介面編程,反射建立對象

 

using System;
using System.Collections.Generic;
using System.Text;

namespace ABC.Factory
{
    public class BLLFactory
    {
        /// <summary>
        /// 建立執行個體
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="TypeName"></param>
        /// <returns></returns>
        public static T CreateInstant<T>(string TypeName)
        {
            T ret = default(T);
            try
            {
                string dd = typeof(string).ToString();
                string FullTypeName = "ABC.BLL." + TypeName;
                Type type = Type.GetType(FullTypeName);
                object obj = Activator.CreateInstance(type);
                ret = (T)obj;
                return ret;
            }
            catch
            {
                return ret;
            }
        }

        /// <summary>
        /// 建立執行個體
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="TypeName"></param>
        /// <param name="Args">建構函式的參數</param>
        /// <returns></returns>
        public static T CreateInstant<T>(string TypeName,object[] Args)
        {
            T ret = default(T);
            try
            {
                string dd = typeof(string).ToString();
                string FullTypeName = "ABC.BLL." + TypeName;
                Type type = Type.GetType(FullTypeName);
                object obj = Activator.CreateInstance(type, Args);
                ret = (T)obj;
                return ret;
            }
            catch
            {
                return ret;
            }
        }
    }
}

         //介面編程,反射建立對象
         // 類庫IBLL裡定義有介面ICXbll ，
        // 類庫 BLL裡定義有類CXbll 。類FPCXbll實現 介面ICXbll
        // 為使得能夠在只引用介面庫IBLL而不引用類庫 BLL的條件下建立類 BLL.CXbll

         IBLL.ICXbll cxBLL = Factory.BLLFactory.CreateInstant<IBLL.ICXbll>("CXbll");

        BLL.CXbll cxBLL = new ABC.BLL.CXbll();