C# 匿名对象、动态属性

以下代码基于 Unity, 放置在 Editor文件夹下

#if UNITY_EDITOR

using UnityEditor;
using UnityEngine;

public class EditorTest : Editor {

    [MenuItem("Tools/EditorTest", true)]
    private static bool ValidateMenuItem() {
        return !EditorApplication.isPlaying;
    }

    [MenuItem("Tools/EditorTest")]
    private static void Test() {
        if (EditorApplication.isPlaying) return;
        Debug.Log("== Tools/EditorTest ==");

        // 匿名对象
        var obj = new { a = 1, b = 2 };
        GetProps(obj);

        // 动态属性，使用 System.Dynamic.ExpandoObject 类实现
        dynamic dyObj = new System.Dynamic.ExpandoObject();
        dyObj.a = 3;
        dyObj.b = 4;
        GetDyProps(dyObj);

    }

    private static T CastAnonymous<T>(object anonymous, T anonymousType) {
        return (T)anonymous;
    }

    private static void GetProps(object arg) {
        // 利用泛型特性访问属性
        var obj = CastAnonymous(arg, new { a = 0, b = 0 });
        Debug.Log($"obj.a:{obj.a}, obj.b:{obj.b}"); // output: obj.a:1, obj.b:2

        // 利用反射机制访问属性
        var argType = arg.GetType();
        var a = argType.GetProperty("a").GetValue(arg);
        var b = argType.GetProperty("b").GetValue(arg);
        Debug.Log($"a:{obj.a}, b:{obj.b}"); // output: a:1, b:2
    }

    private static void GetDyProps(dynamic dyObj) {
        Debug.Log($"dyObj.a:{dyObj.a}, dyObj.b:{dyObj.b}"); // output: dyObj.a:3, dyObj.b:4
    }

}
#endif