Question

I am struggling with getting a simplemembership scenario working in my EntityFramework / MVC4 / DatabaseFirst project. I’ve found plenty of examples for working with code first, but nothing for DB first.

The problem I’m encountering is the the InitializeDatabaseConnection is throwing an error (“Unable to find the requested .Net Framework Data Provider. It may not be installed.”) The code looks like this :

WebSecurity.InitializeDatabaseConnection("DALEntities", "tblContacts1", "ContactID", "EMail", autoCreateTables: true);

I am not sure what DataProvider is failing. If I try to trace ‘into’ the InitializeDatabaseConnection call, it immediately throws the error.

What am I missing?

Info:
DALEntities is the name of the connectionString that the rest of EF uses. The following code works just fine….

    public ActionResult Test() {
        using (var db = new DALEntities()) {
            var query = from i in db.TBLINVENTORies
                            orderby i.ITEMNAME
                            select i;
            var cnt = query.Count();
            string str = "Total Inventory: " + cnt;
            return Content(str);
        }
    }

My connection strings section from the web.config:

  <connectionStrings>
    <add name="DALEntities" connectionString="metadata=res://*/DAL.DAL.csdl|res://*/DAL.DAL.ssdl|res://*/DAL.DAL.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=SOMECOMPUTER;initial catalog=SOMEDB;persist security info=True;user id=SOMEID;password=SOMEPASS;multipleactiveresultsets=True;App=EntityFramework&quot;" providerName="System.Data.EntityClient" />
  </connectionStrings>

This post seems to be asking the same question (but in context of model-first), but there is no solution yet : Using SimpleMembership with EF model-first

Also, I see that there is an overload for WebSecurity.InitializeDatabaseConnection() with the help text: Initializes the membership system ((blah blah <snip> ProviderName: the name of the ADO.NET data provider. If you want to use Microsoft SQL Server, the WebMatrix.WebData.WebSecurity.InitializeDatabaseConnection(String, String, String, String, Boolean) overload is recommended . I do wish to connect to a MSSQL server…will this be required?

Answer 1

The provider giving you trouble is the one specified in your connection string which is System.Data.EntityClient. I suspect the problem is because your project is database-first whereas the simple membership is using code-first. I do not think you can mix these approaches in a single database. Try putting it back to where the DefaultConnection is used for IntializeDatabaseConnection. There should have been a DefaultConnection in your web.config generated by the MVC4 scaffolding. This connection string usually uses System.Data.SqlClient as the provider.

If you want to keep the simple membership in the database used to store domain information (i.e. DALEntities) then you will need to change your method for using EF on the domain to code-first. If you want to keep your project database-first you need to design your own membership schema in the database and develop custom member and role providers. This is probably the best approach if you are really trying to integrate user information into your domain model.