C#反射——简单反射操作类的封装

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Reflection;

namespace ReligionServer.util{

    /// <summary>
    /// 反射工具类
    /// </summary>
    public class ReflectionUtil{
        
        public static void MyInvoke(HttpContext context, Type type, String methodName) {
            try {
                //BindingFlags bindingFlags = BindingFlags.Public | BindingFlags.Instance;
                BindingFlags bindingFlags = BindingFlags.Public | BindingFlags.Instance | BindingFlags.NonPublic;
                MethodInfo method = type.GetMethod(methodName, bindingFlags);//反射获取公有和私有方法  默认获取公有方法

                method.Invoke(Activator.CreateInstance(type, true), bindingFlags, Type.DefaultBinder, new object[] { context }, null);
            } catch (FormatException e) {
                handler.BaseHandler.Error<String>(context, new List<string>() { e.Message });
            } catch (TargetInvocationException e) {
                //handler.BaseHandler.Error<String>(context, new List<string>() { e.Message });
            } catch (Exception e) {
                //handler.BaseHandler.Error<String>(context, new List<string>() { e.Message });
            }
        }


        /// <summary>
        /// 如果传递的type具有泛型形参, 那么返回泛型形参对象的实例, 否则返回当前type的实例
        /// </summary>
        /// <param name="type"></param>
        /// <returns></returns>
        public static Object Instance(Type type) {
            Type paramType = type.GetGenericArguments()[0];
            type = paramType == null ? type : paramType;
            return Activator.CreateInstance(type, true);
        }

        /// <summary>
        /// 获取所有方法(公有方法和私有方法)
        /// </summary>
        /// <param name="type"></param>
        /// <returns></returns>
        public static MethodInfo[] GetMethods(Type type) {
            BindingFlags bindingFlags = BindingFlags.Public | BindingFlags.Instance | BindingFlags.NonPublic;
            return type.GetMethods(bindingFlags);
        }


        /// <summary>
        /// 获取包括父类(但是除开Object)的所有字段
        /// </summary>
        /// <param name="type"></param>
        /// <returns></returns>
        public static List<FieldInfo> GetFileldS(Type type) {
            List<FieldInfo> list = new List<FieldInfo>();
            list.AddRange(type.GetFields(BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static));
            while ((type = type.BaseType) != typeof(Object)) {
                list.AddRange(type.GetFields(BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static));
            }
            return list;
        }


    }
}
//调用反射执行方法
protected void InitAction(HttpContext context) {
    String action = context.Request.Params["action"];
    if (action != null && action != "") {
        ReflectionUtil.MyInvoke(context, this.GetType(), action);
    } else {
        context.Response.ContentType = "text/plain";
        context.Response.Write("Action 参数不能为空...");
    }
}

 //这个是我在使用ashx处理程序的时候写的,一个ashx(一般处理程序)对应一个请求,我觉得一个请求一个文件不够优雅,所以就使用反射结合上传参数action(action:methodname)进行方法调用,以此来实现一个文件一个模块可多个请求的情况

Framework版本:.Net Framework 4

posted @ 2019-03-15 11:14  拂衣志  阅读(846)  评论(0编辑  收藏  举报