近段时间,有朋友叫Insus.NET了解一下反射(Reflection)方面的知识,反射提供了封装程序集、模块和类型的对象(Type类型)。可以使用反射动态创建类型的实例,将类型绑定到现有对象,或从现有对象获取类型并调用其方法或访问其字段和属性。如果代码中使用了属性,可以利用反射对它们进行访问。
下面的例子,是Insus.NET是练习对一个类别的属性进行set和get值。
首先写一个类,再写一个可读写的属性:
using System;using System.Collections.Generic;using System.Linq;using System.Web;/// <summary>/// Summary description for Member/// </summary>namespace Insus.NET{ public class Member { private string _Name; public string Name { get { return _Name; } set { _Name = value; } } public Member() { // // TODO: Add constructor logic here // } }}
Insus.NET一向是写asp.net程序,练习也是在站点进行。
创建一个网页,引用两个namespace:
using Insus.NET;using System.Reflection;
读写属性:
using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using Insus.NET;using System.Reflection;public partial class _Default : System.Web.UI.Page{ protected void Page_Load(object sender, EventArgs e) { //实例化类 Member objMember = new Member(); //对属性set值 PropertyInfo pi = objMember.GetType().GetProperty("Name", BindingFlags.Public | BindingFlags.Instance); if (null != pi && pi.CanWrite) { pi.SetValue(objMember, "Insus.NET", null); } //对属性get值 PropertyInfo pii = objMember.GetType().GetProperty("Name", BindingFlags.Public | BindingFlags.Instance); if (null != pii && pi.CanRead) { object obj_Name = pii.GetValue(objMember, null); Response.Write(obj_Name.ToString()); } }}