c#-PropertyGrid处理未知类型/自定义属性

我刚刚尝试将PropertyGrid用于我的“游戏编辑器”,以便编辑Objects以及此类对象,但是您如何处理未知类型呢？

例如,我使用XNA,Texture2D是XNA Framework的一种类型(其他方法工作得很好,例如Point / Vector),但是Texture2D只是其核心的位图,因此有一种方法可以“处理”未知类型并自定义样式. PropertyGrid可以显示它们吗？

解决方法:

您可以使用TypeConverters

有一些从TypeConverter继承并提供基本行为的通用类型转换器,其中最有用的是ExpandableObjectConverter,可用于扩展类实例.

    [TypeConverter( typeof( ExpandableObjectConverter ) )]
    public PhysicsObject Physics { get; private set; }

这是我的Point3结构及其自定义类型转换器的示例：

namespace Microsoft.Xna.Framework
{
#if WINDOWS
    public class Point3Converter: System.ComponentModel.ExpandableObjectConverter
    {
        public override bool CanConvertFrom( System.ComponentModel.ITypeDescriptorContext context, Type sourceType )
        {
            return sourceType == typeof( string );
        }

        public override object ConvertFrom( System.ComponentModel.ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value )
        {
            try
            {
                string[] tokens = (( string ) value).Split( ';' );
                return new Point3( int.Parse( tokens[0] ), int.Parse( tokens[1] ), int.Parse( tokens[2] ) );
            }
            catch
            {
                return context.PropertyDescriptor.GetValue( context.Instance );
            }
        }

        public override object ConvertTo( System.ComponentModel.ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, Type destinationType )
        {
            Point3 p = ( Point3 ) value;
            return p.X +";"+ p.Y+";" + p.Z;
        }
    }

    [System.ComponentModel.TypeConverter( typeof( Point3Converter ) )]
#endif
    public struct Point3
    {
        public int X,Y,Z;

        public static readonly Point3 UnitX = new Point3( 1, 0, 0 );
        public static readonly Point3 UnitY = new Point3( 0, 1, 0 );
        public static readonly Point3 UnitZ = new Point3( 0, 0, 1 );

        public Point3( int X, int Y, int Z )
        {
            this.X = X;
            this.Y = Y;
            this.Z = Z;
        }

        public static Vector3 operator +( Point3 A, Vector3 B )
        {
            return new Vector3( A.X + B.X, A.Y + B.Y, A.Z + B.Z );
        }

        public static Point3 operator +( Point3 A, Point3 B )
        {
            return new Point3( A.X + B.X, A.Y + B.Y, A.Z + B.Z );
        }

        public static Point3 operator -( Point3 A, Point3 B )
        {
            return new Point3( A.X - B.X, A.Y - B.Y, A.Z - B.Z );
        }

        public static Point3 operator -( Point3 A )
        {
            return new Point3( -A.X, -A.Y, -A.Z );
        }


        public override string ToString( )
        {
            return X+";"+Y+";"+Z;
        }
    }  
}

标签：properties,xna,propertygrid,c
来源： https://codeday.me/bug/20191031/1977709.html