C# 将文本绑定到数组中对象中的嵌套成员

我挑战自己在WPF中提出申请，我以前从未尝试过：）

也许这很明显，但我不明白我的错误在哪里

MyRecipePage正确显示零件

，但对于

（或1）不显示任何内容

我没有错，什么都没有

它是由

Recipe.AddDetails（）

不发送任何

PropertyChanged

事件引起的吗

提前感谢您的帮助：）

RecipePage.xaml

...
<Grid>
    <Button HorizontalAlignment="Left" Width="112" Height="29" VerticalAlignment="Top" Content="PRECEDENT" Margin="10"/>
    <StackPanel>
        <TextBlock Text="{Binding Name}" Style="{StaticResource h1}"></TextBlock>
        <StackPanel Orientation="Horizontal">
            <StackPanel>
                <TextBlock Text="{Binding Path=Details[0].PieceName}" Style="{StaticResource h2}"></TextBlock>
            ...
            </StackPanel>
            <StackPanel>
                <TextBlock Text="{Binding Path=Details[1].PieceName}" Style="{StaticResource h2}"></TextBlock>
            ...
            </StackPanel>
        </StackPanel>
    </StackPanel>
</Grid>
...

页面创建：

    private void OnBourguignonClick(object sender, RoutedEventArgs e)
    {
        var recipe = new Recipe("BOURGUIGNON ou SAUTE", 190, "images/recipes/rotideboeuf.jpg");
        recipe.AddDetails(new RecipeDetails("paleron", 6, 31));
        recipe.AddDetails(new RecipeDetails("sauté maigre", 190, 221));
        ((MainWindow)Application.Current.MainWindow)?.NavigationFrame.NavigationService.Navigate(new RecipePage(recipe));
    }

Recipe.cs

public partial class RecipePage : Page
{

    public RecipePage(Recipe recipe)
    {
        InitializeComponent();
        DataContext = recipe;
    }
}

public class Recipe : INotifyPropertyChanged
{
    public string Name { get; set; }

    public int MeatWeightPerPers { get; set; }

    public string ImagePath { get; set; }

    public RecipeDetails[] Details = new RecipeDetails[]{};

    public event PropertyChangedEventHandler PropertyChanged;

    public Recipe(string name, int meatWeight, string image)
    {
        Name = name;
        MeatWeightPerPers = meatWeight;
        ImagePath = image;
    }

    public void AddDetails(RecipeDetails details)
    {
        Details.Append(details);
    }
}

public class RecipeDetails : INotifyPropertyChanged
{
    public string PieceName { get; set; }
    public int PieceWeightPerCow { get; set; }
    public int NbPersPerCow { get; set; }

    public event PropertyChangedEventHandler PropertyChanged;

    public RecipeDetails(string pieceName, int pieceWeightPerCow, int nbPersPerCow)
    {
        PieceName = pieceName;
        PieceWeightPerCow= pieceWeightPerCow;
        NbPersPerCow = nbPersPerCow;
    }
}

RecipedDetails.cs

public partial class RecipePage : Page
{

    public RecipePage(Recipe recipe)
    {
        InitializeComponent();
        DataContext = recipe;
    }
}

public class Recipe : INotifyPropertyChanged
{
    public string Name { get; set; }

    public int MeatWeightPerPers { get; set; }

    public string ImagePath { get; set; }

    public RecipeDetails[] Details = new RecipeDetails[]{};

    public event PropertyChangedEventHandler PropertyChanged;

    public Recipe(string name, int meatWeight, string image)
    {
        Name = name;
        MeatWeightPerPers = meatWeight;
        ImagePath = image;
    }

    public void AddDetails(RecipeDetails details)
    {
        Details.Append(details);
    }
}

public class RecipeDetails : INotifyPropertyChanged
{
    public string PieceName { get; set; }
    public int PieceWeightPerCow { get; set; }
    public int NbPersPerCow { get; set; }

    public event PropertyChangedEventHandler PropertyChanged;

    public RecipeDetails(string pieceName, int pieceWeightPerCow, int nbPersPerCow)
    {
        PieceName = pieceName;
        PieceWeightPerCow= pieceWeightPerCow;
        NbPersPerCow = nbPersPerCow;
    }
}

FodyWeavers.xml（已安装）

---

主要问题是向

详细信息添加元素不会引发
CollectionChanged
事件。此事件在更改时由
ObservableCollection
自动引发，因此您希望使用该事件而不是数组：

public class Recipe : INotifyPropertyChanged
{
    public string Name { get; set; }

    public int MeatWeightPerPers { get; set; }

    public string ImagePath { get; set; }

    // Instead of array, use ObservableCollection
    public ObservableCollection<RecipeDetails> Details { get; set; }

    public event PropertyChangedEventHandler PropertyChanged;

    public Recipe(string name, int meatWeight, string image)
    {
        Name = name;
        MeatWeightPerPers = meatWeight;
        ImagePath = image;

        // Initialize Details collection
        Details = new ObservableCollection<RecipeDetails>();
    }

    public void AddDetails(RecipeDetails details)
    {
        Details.Add(details);
    }
}

你知道为什么我的详细信息
项目
是垂直堆叠而不是水平堆叠的，而我的
项目控件
父面板是
？你的
堆栈面板
只定向其内容，而不是
项目面板的内容。但是有一个解决办法：看哦，好的！我认为
ItemsControl
只在父容器中生成项。非常感谢。