CODEWITHSUNDEEP
c#sqlsql-serverasp.net-mvcentity-framework
Luis Valencia
Luis Valencia

Reputation: 34038

EF6 with localdb v13 underlying connection failed to open

I have a simple console app with EF6, my PC has localdb v13 and when I try to connect to the EF database, I get this error

{"Cannot open database \"NinjaDomain.DataModel.NinjaContext\" requested by the login. The login failed.\r\nLogin failed for user 'xx\\xx.yy'."}

this is the app.config

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
  </startup>
  <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>

Upvotes: 1

Views: 780

Answers (1)

Bassam Alugili
Bassam Alugili

Reputation: 17043

It is does not matter Console app might also have an App.config, normally if you have installed EF from Package Manager Console like that:

install-package entityframework

The app.config will be automatically added to your project file.

This is the default connection string, if the do not have it the app.config (related to EF v 6.1.3)

"Data Source=(localdb)\\mssqllocaldb;Initial Catalog=MyConsoleApplication.Program+MyDbContext;Integrated Security=True;MultipleActiveResultSets=True"

Below, I have changed the app.config (If you do not have you can just add it to your project) and I have provided the connection string

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1" />
  </startup>
  <connectionStrings>
    <add name="DatabaseConnectionString"
         connectionString="Integrated Security=SSPI; Initial Catalog=UsersDatabase5; Data Source=.\;" providerName="System.Data.SqlClient" />
  </connectionStrings>
  <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>

You should pass the connection string to the DbContext constructor with 'name' keyword like that:

using (var myDbContext = new MyDbContext("name=" + "DatabaseConnectionString"))
{
 ....

I have used the normal SQL Server in my app.config example:

Data Source=.\;

You can change it:

Data Source=(localdb)\\mssqllocaldb;

or just check your SQL Server instance name (use SSM or command line).

Upvotes: 1

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