反射.我们可以使用它实现什么? [英] Reflection. What can we achieve using it?

问题描述

我正在阅读和学习 C# 中的反射.知道它如何在我的日常工作中帮助我就好了，所以我希望比我更有经验的人告诉我使用它可以实现哪些类型的事情的示例或想法，或者我们如何减少代码量我们写的.

I'm reading and learning about reflection in C#. It would be fine to know how can it help me in my daily work, so I want people with more experience than me tell me samples or ideas about what kinds of things can we achieve using it, or how can we reduce de amount of code that we write.

谢谢.

推荐答案

我最近使用它为枚举中的字段添加自定义属性:

I recently used it to add custom attributes to fields in my enum:

public enum ShapeName
{
    // Lines
    [ShapeDescription(ShapeType.Line, "Horizontal Scroll Distance", "The horizontal distance to scroll the browser in order to center the game.")]
    HorizontalScrollBar,
    [ShapeDescription(ShapeType.Line, "Vertical Scroll Distance", "The vertical distance to scroll the browser in order to center the game.")]
    VerticalScrollBar,
}

使用反射获取字段:

    public static ShapeDescriptionAttribute GetShapeDescription(this ShapeName shapeName)
    {
        Type type = shapeName.GetType();
        FieldInfo fieldInfo = type.GetField(shapeName.ToString());
        ShapeDescriptionAttribute[] attribs = fieldInfo.GetCustomAttributes(typeof(ShapeDescriptionAttribute), false) as ShapeDescriptionAttribute[];

        return (attribs != null && attribs.Length > 0) ? attribs[0] : new ShapeDescriptionAttribute(ShapeType.NotSet, shapeName.ToString());
    }

属性类:

[AttributeUsage(AttributeTargets.Field)]
public class ShapeDescriptionAttribute: Attribute
{
    #region Constructor
    public ShapeDescriptionAttribute(ShapeType shapeType, string name) : this(shapeType, name, name) { }

    public ShapeDescriptionAttribute(ShapeType shapeType, string name, string description)
    {
        Description = description;
        Name = name;
        Type = shapeType;
    }
    #endregion

    #region Public Properties
    public string Description { get; protected set; }

    public string Name { get; protected set; }

    public ShapeType Type { get; protected set; }
    #endregion
}

这篇关于反射.我们可以使用它实现什么?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！