[C#]通过反射访问类私有成员

参考链接：

https://www.cnblogs.com/adodo1/p/4328198.html

代码如下：

using System;
using System.Reflection;
using UnityEngine;

public static class ObjectExtension
{
    //获取私有字段的值
    public static T GetPrivateField<T>(this object instance, string fieldName)
    {
        BindingFlags flags = BindingFlags.Instance | BindingFlags.NonPublic;
        Type type = instance.GetType();
        FieldInfo info = type.GetField(fieldName, flags);
        return (T)info.GetValue(instance);
    }

    //设置私有字段的值
    public static void SetPrivateField(this object instance, string fieldName, object value)
    {
        BindingFlags flags = BindingFlags.Instance | BindingFlags.NonPublic;
        Type type = instance.GetType();
        FieldInfo info = type.GetField(fieldName, flags);
        info.SetValue(instance, value);
    }

    //获取私有属性的值
    public static T GetPrivateProperty<T>(this object instance, string propertyName)
    {
        BindingFlags flags = BindingFlags.Instance | BindingFlags.NonPublic;
        Type type = instance.GetType();
        PropertyInfo info = type.GetProperty(propertyName, flags);
        return (T)info.GetValue(instance, null);
    }

    //设置私有属性的值
    public static void SetPrivateProperty<T>(this object instance, string propertyName, object value)
    {
        BindingFlags flags = BindingFlags.Instance | BindingFlags.NonPublic;
        Type type = instance.GetType();
        PropertyInfo info = type.GetProperty(propertyName, flags);
        info.SetValue(instance, value, null);
    }

    //调用私有方法
    public static object CallPrivateMethod(this object instance, string methodName, params object[] param)
    {
        BindingFlags flags = BindingFlags.Instance | BindingFlags.NonPublic;
        Type type = instance.GetType();
        MethodInfo info = type.GetMethod(methodName, flags);
        return info.Invoke(instance, param);
    }
}

public class TestReflectionClass {
    private int field;
    private string Property { get; set; }

    public TestReflectionClass()
    {
        field = 1;
        Property = "a";
    }

    private void SetValue(int field, string property)
    {
        this.field = field;
        this.Property = property;
    }
}

public class TestReflection : MonoBehaviour {

    void Start ()
    {
        TestReflectionClass testClass = new TestReflectionClass();

        print(testClass.GetPrivateField<int>("field"));//1
        print(testClass.GetPrivateProperty<string>("Property"));//a

        testClass.CallPrivateMethod("SetValue", 2, "b");

        testClass.SetPrivateProperty<string>("Property", "c");
        print(testClass.GetPrivateField<int>("field"));//2
        print(testClass.GetPrivateProperty<string>("Property"));//c
    }
}