c# – MVVM treeview wpf(绑定？)

抱歉没有问题.也许这不是一个问题 – 但我需要一个教程样本/
我正在尝试编写一个模型任务,以便在wpf中使用mvvm模式获得“方便”.我决定写一些像图书管理员的帮手.这是一个简单的wpf窗口,带有一个组合框(用于选择书籍是幻想还是sf),文本框(用于书名输入),按钮添加,以及树状视图,如下所示：

Books
  ------>ScienceFic
        ----->bookName1
        ----->bookName2
  ------->Fantasy
        ------>bookName3

我从视图中看绑定和分离视图模型有一些困难.
你可以帮帮我吗？

public enum LibraryType
{
    ScienceFic,Fantasy
}
    Class Model: INotifyPropertyChanged
    {
     private int bookId;
     private string bookName;
     private LibraryType bookType;
     public event PropertyChangedEventHandler PropertyChanged;
        //....and for all this fields  I have used a INotifyPropertyChanged as 
    /*
    https://stackoverflow.com/questions/1315621/implementing-inotifypropertychanged-does-a-better-way-exist
    */
    }

在这一点上,我认为MODEL已经完成了.

现在关于VIEW：
我只需打开MainWindow的编辑器并手动添加按钮,文本框,组合框和树视图.
加入后

comboBox1.ItemsSource = Enum.GetValues(typeof(LibraryType)).Cast<LibraryType>();
 comboBox1.SelectedIndex = 0;

我用正确类型的书初始化了我的组合)))但是((我在代码中完成了这个,而不是在XAML中 – 这对于MVVM绑定是否正确？(第一个问题)
接下来,我将我的textBox文本绑定(如我想的那样)到ViewModel中的当前book name属性(我在XAML中这样做了)：

<TextBox Text="{Binding Path=CurrentBookName}"/>

这是正确的吗？ (第二个问题)

最后,VIEWMODEL

Class ViewModel
{
  private string currentBookName;
  private LibraryType selectedBookType;
  public event PropertyChangedEventHandler PropertyChanged;
  //also properties and  OnPropertyChanged/SetField functions like in Model class

  //and finally I have created two lists for book storing
  private List<Model> sfStorage = new List<Model>();
  private List<Model> fantasyStorage = new List<Model>();
  //and simple getters for this two lists,like:
  public List<Model> GetSFStorage
  {
   get{return this.sfStorage;}
  }
  //and a simple function for addition of new books
  //that I plan to call when AddButton pressed
  public void Addition(???)
        {
            if (!string.IsNullOrEmpty(currentBookName))
            {
                //? I have add CurrentBookName in XAML of View (see above)
                //?but is it enough to have a property of CurrentBookType
                //to grant that a valide value from combobox will be here?
                var modelNewBook = new Model(CurrentBookName,CurrentBookType);
                switch (selectedBookType)
                {
                    case LibraryType.ScienceFic:
                        sfStorage.Add(modelNewBook);
                        break;
                    case LibraryType.Fantasy:
                        fantasyStorage.Add(modelNewBook);
                        break;
                    default:
                        return;
                }
            }
}

现在我只是走出成功的一小部分(可能)但是,我怎么能连接
在xaml或代码中使用这两个列表的treeView以及如何调用Addition函数
按下Addbutton时(第三个和主要问题)？
也许,这是noob问题,但我真的需要一个样本.
并且,(或许)这个问题对于试图理解MVVM和绑定的其他人会有所帮助.

internal class Book : NotifyPropertyChangedBase
{
    private string name;
    private BookType type;
    public BookType Type
    {
       get => this.type;
    }
    set
    {
        this.SetProperty( ref this.type,value );
    }
}

public string Name
{
    get => return this.name;
    set
    {
        this.SetProperty( ref this.name,value );
    }
}

private readonly List<Book> books;

public MainViewModel( )
{
    this.books = new List<Book>
    {
        new Book
        {
            Name = "Book 1",Type = BookType.Fantasy
        },new Book
        {
            Name = "Book 2",new Book
        {
            Name = "Book 3",new Book
        {
            Name = "Book 4",Type = BookType.SciFi
        }
    };
}

public ICollectionView Books
{
    get
    {
        var source = CollectionViewSource.GetDefaultView( this.books );
        source.GroupDescriptions.Add( new PropertyGroupDescription( "Type" ) 
    );
    return source;
}

<TreeView ItemsSource="{Binding Books.Groups}">
  <TreeView.ItemTemplate>
    <HierarchicalDataTemplate ItemsSource="{Binding Items}">
      <TextBlock Text="{Binding Name}" />
    </HierarchicalDataTemplate>
  </TreeView.ItemTemplate>
</TreeView>