EF 5 Changing Connection String at Runtime
Use the context constructor overload that take the connection string as a parameter.
Comments
-
Mark Kram almost 2 years
Ok, I want to recreate a project that I created using EF 4.1 to EF 5.0, simple enough or at least I thought. One of the things in my old project is that I was able to change the database connection string at runtime in EF 4.1:
using (var myContext = new MyEntities(ConnectionString)) { }
Easy-peasy but in EF 5.0 you have to do this differently:
string connectionString = "data source=LocalHost;initial catalog=MyDatabase;user id=MyUserName;password=MyPassword;multipleactiveresultsets=True;App=EntityFramework"; using (var myContext = new MyEntities()) { myContext.Database.Connection.ConnectionString = connectionString; }
Now, this took me a better part of two hours to figure out, so I guess my question is this the proper way of changing the connection string at runtime or not? If it is why did they make this change?
I did find this Link but it didn't work. I received the error as detailed in the first comment of the first answer by Ladislav Mrnka. I later found this Link which seems to work fine.
UPDATE
I re-read the first link I posted and I found another solution, I simply created a partial class:
public partial class MyEntities : DbContext { public MyEntities(string connectionString) : base(connectionString) { Database.Connection.ConnectionString = connectionString; } }