApplication1
{
    public class ViewModel : INotifyPropertyChanged
    {
        private ObservableCollection<INode> families;
        public ObservableCollection<INode> Families
        {
            get { return families; }
            set
            {
                families = value;
                NotifyPropertyChanged("Families");
            }
        }

        public ViewModel()
        {
            // FAMILIES
            Families = new ObservableCollection<INode>();

            Family family1 = new Family() { Name = "The Doe's" };
            family1.Members.Add(new FamilyMember() { Name = "John Doe", Age = 42 });
            family1.Members.Add(new FamilyMember() { Name = "Jane Doe", Age = 39 });
            family1.Members.Add(new FamilyMember() { Name = "Sammy Doe", Age = 13 });
            Families.Add(family1);

            Family family2 = new Family() { Name = "The Moe's" };
            family2.Members.Add(new FamilyMember() { Name = "Mark Moe", Age = 31 });
            family2.Members.Add(new FamilyMember() { Name = "Norma Moe", Age = 28 });
            Families.Add(family2);

            Family family3 = new Family() { Name = "The Dunkin's" };
            family3.Members.Add(new FamilyMember() { Name = "Kevin Dunkin", Age = 31 });
            family3.Members.Add(new FamilyMember() { Name = "Breana Dunkin", Age = 28 });
            family2.Members.Add(family3);
        }

        public event PropertyChangedEventHandler PropertyChanged;

        public void NotifyPropertyChanged([CallerMemberName] string propertyName = null)
        {
            PropertyChangedEventHandler handler = PropertyChanged;
            if (handler != null)
            {
                handler(this, new PropertyChangedEventArgs(propertyName));
            }
        }
    }

    public interface INode
    {
        string Name { get; }
    }

    public class Family : INode
    {
        public Family()
        {
            this.Members = new ObservableCollection<INode>();
        }

        public string Name { get; set; }
        public ObservableCollection<INode> Members { get; set; }
        public Family Parent { get; private set; }
    }

    public class FamilyMember : INode
    {
        public string Name { get; set; }
        public int Age { get; set; }
    }
}