实体框架的 Web.config 问题答案

【问题标题】：Web.config problems with Entity Framework实体框架的 Web.config 问题
【发布时间】：2015-12-11 20:05:05
【问题描述】：

当我进入web.config 时，我是asp.net 的新手，我无法在其中找到<entityframework> 部分来更改某些设置。我目前正在使用本指南http://www.asp.net/mvc/overview/getting-started/introduction/getting-started 来帮助我完成我的项目。不知道我做错了什么，因为我已经完成了每一步。

<?xml version="1.0" encoding="utf-8"?> <!--   For more information on how to configure your ASP.NET application, please visit   http://go.microsoft.com/fwlink/?LinkId=301880   --> <configuration>   <configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->   <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 --></configSections>   <connectionStrings>
    <add name="LoftBook" connectionString="Data Source=(LocalDb)\v11.0;AttachDbFilename=|DataDirectory|\aspnet-LoftBook-20151211033930.mdf;Initial Catalog=aspnet-LoftBook-20151211033930;Integrated Security=True" providerName="System.Data.SqlClient" />   </connectionStrings>   <appSettings>
    <add key="webpages:Version" value="3.0.0.0" />
    <add key="webpages:Enabled" value="false" />
    <add key="ClientValidationEnabled" value="true" />
    <add key="UnobtrusiveJavaScriptEnabled" value="true" />   </appSettings>   <!--
    For a description of web.config changes see http://go.microsoft.com/fwlink/?LinkId=235367.

    The following attributes can be set on the <httpRuntime> tag.
      <system.Web>
        <httpRuntime targetFramework="4.5.1" />
      </system.Web>   -->   <system.web>
    <authentication mode="None" />
    <compilation debug="true" targetFramework="4.5" />
    <httpRuntime targetFramework="4.5" />   </system.web>   <system.webServer>
    <modules>
      <remove name="FormsAuthenticationModule" />
    </modules>   </system.webServer>   <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Optimization" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="1.1.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="WebGrease" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-1.6.5135.21930" newVersion="1.6.5135.21930" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Helpers" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.WebPages" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-5.2.3.0" newVersion="5.2.3.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Antlr3.Runtime" publicKeyToken="eb42632606e9261f" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-3.5.0.2" newVersion="3.5.0.2" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin" publicKeyToken="31bf3856ad364e35" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin.Security" publicKeyToken="31bf3856ad364e35" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin.Security.Cookies" publicKeyToken="31bf3856ad364e35" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-7.0.0.0" newVersion="7.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin.Security.OAuth" publicKeyToken="31bf3856ad364e35" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
      </dependentAssembly>
    </assemblyBinding>   </runtime> </configuration>

using System; 
using System.Collections.Generic; 
using System.Linq; using System.Web; 
using System.Data.Entity; 
using LoftBook.Models;

namespace LoftBook.DAL {
    public class LBInitializer : System.Data.Entity.DropCreateDatabaseIfModelChanges<LBContext>
    {

        protected override void Seed(LBContext context)
        {
            var sires = new List<Sire>
            {
                new Sire {RingNo ="IHU S 2009 1143", Colour = "Blue", Breed = "Jassen",},
                new Sire {RingNo ="IHU S 2011 1467", Colour = "Red", Breed = "Jan Arden",},
                new Sire {RingNo ="IHU S 2012 2367", Colour = "Blue", Breed = "Jassen",},
            
            };

            sires.ForEach(s => context.Sires.Add(s));
            context.SaveChanges();

            var dams = new List<Dam>
            {
                new Dam {RingNo ="IHU S 2009 5362", Colour = "Blue", Breed = "Jassen",},
                new Dam {RingNo ="IHU S 2011 9203", Colour = "Red", Breed = "Jan Arden",},
                new Dam {RingNo ="IHU S 2012 2315", Colour = "Blue", Breed = "Jassen",},
            
            };

            dams.ForEach(s => context.Dams.Add(s));
            context.SaveChanges();


            var youngsters = new List<Youngster>
            {
                new Youngster {RingNo ="IHU S 2015 001", Colour = "Blue", Breed = "Jassen",},
                new Youngster {RingNo ="IHU S 2015 002", Colour = "Red", Breed = "Jan Arden",},
                new Youngster {RingNo ="IHU S 2015 003", Colour = "Blue", Breed = "Jassen",},
            
            };

            youngsters.ForEach(s => context.Youngsters.Add(s));
            context.SaveChanges();

            var pairs = new List<Pair>
            {
                new Pair {Sire = "IHU S 2009 1143", Dam = "IHU S 2009 5362", Paired = DateTime.Parse("2015-12-01"), Hatched = DateTime.Parse("2015-12-20"), Youngster = "IHU S 2015 001",},
                new Pair {Sire = "IHU S 2011 1467", Dam = "IHU S 2011 9203", Paired = DateTime.Parse("2015-12-01"), Hatched = DateTime.Parse("2015-12-19"), Youngster = "IHU S 2015 002",},
                new Pair {Sire = "IHU S 2012 2367", Dam = "IHU S 2012 2315", Paired = DateTime.Parse("2015-12-01"), Hatched = DateTime.Parse("2015-12-22"), Youngster = "IHU S 2015 003",},
            };

            pairs.ForEach(s => context.Pairs.Add(s));
            context.SaveChanges();
        }
    } }

using System;
using System.Collections.Generic; 
using System.Linq; using System.Web; 
using System.Data.Entity; 
using System.Data.Entity.ModelConfiguration.Conventions; 
using LoftBook.Models;

namespace LoftBook.DAL {
    public class LBContext : DbContext
    {

        public LBContext()
            : base("LBContext")
        {

        }


        public DbSet<Dam> Dams { get; set; }
        public DbSet<Sire> Sires { get; set; }
        public DbSet<Pair> Pairs { get; set; }
        public DbSet<Youngster> Youngsters { get; set; }
        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {

            modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
        }
    } }

提前致谢

杰森

【问题讨论】：

您要更改哪些设置？观察到的结果与您的预期结果是什么？截取您遇到问题的 web.config 部分怎么样？
如果您的解决方案中有多个项目，请确保您正在查看正确的配置文件。如果您在 MVC 项目中工作，请确保您查看的是根目录中的 web.config，而不是 MVC 区域或其他文件夹中的。
感谢大家的回复。我正在尝试“设置 EF 以使用 SQL Server Express LocalDB 数据库”，这是我在 asp.net 网站上关注的指南的标题。我确定我检查了根文件夹而不是另一个，但它并没有很混乱！
您的数据模型和 DbContext 是否与您的 mvc Web 项目在同一个项目中，或者您是否有 DataAccessLayer 或 BusinessLocicLayer？

标签： asp.net-mvc ef-code-first entity-framework-6

【解决方案1】：

首先，我认为您没有将实体框架添加到您的项目中。

1.先从 Nuget 包管理器安装实体

2.右键单击项目中的模型，然后添加>新项目将数据库添加到项目中

这是Get Start with Entity Framework的完整指南

本文说明您在 sql server 中使用 diagrams 设计了一个数据库，并且您希望从中生成模型（最简单的方法是我以前试过）

【讨论】：

您好，感谢您的回复。我已经安装了我检查了 Nuget 包管理器，它已安装在我的项目中。它仍然没有出现在 web.config 中。我正在尝试执行此“设置 EF 以使用 SQL Server Express LocalDB 数据库”，这是我正在遵循的指南的标题。
请检查您的链接，您的链接无效。您使用的是哪个版本的 Visual Studio？
好的。首先在解决方案浏览器中检查 'Reference' 以找出您有 'EntityFramework' 、 'EntityFramework.SqlServer' 等有关键字 'entity' 。如果您没有找到它们，请右键单击参考并通过单击“添加参考”添加并搜索“实体”关键字并添加它们。然后在您的项目上单击鼠标右键，然后单击“Propertise”。在“打包/发布 SQL”选项卡中，您可以为您的 EF 添加连接字符串。
我的参考资料中有 EntityFramework 和 EntityFramework.SqlServer
您是否检查了“打包/发布 SQL”选项卡？