二维 int 数组自定义 dependencyProperty 绑定不起作用

Question

绑定源

    private int[,] _map = new int[22, 12] 
    {
        { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 },
        { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
        { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 },
    };
    public int[,] Map
    {
        get => _map;
        set => SetProperty(ref _map, value);
    }

依赖属性

public static readonly DependencyProperty MapArrayProperty =
        DependencyProperty.Register
        (
            "MapArray",
            typeof(int[,]),
            typeof(MapControl),
            new PropertyMetadata
            (
                null,
                new PropertyChangedCallback(MapArrayChanged)
            )
        );

    private static void MapArrayChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
    {
        MapControl map = (MapControl)d;
        map.MapChanged();
    }

    public int[,] MapArray
    {
        get
        {
            return (int[,])GetValue(MapArrayProperty);
        }
        set
        {
            SetValue(MapArrayProperty, value);
        }
    }

    private void MapChanged()
    {
        for(int i = 0; i<MapArray.GetLength(0); i++)
        {
            for(int j = 0; j<MapArray.GetLength(1); j++)
            {
                Grid grid = new Grid();
                grid.Background = ColorSeletor(MapArray[i, j]);
                Grid.SetRow(grid, i);
                Grid.SetColumn(grid, j);
                GridMap.Children.Add(grid);
            }
        }
    }

开始按钮绑定源码

    public ICommand StartCommand
    {
        get;
        set;
    }
    private void RandomBlockSelector()
    {
        IDefaultBlock defaultBlock = null;
        Random r = new Random();
        int selectedblock = r.Next(2, 9);
        switch (selectedblock)
        {
            case 2:
                defaultBlock = new IBlock();
                break;
            case 3:
                defaultBlock = new JBlock();
                break;
            case 4:
                defaultBlock = new LBlock();
                break;
            case 5:
                defaultBlock = new OBlock();
                break;
            case 6:
                defaultBlock = new SBlock();
                break;
            case 7:
                defaultBlock = new TBlock();
                break;
            case 8:
                defaultBlock = new ZBlock();
                break;
        }
        InsertBlock(defaultBlock.BlockArray);
    }

    private void InsertBlock(int[,] blockShape)
    {
        for(int i = 4; i<8; i++)
        {
            for(int j = 1; j<5; j++)
            {
                Map[i, j] = blockShape[i - 4, j - 1];
            }
        }
    }

    private void Start()
    {
        RandomBlockSelector();
    }

如果我启动应用程序，则绑定正常

但是如果我点击按钮，绑定不起作用我想当我点击按钮修改数组时必须修改数组和属性更改事件必须发生才能更改视图

如果有其他绑定二维数组的方法请告诉我要么你能在我的代码中找到错误吗

单击按钮后，如果它有效，视图中应该显示此内容

Answer 1

首先是免责声明：

WPF、Windows 表单和其他桌面应用程序格式不是游戏开发的正确工具。正确的工具是带有 game loop. XNA is slightly dated, but there is a whole list of possible current frontends.

的任何东西

问题是您的 collection 没有更改通知以防 collection 值发生变化。您需要的是 ObservableCollection 或其他 "made for WPF" Collection。一个 ObservableCollection<int>[] - 一组 ObservableCollection 实例 - 可能就是您正在寻找的机器人。但是 ObservableCollection<ObservableCollection<int>> 可能是更好的选择（您可能希望使用别名来保持这些类型的可读性）。

二维 int 数组自定义 dependencyProperty 绑定不起作用

Two dimension int array custom dependencyProperty binding not working

c#

wpf

xaml

dependency-properties