v1.0.1

CC.Yi.DAL/BaseDal.cs

@@ -1,7 +1,9 @@
 using CC.Yi.IDAL;
 using CC.Yi.Model;
 using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.ChangeTracking;
 using System;
+using System.Collections.Generic;
 using System.Linq;
 using System.Linq.Expressions;
 
@@ -9,10 +11,9 @@ namespace CC.Yi.DAL
 {
     public class BaseDal<T> : IBaseDal<T> where T : class, new()
     {
-        public DataContext Db;
-        public BaseDal(DataContext _Db)
+        public DbContext Db
         {
-            Db = _Db;
+            get { return DbContentFactory.GetCurrentDbContent(); }
         }
         public IQueryable<T> GetEntities(Expression<Func<T, bool>> whereLambda)
         {
@@ -65,6 +66,11 @@ namespace CC.Yi.DAL
             //Db.SaveChanges();
             return entity;
         }
+        public bool AddRange(IEnumerable<T> entities)
+        {
+            Db.Set<T>().AddRange(entities);
+            return true;
+        }
 
         public bool Update(T entity)
         {
@@ -73,7 +79,16 @@ namespace CC.Yi.DAL
             //return Db.SaveChanges() > 0;
             return true;
         }
-
+        public bool Update(T entity, params string[] propertyNames)
+        {
+            EntityEntry entry = Db.Entry<T>(entity);
+            entry.State = EntityState.Unchanged;
+            foreach (var item in propertyNames)
+            {
+                entry.Property(item).IsModified = true;
+            }
+            return true;
+        }
 
         public bool Delete(T entity)
         {
@@ -87,6 +102,12 @@ namespace CC.Yi.DAL
             Db.Set<T>().Remove(entity);//由于这里先Find找到了实体，所以这里可以用Remove标记该实体要移除（删除）。如果不是先Find到实体就需要用System.Data.Entity.EntityState.Deleted
             return true;
         }
+        public bool DeteteRange(IEnumerable<T> entity)
+        {
+            Db.Set<T>().RemoveRange(entity);
+            return true;
+        }
+
 
     }
 }

CC.Yi.DAL/DbContentFactory.cs

@@ -8,43 +8,36 @@ namespace CC.Yi.DAL
 {
     public class DbContentFactory
     {
-        private static  DataContext Webcontext;
-
-        public  DbContentFactory(DataContext webContext)
+        private static DataContext Webcontext;
+        public static void Initialize(DataContext webContext)
         {
             Webcontext = webContext;
         }
-
-        //public static void Initialize(DataContext webContext)
-        //{
-        //    Webcontext = webContext;
-        //}
         public static DataContext GetCurrentDbContent()
         {
-            ////return new DataModelContainer();
-            ////一次请求共用一个上下文实例
-            ////每一次http请求都会开启一个新的线程，保证在一个线程中,DbContext是唯一的
-            ////CallContext：是线程内部唯一的数据槽（一块内存空间/容器）,相当于一个键值对数据容器，通过key获取value了,需要引入System.Runtime.Remoting.Messaging;命名空间
-            //DbContext db = CallContext.GetData("DbContext") as DbContext;
-            ////从 CallContext 中检索具有指定key“DbContext”的对象，并强转为DbContext
-            //if (db == null)//线程在数据槽里面没有此上下文
-            //{
-            //    db = Webcontext;
-            //    CallContext.SetData("DbContext", db);//放到数据槽中去,DbContext是key，db是value
-            //}
-            //return db;
-            return Webcontext;
+            //return new DataModelContainer();
+            //一次请求共用一个上下文实例
+            //每一次http请求都会开启一个新的线程，保证在一个线程中,DbContext是唯一的
+            //CallContext：是线程内部唯一的数据槽（一块内存空间/容器）,相当于一个键值对数据容器，通过key获取value了,需要引入System.Runtime.Remoting.Messaging;命名空间
+            DataContext db = CallContext.GetData("DbContext") as DataContext;
+            //从 CallContext 中检索具有指定key“DbContext”的对象，并强转为DbContext
+            if (db == null)//线程在数据槽里面没有此上下文
+            {
+                db = Webcontext;
+                CallContext.SetData("DbContext", db);//放到数据槽中去,DbContext是key，db是value
+            }
+            return db;
         }
 
-        //private static class CallContext
-        //{
-        //    static ConcurrentDictionary<string, AsyncLocal<object>> state = new ConcurrentDictionary<string, AsyncLocal<object>>();
+        private static class CallContext
+        {
+            static ConcurrentDictionary<string, AsyncLocal<object>> state = new ConcurrentDictionary<string, AsyncLocal<object>>();
 
-        //    public static void SetData(string name, object data) =>
-        //        state.GetOrAdd(name, _ => new AsyncLocal<object>()).Value = data;
+            public static void SetData(string name, object data) =>
+                state.GetOrAdd(name, _ => new AsyncLocal<object>()).Value = data;
 
-        //    public static object GetData(string name) =>
-        //        state.TryGetValue(name, out AsyncLocal<object> data) ? data.Value : null;
-        //}
+            public static object GetData(string name) =>
+                state.TryGetValue(name, out AsyncLocal<object> data) ? data.Value : null;
+        }
     }
 }

CC.Yi.DAL/T4DAL.cs

@@ -8,8 +8,5 @@ namespace CC.Yi.DAL
 {
     public partial class studentDal : BaseDal<student>, IstudentDal
     {
-        public studentDal(DataContext _Db) : base(_Db)
-        {
-        }
     }
 }

CC.Yi.DAL/T4DAL.tt

@@ -25,9 +25,6 @@ namespace CC.Yi.DAL
  #>
     public partial class <#=k #>Dal : BaseDal<<#=k #>>, I<#=k #>Dal
     {
-        public <#=k #>Dal(DataContext _Db) : base(_Db)
-        {
-        }
     }
 <#    } #>
 }