在WPF中將自定義類添加到XAML

Question

因此，我創建了此類Sprite.cs：

class Sprite : INotifyPropertyChanged
{
    double _Speed;        
    RectangleGeometry _SpriteRectangleGeometry;
    Path _SpritePath;
    public Sprite()
    {
        _SpriteRectangleGeometry = new RectangleGeometry();
        _SpriteRectangleGeometry.Rect = new Rect(0, 0, 50, 50);
        Speed = 50;
        _SpritePath = new Path();
        Color = Brushes.Black;
        _SpritePath.Data = _SpriteRectangleGeometry;
    }
    public Sprite(double xpos, double ypos, double height, double width, double speed, SolidColorBrush color)
    {
        _SpriteRectangleGeometry = new RectangleGeometry();
        _SpriteRectangleGeometry.Rect = new Rect(xpos, ypos, width, height);
        this.Speed = speed;
        _SpritePath = new Path();
        this.Color = color;
        _SpritePath.Data = _SpriteRectangleGeometry;
    }
    public double XPos
    {
        get { return _SpriteRectangleGeometry.Rect.X; }
        set
        {
            _SpriteRectangleGeometry.Rect = new Rect(value, YPos, Width, Height);
            //Notify the binding that the value has changed.
            this.OnPropertyChanged("XPos");
        }
    }
    public double YPos
    {
        get { return _SpriteRectangleGeometry.Rect.Y; }
        set
        {
            _SpriteRectangleGeometry.Rect = new Rect(XPos, value, Width, Height);
            //Notify the binding that the value has changed.
            this.OnPropertyChanged("YPos");
        }
    }
    public double Speed
    {
        get { return _Speed; }
        set { _Speed = value; }
    }
    public double Width
    {
        get { return _SpriteRectangleGeometry.Rect.Width; }
        set { _SpriteRectangleGeometry.Rect = new Rect(XPos, YPos, value, Height); }
    }
    public double Height
    {
        get { return _SpriteRectangleGeometry.Rect.Height; }
        set { _SpriteRectangleGeometry.Rect = new Rect(XPos, YPos, Width, value); }
    }
    public SolidColorBrush Color
    {
        get { return (SolidColorBrush)_SpritePath.Fill; }
        set { _SpritePath.Fill = value; }
    }
    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string strPropertyName)
    {
        if (PropertyChanged != null)
            PropertyChanged(this, new PropertyChangedEventArgs(strPropertyName));
    }
}

我現在想做的是將Sprite實例添加到Xaml，但是當我這樣做時，出現此錯誤：

無法將“ Sprite”類型的值添加到UIElementCollection類型的集合或字典中

有什么建議嗎？

Answer 1

Sprite應該從UIElement類派生，並添加到UIElementCollection 。 你也可以用ContentControl包裝它，並提供一個DataTemplate ，它將為你的精靈對象創建一些UIElement 。

Answer 2

您必須將其添加到資源部分，而不僅僅是內聯（並確保它具有密鑰）

<src:Sprite x:Key="data"/>

您還需要在文件頂部聲明名稱空間