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之前改写网上收集的Respoistory 模式感觉很多地方都是不可取的,这里经过这段时间的充电重新改写一版,当然注释已加,还有不懂的,可以留言我。
首先还是拿出IRespoistory的接口层代码 using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Linq.Expressions; namespace Respository { /// <summary> /// 这里T是泛型,(T:class T是泛型参数。where T : class 是对T的限制,这里的意思是T必须是引用类型,包括任何类、接口、委托或数组类型) /// </summary> /// <typeparam name="T"></typeparam> public interface IRespository<T>where T:class { /// <summary> /// IRespository保存接口 /// </summary> /// <param name="entity"></param> /// <returns></returns> bool SaveEntity(T entity); /// <summary> /// IRespository修改接口 /// </summary> /// <param name="entity"></param> /// <returns></returns> bool UpdateEntity(T entity); /// <summary> /// IRespository删除 /// </summary> /// <param name="entity"></param> /// <returns></returns> bool DeleteEntity(T entity); /// <summary> /// 根据id查询 /// </summary> /// <param name="Id"></param> /// <returns></returns> T GetEntityById(object Id); /// <summary> /// 带条件查询 /// </summary> /// <param name="where"></param> /// <returns></returns> T Get(Expression<Func<T, bool>> where); /// <summary> /// 查询所有 /// </summary> /// <returns></returns> IEnumerable<T> GetALLEntity(); /// <summary> /// 这里也可以用IEnumerable类型,带条件查询所有 /// </summary> /// <param name="where"></param> /// <returns></returns> IQueryable<T> GetAllEntityWhere(Expression<Func<T, bool>> where); /// <summary> /// 分页 /// </summary> /// <param name="pageIndex"></param> /// <param name="PageSize"></param> /// <returns></returns> IList<T> GetPageEntities(int pageIndex, int PageSize); /// <summary> /// 分页带查询条件 /// </summary> /// <param name="pageIndex"></param> /// <param name="PageSize"></param> /// <param name="where"></param> /// <returns></returns> IList<T> GetPageEntities(int pageIndex, int PageSize, Expression<Func<T, bool>> where); } } 然后是Respoistory 对应接口的实现 using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Data; using System.Data.Entity; using System.Linq.Expressions; namespace Respository { public class Respository<T>:IRespository<T>where T:class { //这里首先把DbContext (数据库的上下文给带出来) public DbContext context; public Respository(DbContext context) { this.context = context; } /// <summary> /// Res保存的方法 /// </summary> /// <param name="entity"></param> /// <returns></returns> public bool SaveEntity(T entity) { bool RetStatus = false; context.Set<T>().Add(entity); if (Save() > 0) { RetStatus = true; } return RetStatus; } /// <summary> /// Res修改的方法 /// </summary> /// <param name="entity"></param> /// <returns></returns> public bool UpdateEntity(T entity) { // throw new NotImplementedException(); bool RetStatus = false; if (context.Entry(entity).State == System.Data.Entity.EntityState.Modified) { if (Save()> 0) { RetStatus = true; } } return RetStatus; } /// <summary> /// Res删除的方法 /// </summary> /// <param name="entity"></param> /// <returns></returns> public bool DeleteEntity(T entity) { //throw new NotImplementedException(); bool RetStatus=false; if (context.Entry(entity).State == System.Data.Entity.EntityState.Deleted) { context.Set<T>().Remove(entity); if (Save() > 0) { RetStatus = true; } } return RetStatus; } /// <summary> /// 对Set<T>根据id 的查询的操作 /// </summary> /// <param name="Id"></param> /// <returns></returns> public T GetEntityById(object Id) { return context.Set<T>().Find(Id); } /// <summary> /// 这里对Set<T>是带条件的操作 /// </summary> /// <param name="where"></param> /// <returns></returns> public T Get(Expression<Func<T, bool>> where) { return context.Set<T>().Where(where).FirstOrDefault<T>(); } /// <summary> /// 查询所有的 /// </summary> /// <returns></returns> public IEnumerable<T> GetALLEntity() { // throw new NotImplementedException(); IEnumerable<T> query = context.Set<T>(); return query; } /// <summary> /// 查询所有带条件 /// </summary> /// <param name="where"></param> /// <returns></returns> public IQueryable<T> GetAllEntityWhere(Expression<Func<T, bool>> where) { IQueryable<T> query = context.Set<T>().Where(where); return query; } /// <summary> /// 分页方法 /// </summary> /// <param name="pageIndex"></param> /// <param name="PageSize"></param> /// <returns></returns> public IList<T> GetPageEntities(int pageIndex, int PageSize) { IList<T> List = context.Set<T>().Skip(pageIndex * PageSize).Take(PageSize).ToList(); return List ; } /// <summary> /// 分页带查询条件 /// </summary> /// <param name="pageIndex"></param> /// <param name="PageSize"></param> /// <param name="where"></param> /// <returns></returns> public IList<T> GetPageEntities(int pageIndex, int PageSize, Expression<Func<T, bool>> where) { // throw new NotImplementedException(); IList<T> List = context.Set<T>().Where(where).Skip(pageIndex * PageSize).Take(PageSize).ToList(); return List; } /// <summary> /// Save 保存确认方法 /// </summary> public int Save() { return context.SaveChanges(); } } } 这里我也把实际的调用写出来吧,希望对看到的同学有所帮助 我这里是用edmx 生成的一个简单的用户表的model 实列和Dbcontext //------------------------------------------------------------------------------ // <auto-generated> // 此代码是根据模板生成的。 // // 手动更改此文件可能会导致应用程序中发生异常行为。 // 如果重新生成代码,则将覆盖对此文件的手动更改。 // </auto-generated> //------------------------------------------------------------------------------ namespace SSOModel.Models { using System; using System.Data.Entity; using System.Data.Entity.Infrastructure; public partial class yiliuyangEntities : DbContext { public yiliuyangEntities() : base("name=Entities") { } protected override void OnModelCreating(DbModelBuilder modelBuilder) { throw new UnintentionalCodeFirstException(); } public DbSet<yi_userinfo> yi_userinfo { get; set; } } } //------------------------------------------------------------------------------ // <auto-generated> // 此代码是根据模板生成的。 // // 手动更改此文件可能会导致应用程序中发生异常行为。 // 如果重新生成代码,则将覆盖对此文件的手动更改。 // </auto-generated> //------------------------------------------------------------------------------ namespace SSOModel.Models { using System; using System.Collections.Generic; public partial class userinfo { public int userid { get; set; } public string username { get; set; } public string userpwd { get; set; } public string yusercode { get; set; } public Nullable<int> usersex { get; set; } public string userqq { get; set; } public string usertel { get; set; } } } 然后是EF_Userinfo 方法调用层 using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Linq.Expressions; using Respository; using SSOModel.Models; namespace SSOMain.Models { public class EF_Userinfo { Respository<yi_userinfo> EF_Res = new Respository<userinfo>(new Entities()); //这里我只写了一个简单的读取方法,是get userinfo 的所有信息 public IList<yi_userinfo> GetUserInfo() { return EF_Res.GetALLEntity().ToList(); } } } 最后是HomeController using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Mvc; using SSOModel; using Respository; using SSOMain.Models; namespace SSOMain.Controllers { public class HomeController : Controller { // // GET: /Home/ EF_Userinfo Ef = new EF_Userinfo(); public ActionResult Index() { var list = Ef.GetUserInfo(); return View(list.ToList()); } } } 页面我也贴出来的 index.cshtml @model IEnumerable<SSOModel.Models.userinfo> @{ ViewBag.Title = "Index"; } <h2>Index</h2> <table> <tr> <th> 名字 </th> <th> 密码 </th> </tr> @foreach (var item in Model) { <tr> <td> @item.username </td> <td> @item.userpwd </td> </tr> } </table>
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