本項(xiàng)目結(jié)合EF 4.3及WCF實(shí)現(xiàn)了經(jīng)典三層架構(gòu)，各層面向接口，WCF實(shí)現(xiàn)SOA，Repository封裝調(diào)用，在此基礎(chǔ)上實(shí)現(xiàn)了WCFContext，動態(tài)服務(wù)調(diào)用及一個分頁的實(shí)例。
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1. 項(xiàng)目架構(gòu)圖：
2. 項(xiàng)目解決方案：
- 在傳統(tǒng)的三層架構(gòu)上增加了WcfService（服務(wù)端），WcfClientProxy（客戶端服務(wù)調(diào)用），及WcfExtension（一些擴(kuò)展）
3. Wcf Service的實(shí)現(xiàn)：
- 工廠實(shí)現(xiàn)了RemoteServiceFactory（用于遠(yuǎn)程調(diào)用）和RefServiceFactory（本地引用調(diào)用服務(wù)層）生成客戶端代理，都需要實(shí)現(xiàn)IServiceFactory的“IService CreateService();”
- RemoteServiceFactory通過ChannelFactory動態(tài)產(chǎn)生客戶端代理類IService，并將此對象進(jìn)行緩存
- WCFExtension實(shí)現(xiàn)了WCFContext，可傳輸用戶登陸或IP上下文信息，以及攔截方法寫Log的機(jī)制，具體可以參考 http://www.cnblogs.com/lovecindywang/archive/2012/03/01/2376144.html
3. 數(shù)據(jù)層Repository的實(shí)現(xiàn)：
- 通過用來訪問領(lǐng)域?qū)ο蟮囊粋€類似集合的接口，在領(lǐng)域與數(shù)據(jù)映射層之間進(jìn)行協(xié)調(diào)，將領(lǐng)域模型從客戶代碼和數(shù)據(jù)映射層之間解耦出來，具體實(shí)現(xiàn)代碼：
- View Code
- public class DaoBase : IRepository, IDisposable
- {
- public DbContext context;
-
- public DaoBase()
- {
- this.context = new EasyEF.DAL.DbContext();
- }
-
- public T Update(T entity) where T : class
- {
- var set = context.Set();
- set.Attach(entity);
- context.Entry(entity).State = EntityState.Modified;
- context.SaveChanges();
-
- return entity;
- }
-
- public T Insert(T entity) where T : class
- {
- context.Set().Add(entity);
- context.SaveChanges();
- return entity;
- }
-
- public void Delete(T entity) where T : class
- {
- context.Entry(entity).State = EntityState.Deleted;
- context.SaveChanges();
- }
-
- public T Find(params object[] keyValues) where T : class
- {
- return context.Set().Find(keyValues);
- }
-
- public List FindAll(Expression> conditions = null) where T : class
- {
- if (conditions == null)
- return context.Set().ToList();
- else
- return context.Set().Where(conditions).ToList();
- }
-
- public PagedList FindAllByPage(Expression> conditions, Expression> orderBy, int pageSize, int pageIndex) where T : class
- {
- var queryList = conditions == null ? context.Set() : context.Set().Where(conditions) as IQueryable;
-
- return queryList.OrderByDescending(orderBy).ToPagedList(pageIndex, pageSize);
- }
-
- public void Dispose()
- {
- this.context.Dispose();
- }
4. 數(shù)據(jù)層基于Entity Framwork code First：
DBContext
- View Code
- public class DbContext : System.Data.Entity.DbContext
- {
- public DbContext()
- : base("MyDbContext")
- {
- this.Configuration.ProxyCreationEnabled = false;
- }
-
- public DbSet Categories { get; set; }
- public DbSet Products { get; set; }
- }
Model Mapping
- View Code
- [Table("Product")]
- public partial class Product
- {
- public int Id { get; set; }
-
- [StringLength(50)]
- [Required(ErrorMessage = "名稱不能為空")]
- public string Name { get; set; }
-
- public int Size { get; set; }
-
- [StringLength(300)]
- public string PhotoUrl { get; set; }
-
- public DateTime AddTime { get; set; }
-
- public int CategoryId { get; set; }
- public virtual Category Category { get; set; }
- }
5. 提供了MVC調(diào)用服務(wù)端分頁的實(shí)例：
- MVC調(diào)用Wcf客戶代理請求分頁數(shù)據(jù)集合
- public ActionResult Index(int pageIndex = 1)
- {
- var products = this.Service.GetProducts(PageSize, pageIndex);
- return View(products);
- }
- protected override void OnActionExecuting(ActionExecutingContext filterContext)
- {
- base.OnActionExecuting(filterContext);
- WCFContext.Current.Operater = new Operater(){Name = "guozili",Time = DateTime.Now,IP = Fetch.UserIp,};
- }
- BLL取出Context信息并調(diào)用數(shù)據(jù)層
- public PagedList GetProducts(int pageSize, int pageIndex, int categoryId = 0)
- {
- //Test WCFContext
- var context = WCFContext.Current.Operater;
- return this.dao.FindAllByPage(p => categoryId == 0 ? true : p.CategoryId == categoryId, p => p.Id, pageSize, pageIndex);
- }
- DAL調(diào)用通用的Repository接口
- public PagedList FindAllByPage(Expression> conditions, Expression> orderBy, int pageSize, int pageIndex) where T : class
- {
- var queryList = conditions == null ? context.Set() : context.Set().Where(conditions) as IQueryable;
-
- return queryList.OrderByDescending(orderBy).ToPagedList(pageIndex, pageSize);
- }
6. 最后提供源碼下
http://files.cnblogs.com/guozili/EasyEF.rar
原文鏈接：http://www.cnblogs.com/guozili/archive/2012/09/03/2667429.html
網(wǎng)站名稱：分享基于EF+WCF的通用三層架構(gòu)及解析
文章鏈接：
http://uogjgqi.cn/article/dhsdpde.html
