Get the Entity Framework Connection String

Question

We use Entity Framework 5, but have a requirement to ALSO use a normal database connection from the application for some custom SQL we need to perform.

So, I am creating

Answer 1

Here's how to get the connection string in EF 5, EF 6 and EF Core 1/EF 7.

//Entity Framework 5
myContext.Database.Connection.ConnectionString
//Entity Framework 6
myContext.Database.Connection.ConnectionString
//Entity Framework Core 1
myContext.Database.GetDbConnection().ConnectionString

For more details see - http://nodogmablog.bryanhogan.net/2016/04/entity-framework-checking-the-connection-string-of-your-context/

Answer 2

Yes you can.

See here for 3 options.

1 - use separate connection string for each

2 - extract it from your entity object (this is what i think you want)

3 - use the entity object to execute your custom SQL

Here's how to do nr 2:

using System.Data.EntityClient;
using System.Data.SqlClient;
...
private string GetADOConnectionString()
{
    SalesSyncEntities ctx = new SalesSyncEntities(); //create your entity object here
    EntityConnection ec = (EntityConnection)ctx.Connection;
    SqlConnection sc = (SqlConnection)ec.StoreConnection; //get the SQLConnection that your entity object would use
    string adoConnStr = sc.ConnectionString;
    return adoConnStr;
}

Answer 3

Hope it helps..

    private readonly ApplicationDbContext _applicationDbContext;
    string connectionString = string.Empty;

    public CommonService(ApplicationDbContext applicationDbContext)
    {
        _applicationDbContext = applicationDbContext;
        connectionString = _applicationDbContext.Database.GetDbConnection().ConnectionString;
    }

Answer 4

even in EF3 you can use EntityConnectionStringBuilder.

EntityConnectionStringBuilder conn = 
    new EntityConnectionStringBuilder(DBEntities.dbConnection);
SqlConnection s = new SqlConnection(conn.ProviderConnectionString);

Answer 5

In my case I just needed to execute an update statement so I used the following construct

_db.Database.ExecuteSqlCommand($"update ChiusureTurni set esportato = 1 where idChiusuraTurni = {idChiusura}");

where _db is my db context in this case I took advatage of transaction management