How do I create connection string programmatically to MS SQL in Entity Framework 6?

Question

How do I create connection string programmatically to MS SQL in Entity Framework 6?

I'm using c# and WPF and I was wondering if someone could show me how or link me to a resource that shows how to set up connection strings programmatically in EF 6. The MSDN article explains that you can http://msdn.microsoft.com/en-us/data/jj680699#moving but it doesn't go into creating actual connection strings.

So here is an EF6 example that works

App.Config

entityFramework codeConfigurationType="WPFwithEF.SqlConfiguration, WPFwithEF"> /entityFramework

context

public class ProductContext : DbContext
{  
    public ProductContext():base("Wpf")
    { }
    public DbSet<Category> Categories { get; set; }
    public DbSet<Product> Products { get; set; }
}

Configuration.cs

namespace WPFwithEF
{
public class SqlConfiguration : DbConfiguration
{

    public SqlConfiguration()
    {
        SetProviderServices(SqlProviderServices.ProviderInvariantName,SqlProviderServices.Instance);           
        SetDefaultConnectionFactory(new SqlConnectionFactory());
    }
}
}

but if the context base is "name=Wpf" then this set up does not work is there a way to make that work? And i'm looking for the latest EF6 not the old way to do it.

Answer 1

You can use the EntityConnectionStringBuilder as descriped here: How to: Build an EntityConnection Connection String

Answer 2

If you are specifically connecting to a MS Sql database, this should work:

private DbConnection CreateConnection(string connectionString)
{
    return new SqlConnection(connectionString);
}

private string CreateConnectionString(string server, string databaseName, string userName, string password)
{
    var builder = new SqlConnectionStringBuilder
    {
        DataSource = server, // server address
        InitialCatalog = databaseName, // database name
        IntegratedSecurity = false, // server auth(false)/win auth(true)
        MultipleActiveResultSets = false, // activate/deactivate MARS
        PersistSecurityInfo = true, // hide login credentials
        UserID = userName, // user name
        Password = password // password
    };
    return builder.ConnectionString;
}

how to use:

public void ConnectoToDbWithEf6()
{
    using(var connection = CreateConnection(CreateConnectionString("server", "db", "you", "password")
    {
        using(var context = new YourContext(connection, true))
        {
            foreach(var someEntity in context.SomeEntitySet)
            {
                Console.WriteLine(someEntity.ToString());
            }
        }
    }

}

see https://msdn.microsoft.com/en-Us/library/system.data.sqlclient.sqlconnectionstringbuilder%28v=vs.100%29.aspx