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Editorial Team
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Asked: 2026-06-17T20:50:14+00:00

The following MVC4 ef-codefirst application works fine on my computer, but nowhere else. VS

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The following MVC4 ef-codefirst application works fine on my computer, but nowhere else.

VS 2012 Ultimate and SQL Express is installed on both computers.

Both computers use this connection string:

<add name="DefaultConnection" connectionString="Data Source=(LocalDb)\v11.0;Initial Catalog=aspnet-AppointmentMVC4-20130118154339;
Integrated Security=SSPI;AttachDBFilename=|DataDirectory|\aspnet-AppointmentMVC4-20130118154339.mdf"
providerName="System.Data.SqlClient" />

When trying to access the database from computers other than the development computer:

A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 – Error Locating Server/Instance Specified)

The working machine has this DB connection:
enter image description here

Use of localDB or sqlexpress as connection does not matter; getting this to succeed matters.

DbContext class:

public class AppointmentContext : DbContext
{
    public DbSet<Appointment> Appointments { get; set; }
    public DbSet<User> Users { get; set; }
}
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1 Answer

  1. Editorial Team

    I think that LocalDB only supports local connections via named pipes protocol.
    http://www.sqlcoffee.com/SQLServer2012_0004.htm

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