在实体框架中从SQL Server告诉MySQL

Question

I understand this question looks odd because EF takes care of LINQ to SQL translation, but I'm maintaining an application in which queries are hardcoded and encrypted in the database itself (and written by a lawyer who certifies their correctness).

Basically I can fire the SQL text using DbContext.Database.Connection object, but these queries are written in a dialect-agnostic format. So the code performs a token substitution based on an if case bound to a configuration variable

if (Configuration.DbType == DbType.MYSQL)
    query = ReplaceForMySQL(query);
if (Configuration.DbType == DbType.SQLSERVER)
    query = ReplaceForSqlServer(query);

I can either leave the code as it is or get rid of the DbType parameter from the Web.config .

DB is bound using EF connection string. How can I tell what DBMS is currently in use? For example, in NHibernate I could test the dialect from the ISessionFactory or the Configuration

Answer 1

The shortest way would be

context.Database.Connection.GetType().Name

where context is a DbContext instance. This gives you the actual type of the DbConnection that's used by EF, from which you can easily tell which provider is in play.

(If this is correct please have it certified with your lawyer ﾂ)