I had the same problem but this link got me on the track to something that worked at least for me. I hope this helps someone at least! :)
- Create a database
- Add the aspnet tables to the new database
- Fix the database connections in web.config so they point to the same database
- Write some sql that removes all tables except the ones that start with "aspnet_"
- Add the sql to the database initializer you write by your self
- Add a call to the database initializer in Global.asax.cs
1. Create a database
I usually do this with SQL Server Management Studio. The database I used for this example code is SQL Server 2008R2 but I have done the same with SQL Server Express that you use.
2. Add the aspnet tables to the new database
I use the following tool which if you use it without any command line arguments works like a wizard.
%windir%\Microsoft.NET\Framework\v4.0.30319\aspnet_regsql.exe
3. Fix the database connections so they point to the same database
The following two lines are from the test application I made. Notice that the name of the second connectionstring (MyHealthContext) is identical to the name of the DbContext I am using for my code first classes.
DbContext:
public class MyHealthContext : DbContext
{
public DbSet<Person> People { get; set; }
public DbSet<PersonAttribute> PeopleAttributes { get; set; }
}
Web.config
<add name="ApplicationServices" connectionString="Server=localhost\mssql2008r2;Database=MyHealth;Integrated Security=True;" providerName="System.Data.SqlClient"/>
<add name="MyHealthContext" connectionString="Server=localhost\mssql2008r2;Database=MyHealth;Integrated Security=True;" providerName="System.Data.SqlClient"/>
4. SQL that removes all but the aspnetdb-tables
DECLARE @cmdDropConstraints VARCHAR(4000)
DECLARE @cmdDropTables VARCHAR(4000)
-- ======================================================================
-- DROP ALL THE FOREIGN KEY CONSTRAINTS FROM THE TABLES WE WANT TO DROP
-- ======================================================================
DECLARE cursorDropConstraints CURSOR FOR
SELECT
'ALTER TABLE ['+ s.name + '].[' + t.name + '] DROP CONSTRAINT [' + f.name +']'
FROM
sys.foreign_keys f
INNER JOIN sys.tables t ON f.parent_object_id=t.object_id
INNER JOIN sys.schemas s ON t.schema_id=s.schema_id
WHERE
t.is_ms_shipped=0
AND t.name NOT LIKE 'aspnet_%'
AND t.name <> 'sysdiagrams'
OPEN cursorDropConstraints
WHILE 1=1
BEGIN
FETCH cursorDropConstraints INTO @cmdDropConstraints
IF @@fetch_status != 0 BREAK
EXEC(@cmdDropConstraints)
END
CLOSE cursorDropConstraints
DEALLOCATE cursorDropConstraints;
-- ======================================================================
-- DROP ALL THE RELEVANT TABLES SO THAT THEY CAN BE RECREATED
-- ======================================================================
DECLARE cursorDropTables CURSOR FOR
SELECT
'DROP TABLE [' + Table_Name + ']'
FROM
INFORMATION_SCHEMA.TABLES
WHERE
Table_Name NOT LIKE 'aspnet_%'
AND TABLE_TYPE <> 'VIEW'
AND TABLE_NAME <> 'sysdiagrams'
OPEN cursorDropTables
WHILE 1=1
BEGIN
FETCH cursorDropTables INTO @cmdDropTables
IF @@fetch_status != 0 BREAK
EXEC(@cmdDropTables)
END
CLOSE cursorDropTables
DEALLOCATE cursorDropTables;
5. Code for the database initializer:
Replace the "SQL CODE GOES HERE" below with the sql from step 4
public class MyHealthInitializerDropCreateTables : IDatabaseInitializer<MyHealthContext>
{
public void InitializeDatabase(MyHealthContext context)
{
bool dbExists;
using (new TransactionScope(TransactionScopeOption.Suppress))
{
dbExists = context.Database.Exists();
}
if (dbExists)
{
// Remove all tables which are specific to the MyHealthContext (not the aspnetdb tables)
context.Database.ExecuteSqlCommand(@"SQL CODE GOES HERE");
// Create all tables which are specific to the MyHealthContext (not the aspnetdb tables)
var dbCreationScript = ((IObjectContextAdapter)context).ObjectContext.CreateDatabaseScript();
context.Database.ExecuteSqlCommand(dbCreationScript);
Seed(context);
context.SaveChanges();
}
else
{
throw new ApplicationException("No database instance");
}
}
protected virtual void Seed(MyHealthContext context)
{
//TODO: Add code for seeding your database with some initial data...
}
}
6. Code that hooks in your new database initializer
To make sure that the custom database initializer isn't accidentily run in the production environment i added a #if DEBUG statement since I always compile my code in release mode before publishing.
protected void Application_Start()
{
//TODO: Comment out this database initializer(s) before going into production
#if DEBUG
Database.SetInitializer<MyHealthContext>(new MyHealthInitializerDropCreateTables()); // Create new tables in an existing database
#endif
AreaRegistration.RegisterAllAreas();
RegisterGlobalFilters(GlobalFilters.Filters);
RegisterRoutes(RouteTable.Routes);
}
