Change Database during runtime in Entity Framework, without changing the Connection

Question

I have a server that hosts 50 databases with identical schemas, and I want to start using Entity Framework in our next version.

I don\'t need a new connection for ea

Answer 1

EntityConnection.ChangeDatabase method is not supported, but SqlConnection.ChangeDatabase works fine.

So you have to use SqlConnection in entity framework database's constructor:

using MvcMyDefaultDatabase.Models;
using System.Data.Metadata.Edm;
using System.Data.SqlClient;
using System.Data.EntityClient;
using System.Configuration;
using System.Reflection;

    public ActionResult List(string Schema)
    {
        SqlConnection sqlConnection = new SqlConnection(ConfigurationManager.ConnectionStrings["MyConnectionString"].ConnectionString);

        MetadataWorkspace workspace = new MetadataWorkspace(new string[] { "res://*/" }, new Assembly[] { Assembly.GetExecutingAssembly() });

        EntityConnection entityConnection = new EntityConnection(workspace, sqlConnection);

        sqlConnection.Open();

        sqlConnection.ChangeDatabase(Schema);

        Models.MyEntities db = new MyEntities(entityConnection);

        List MyTableRecordsList = db.MyTableRecords.ToList();

        return View(MyTableRecordsList);
    }

With this code you can read the tables with the same format (same table name and same fields) of several schema passing the database name in the "Schema" string.