EF 连接到 Azure-SQL

 

using Autofac;
using Autofac.Integration.Mvc;
using System;
using System.Collections.Generic;
using System.Data.Common;
using System.Data.Entity;
using System.Data.Entity.Infrastructure;
using System.Data.Entity.Infrastructure.DependencyResolution;
using System.Data.Entity.Infrastructure.Interception;
using System.Data.Entity.SqlServer;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;
using WebApplication3.Models;

namespace WebApplication3
{
    public class MvcApplication : System.Web.HttpApplication
    {
        protected void Application_Start()
        {
            
            var builder = new ContainerBuilder();
            builder.RegisterControllers(typeof(MvcApplication).Assembly);
            builder.Register<UserContext>((_) => new UserContext());
            builder.Register<IDbInterceptor>((_) => new MyNLogInterceptor());

            builder.Register<Func<IDbExecutionStrategy>>((_) => () => new SqlAzureExecutionStrategy());
            builder.Register<Func<TransactionHandler>>((_) => () => new CommitFailureHandler());

            var container = builder.Build();

            
            DependencyResolver.SetResolver(new AutofacDependencyResolver(container));



            //添加一个依赖关系解析
            DbConfiguration.Loaded += (s, e) =>
                e.AddDependencyResolver(new MyAutofacDependencyResolver(container), overrideConfigFile: false);

            AreaRegistration.RegisterAllAreas();
            RouteConfig.RegisterRoutes(RouteTable.Routes);
        }
    }

    public class MyNLogInterceptor : IDbCommandInterceptor
    {
        private static NLog.Logger logger = NLog.LogManager.GetCurrentClassLogger();

        public void NonQueryExecuting(DbCommand command, DbCommandInterceptionContext<int> interceptionContext)
        {
        }

        public void NonQueryExecuted(DbCommand command, DbCommandInterceptionContext<int> interceptionContext)
        {
            LogCommandComplete(command, interceptionContext);
        }

        public void ReaderExecuting(DbCommand command, DbCommandInterceptionContext<DbDataReader> interceptionContext)
        {
        }

        public void ReaderExecuted(DbCommand command, DbCommandInterceptionContext<DbDataReader> interceptionContext)
        {
            LogCommandComplete(command, interceptionContext);
        }

        public void ScalarExecuting(DbCommand command, DbCommandInterceptionContext<object> interceptionContext)
        {
        }

        public void ScalarExecuted(DbCommand command, DbCommandInterceptionContext<object> interceptionContext)
        {
            LogCommandComplete(command, interceptionContext);
        }

        private void LogCommandComplete<TResult>(DbCommand command, DbCommandInterceptionContext<TResult> interceptionContext)
        {
            if (interceptionContext.Exception == null)
            {
                logger.Trace("Command completed with result {0}", interceptionContext.Result);
                logger.Trace(command.CommandText);
            }
            else
            {
                logger.WarnException("Command failed", interceptionContext.Exception);
                logger.Trace(command.CommandText);
            }
        }
    }

    public class MyAutofacDependencyResolver : IDbDependencyResolver
    {
        private ILifetimeScope container;

        public MyAutofacDependencyResolver(ILifetimeScope container)
        {
            this.container = container;
        }

        public object GetService(Type type, object key)
        {
            if (container.IsRegistered(type))
            {
                return container.Resolve(type);
            }

            return null;
        }

        public IEnumerable<object> GetServices(Type type, object key)
        {
            if (container.IsRegistered(type))
            {
                return new object[] { container.Resolve(type) };
            }

            return Enumerable.Empty<object>();
        }
    }
}

    builder.Register<Func<IDbExecutionStrategy>>((_) => () => new SqlAzureExecutionStrategy());：使用SsqlAzure 执行策略
    builder.Register<Func<TransactionHandler>>((_) => () => new CommitFailureHandler());：注册一个事物处理程序

 使用指定的依赖关系解析程序接口，为依赖关系解析程序提供一个注册点,给MVC提供依赖关系解析。
 DependencyResolver.SetResolver(new AutofacDependencyResolver(container));

   

 添加一个依赖关系解析，为EF提供依赖关系解析
 DbConfiguration.Loaded += (s, e) =>
 e.AddDependencyResolver(new MyAutofacDependencyResolver(container), overrideConfigFile: false);

 MyNLogInterceptor：它可以侦听EF发送到数据库的命令

 private void LogCommandComplete<TResult>(DbCommand command, DbCommandInterceptionContext<TResult> interceptionContext)
        {
            if (interceptionContext.Exception == null)
            {
                成功记录日志，命令和完成结果
                logger.Trace("Command completed with result {0}", interceptionContext.Result);
                logger.Trace(command.CommandText);
            }
            else
            {   失败记录日志，命令和异常
                logger.WarnException("Command failed", interceptionContext.Exception);
                logger.Trace(command.CommandText);
            }
        }

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using WebApplication3.Models;

namespace WebApplication3.Controllers
{
    public class HomeController : Controller
    {
        public UserContext Ucontext;
        public HomeController(UserContext context)
        {
            this.Ucontext = context;
        }
        // GET: Home
        public ActionResult Index()
        {
            User user = new User { Name = "2", Pwd = "21" };
            Ucontext.Users.Add(user);

            Ucontext.SaveChanges();


            return Content("Yes");
        }
        protected override void Dispose(bool disposing)
        {
            if (disposing)
            {
                Ucontext.Dispose();
            }
            base.Dispose(disposing);
        }
    }
}

 

   释放资源

 protected override void Dispose(bool disposing)
        {
            if (disposing)
            {
                Ucontext.Dispose();
            }
            base.Dispose(disposing);
        }

 

实现依赖解析 和  日志记录  还要引入两个包。

1.NLog 2.Autofac


引入Nlog包之后到开Nlog.config取消注释，运行程序之后点击显示所有文件
将会出现一个Logs的文件，日志就在里面。

 
当我运行程序之后，成功创建了数据。

  日志文件

返回受影响行数一行，因为我只插入了一行吗。
希望你能从中获益:)