C#反射(Reflection)對類的屬性get或set值
阿新 • • 發佈:2019-01-30
近段時間,有朋友叫Insus.NET瞭解一下反射(Reflection)方面的知識,反射提供了封裝程式集、模組和型別的物件(Type型別)。可以使用反射動態建立型別的例項,將型別繫結到現有物件,或從現有物件獲取型別並呼叫其方法或訪問其欄位和屬性。如果程式碼中使用了屬性,可以利用反射對它們進行訪問。
下面的例子,是Insus.NET是練習對一個類別的屬性進行set和get值。
首先寫一個類,再寫一個可讀寫的屬性:
View Codeusing System; using System.Collections.Generic; using System.Linq; usingSystem.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一向是寫asp.net程式,練習也是在站點進行。
建立一個網頁,引用兩個namespace:
View Codeusing Insus.NET; using System.Reflection;
讀寫屬性:
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) { //例項化類 Member objMember = new Member(); //對屬性set值 PropertyInfo pi = objMember.GetType().GetProperty("Name", BindingFlags.Public | BindingFlags.Instance); if (null != pi && pi.CanWrite) { pi.SetValue(objMember, "Insus.NET", null); } //對屬性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()); } } }