C# 通過反射執行個體化BLL商務邏輯層

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BLLFactory的對象統一調用規則

在我的架構裡面，所有的業務類調用都是以BLLFactory入口進行開始建立，傳遞業務對象進去即可建立，這種統一入口的方式能夠方便記憶，並減少代碼，更重要的是能夠很好把一些如緩衝規則、建立規則封裝起來，簡化代碼。BLLFactory的建立如下所示。

方法一：

using Globalegrow.Toolkit;using System;using System.Collections;using System.Collections.Generic;using System.Linq;using System.Reflection;using System.Text;namespace Globalegrow.BLL{    /// <summary>    /// 對業務類進行構造的工廠類    /// </summary>    /// <typeparam name="T">業務物件類型</typeparam>    public class BLLFactory<T> where T : class    {        private static Hashtable objCache = new Hashtable();        private static object syncRoot = new Object();        /// <summary>        /// 建立或者從緩衝中擷取對應業務類的執行個體        /// </summary>        public static T Instance        {            get            {                string CacheKey = typeof(T).FullName;                T bll = (T)objCache[CacheKey];　                if (bll == null)                {                    lock (syncRoot)                    {                        if (bll == null)                        {                            Assembly assObj = Assembly.Load(typeof(T).Assembly.GetName().Name);                            object obj = assObj.CreateInstance(CacheKey);                            bll = obj as T;                             objCache.Add(typeof(T).FullName, bll);                        }                    }                }                return bll;            }        }    }}

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方法二：

using Globalegrow.Toolkit;using System;using System.Collections;using System.Collections.Generic;using System.Linq;using System.Reflection;using System.Text;namespace Globalegrow.BLL{    /// <summary>    /// 對業務類進行構造的工廠類    /// </summary>    /// <typeparam name="T">業務物件類型</typeparam>    public class BLLFactory<T> where T : class    {        private static object syncRoot = new Object();        /// <summary>        ///         /// </summary>        public static T Instance        {            get            {                string CacheKey = typeof(T).FullName;                lock (syncRoot)                {                    T bll = Reflect<T>.Create(typeof(T).FullName, typeof(T).Assembly.GetName().Name);                    return bll;                }            }        }    }}

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反射需要用到的擴充方法

using System.Collections;using System.Reflection;namespace Globalegrow.Toolkit{    public class Reflect<T> where T : class    {        private static Hashtable m_objCache = null;        public static Hashtable ObjCache        {            get            {                if (m_objCache == null)                {                    m_objCache = new Hashtable();                }                return m_objCache;            }        }        public static T Create(string sName, string sFilePath)        {            return Create(sName, sFilePath, true);        }        public static T Create(string sName, string sFilePath, bool bCache)        {            string CacheKey = sFilePath + "." + sName;            T objType = null;            if (bCache)            {                objType = (T)ObjCache[CacheKey];    //從緩衝讀取                if (!ObjCache.ContainsKey(CacheKey))                {                    Assembly assObj = CreateAssembly(sFilePath);                    object obj = assObj.CreateInstance(typeof(T).FullName);                    objType = (T)obj;                    ObjCache.Add(CacheKey, objType);// 寫入緩衝 將DAL內某個對象裝入緩衝                }            }            else            {                objType = (T)CreateAssembly(sFilePath).CreateInstance(CacheKey); //反射建立            }            return objType;        }        public static Assembly CreateAssembly(string sFilePath)        {            Assembly assObj = (Assembly)ObjCache[sFilePath];            if (assObj == null)            {                assObj = Assembly.Load(sFilePath);                if (!ObjCache.ContainsKey(sFilePath))                {                    ObjCache.Add(sFilePath, assObj);//將整個ITDB。DAL。DLL裝入緩衝                }            }            return assObj;        }    }}

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調用:

var systemConfigBLL = BLLFactory<SystemConfigBLL>.Instance.GetDBServiceTime();

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C# 通過反射執行個體化BLL商務邏輯層