首次提交：添加src文件夹代码

Cowain.Bake.BLL/ServiceBase.cs

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+using Cowain.Bake.Model;
+using MySql.Data.MySqlClient;
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Data.Entity;
+using System.Linq;
+using System.Linq.Expressions;
+using Unity;
+
+namespace Cowain.Bake.BLL
+{
+    public class ServiceBase
+    {
+        public readonly object _lockObj = new object();
+
+        protected IUnityContainer _unityContainer;
+        public ServiceBase(IUnityContainer unityContainer)
+        {
+            //using (var context = new DbContext()) // 创建DbContext
+            //第二层：DbConnection（由ADO.NET连接池管理）;password=123456;Pooling=true;Max Pool Size=100;
+            //var data = context.Products.ToList(); // 触发连接获取
+            _unityContainer = unityContainer;
+        }
+
+        //public int  Commit()
+        //{
+        //    return this.Context.SaveChanges();        
+        //}
+
+        public int Delete<T>(int Id) where T : class
+        {
+            using (var Context = new BakingEntities())
+            {
+                T t = Context.Set<T>().Find(Id);//也可以附加
+                if (t == null) throw new Exception("t is null");
+                Context.Set<T>().Remove(t);
+                return Context.SaveChanges();
+            }
+        }
+
+        public int Delete<T>(T t) where T : class
+        {
+            using (var Context = new BakingEntities())
+            {
+                if (t == null) throw new Exception("t is null");
+                Context.Set<T>().Attach(t);
+                Context.Set<T>().Remove(t);
+                return Context.SaveChanges();
+            }
+        }
+
+        public void Delete<T>(IEnumerable<T> tList) where T : class
+        {
+            using (var Context = new BakingEntities())
+            {
+                foreach (var t in tList)
+                {
+                    Context.Set<T>().Attach(t);
+                }
+                Context.Set<T>().RemoveRange(tList);
+                Context.SaveChanges();
+            }
+           
+        }
+
+        public List<T> Find<T>() where T : class
+        {
+            using (var Context = new BakingEntities())
+            {
+                return Context.Set<T>().ToList();
+            }
+        }
+        public T Find<T>(int id) where T : class
+        {
+            using (var Context = new BakingEntities())
+            {
+                return Context.Set<T>().Find(id);
+            }
+        }
+
+        public int Insert<T>(T t) where T : class
+        {
+            using (var Context = new BakingEntities())
+            {
+                Context.Set<T>().Add(t);
+                return Context.SaveChanges();
+            }        
+        }
+
+        public int Insert<T>(IEnumerable<T> tList) where T : class
+        {
+            using (var Context = new BakingEntities())
+            {
+                Context.Set<T>().AddRange(tList);
+                return Context.SaveChanges();
+            }
+  
+        }
+
+        public IQueryable<T> Query<T>(Expression<Func<T, bool>> funcWhere) where T : class
+        {
+            using (var Context = new BakingEntities())
+            {
+                return Context.Set<T>().Where<T>(funcWhere);
+            }
+              
+        }
+
+        public int Update<T>(T t) where T : class
+        {
+            if (t == null) throw new Exception("t is null");
+            using (var Context = new BakingEntities())
+            {
+                Context.Set<T>().Attach(t);//将数据附加到上下文，支持实体修改和新实体，重置为UnChanged
+                Context.Entry<T>(t).State = EntityState.Modified;
+                return Context.SaveChanges();
+            }
+
+        }
+
+        public void Update<T>(IEnumerable<T> tList) where T : class
+        {
+            using (var Context = new BakingEntities())
+            {
+                foreach (var t in tList)
+                {
+                   Context.Set<T>().Attach(t);
+                    Context.Entry<T>(t).State = EntityState.Modified;
+                }
+                Context.SaveChanges();
+            }
+
+        }
+        public int UpdateListParas<T>(IEnumerable<T> tList) where T : class
+        {
+            using (var Context = new BakingEntities())
+            {
+                foreach (var t in tList)
+                {
+                    Context.Set<T>().Attach(t);
+                    Context.Entry<T>(t).State = EntityState.Modified;
+                }
+                return Context.SaveChanges();
+            }
+          
+        }
+        public virtual void Dispose()
+        {
+            //if (this.Context != null)
+            //{
+            //    this.Context.Dispose();
+            //}
+        }
+       
+        public DataTable GetDataTable(string sql)
+        {
+            lock(_lockObj)
+            {
+                MySqlConnection conn = new MySqlConnection();
+                using (var Context = new BakingEntities())
+                {
+                    conn.ConnectionString = Context.Database.Connection.ConnectionString;
+                }
+                
+                if (conn.State != ConnectionState.Open)
+                {
+                    conn.Open();
+                }
+
+                MySqlCommand cmd = new MySqlCommand();
+                cmd.Connection = conn;
+                cmd.CommandText = sql;
+
+                MySqlDataAdapter adapter = new MySqlDataAdapter(cmd);
+                DataTable table = new DataTable();
+                adapter.Fill(table);
+
+                conn.Close();//连接需要关闭
+                conn.Dispose();
+                return table;
+            }
+           
+        }
+    }
+}