Entity Framework 5 with Code First Connection String Error - entity-framework-5

Question

Alright, I have googled this all morning and I can really use some help. I am following along a book by Adam Freeman (Pro ASP.Net MVC 4) and I am stuck in Chapter 7. BTW, I am not sure why Apress does not have support forum like Wrox where authors can help people get unstuck with examples in their book.
Anyway, the book used a database first to EF, following the book, I created a localDB, defined DB schema and added some sample data.Then created this DBcontext
using System.Data.Entity;
using SportsStore.Domain.Entities;
namespace SportsStore.Domain.Concrete
{
class EFDbContext : DbContext
{
public DbSet<Product> Products { get; set; }
}
}
And then here is the connection string
<connectionStrings>
<add name="EFDbContext" connectionString="Data Source=(localdb)\v11.0;Initial Catalog=SportsStore;Integrated Security=True" providerName="System.Data.SqlClient"/>
</connectionStrings>
And also, here is some settings that I guess was auto added by EF/Nuget during installation
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="v11.0" />
</parameters>
</defaultConnectionFactory>
</entityFramework>
The error message is all over the place, as I keep messing wit it, the error messages keep changing but they all point to something about Entity Framework. Please help, any assistance is greatly appreciated so I can proceed with my self study.
The current error message is "The configuration section 'entityFramework' cannot be read because it is missing a section declaration"
Config Source:
96: </runtime>
97: <entityFramework>
98: <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">

Answer 1

To try and get a handle on the error, could you specify your connection string name in the constructor:
using System.Data.Entity;
using SportsStore.Domain.Entities;
namespace SportsStore.Domain.Concrete
{
public class EFDbContext : DbContext
{
public EFDbContext() : base("EFDbContext") {}
public DbSet<Product> Products { get; set; }
}
}
make sure that the string you pass in for the name matches the "name" attribute in your web.config
<connectionStrings>
<add name="EFDbContext" connectionString="Data Source=(localdb)\v11.0;Initial Catalog=SportsStore;Integrated Security=True" providerName="System.Data.SqlClient"/>
</connectionStrings>
If that doesn't work, try using the "name=" addition, as below (useful reference here). This should force EF5 to throw an error you can use for diagnostics if it doesn't find the connection string in the config file.:
namespace SportsStore.Domain.Concrete
{
public class EFDbContext : DbContext
{
public EFDbContext() : base("name=EFDbContext") {}
public DbSet<Product> Products { get; set; }
}
}
If that doesn't work, then we'll need some exception details from you.
EDIT:
"The configuration section 'entityFramework' cannot be read because it is missing a section declaration"
Your entityFramework section should look like this, be careful that it is a direct child of the element:
<configuration>
<configSections>
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
<!-- other section and sectionGroup declarations -->
</configSections>
<!-- other sections -->
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="v11.0" />
</parameters>
</defaultConnectionFactory>
</entityFramework>
<!-- other sections -->
</configuration>

Answer 2

I used ASP.NET Core 1.0 RC1. For me it didn't work because of web.config. The problem was with web.config file. At the beginning my config file looks like that:
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<system.webServer>
<handlers>
<add name="httpPlatformHandler" path="*" verb="*" modules="httpPlatformHandler" resourceType="Unspecified"/>
</handlers>
<httpPlatform processPath="%DNX_PATH%" arguments="%DNX_ARGS%" stdoutLogEnabled="false" startupTimeLimit="3600"/>
</system.webServer>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="mssqllocaldb" />
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
</configuration>
To resolve this problem there are two ways. First is to add into web.config lines as Andy Brown shown. Be aware about diffrent version of EF.
<configuration>
<configSections>
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=7.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
</configuration>
Second is to remove whole entityFramework section.