访问私有成员的方法-------C# 转载

  static void Main(string[] args)
        {
            MyClass mc = new MyClass();
            Type t = mc.GetType();
            Console.WriteLine("字段:");
            foreach (FieldInfo fi in t.GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic))
                Console.WriteLine("名称:" + fi.Name + ",类型:" + fi.FieldType.Name);


            Console.WriteLine("属性:");
            foreach (PropertyInfo pi in t.GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic))
            {                                                                                   //获取值
                Console.WriteLine("名称:" + pi.Name + ",类型:" + pi.PropertyType.Name + ",值:" + pi.GetValue(mc, null));
                                                                                pi.SetValue(mc, "nihao", null);   //赋值                  
                                             
            }
               
            Console.WriteLine("方法:");
            foreach (MethodInfo mi in t.GetMethods(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic))
                Console.WriteLine("名称:" + mi.Name + ",返回类型:" + mi.ReturnType.Name);

            Console.ReadKey();
        }
        class MyClass
        {
            private int i;
            public int I;


            private string s;
            public string S
            {
                get { return s; }
                set { s = value; }
            }


            public void Method()
            { }
        }

  1、得到私有字段的值：
 
public static T GetPrivateField<T>(this object instance, string fieldname)
{
    BindingFlags flag = BindingFlags.Instance | BindingFlags.NonPublic;
    Type type = instance.GetType();
    FieldInfo field = type.GetField(fieldname, flag);
    return (T)field.GetValue(instance);
}2、得到私有属性的值：
 
public static T GetPrivateProperty<T>(this object instance, string propertyname)
{
    BindingFlags flag = BindingFlags.Instance | BindingFlags.NonPublic;
    Type type = instance.GetType();
    PropertyInfo field = type.GetProperty(propertyname, flag);
    return (T)field.GetValue(instance, null);
}3、设置私有成员的值：
 
public static void SetPrivateField(this object instance, string fieldname, object value) 
{ 
    BindingFlags flag = BindingFlags.Instance | BindingFlags.NonPublic; 
    Type type = instance.GetType(); 
    FieldInfo field = type.GetField(fieldname, flag); 
    field.SetValue(instance, value); 
} 
4、设置私有属性的值： 
public static void SetPrivateProperty(this object instance, string propertyname, object value) 
{ 
    BindingFlags flag = BindingFlags.Instance | BindingFlags.NonPublic; 
    Type type = instance.GetType(); 
    PropertyInfo field = type.GetProperty(propertyname, flag); 
    field.SetValue(instance, value, null); 
} 
5、调用私有方法：
 
public static T CallPrivateMethod<T>(this object instance, string name, params object[] param)
{
    BindingFlags flag = BindingFlags.Instance | BindingFlags.NonPublic;
    Type type = instance.GetType();
    MethodInfo method = type.GetMethod(name, flag);
    return (T)method.Invoke(instance, param);
}