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Entity framework practices

People who are using entity framework for Dal single dbcontext is going to be a problem in BLL. I use the following structure

 

I used to get the single dbContext by:- Each single repo class should inherit from base repo class and in base repo class should initialise the dbcontext.

 

The BaseRepository

 

  public class BaseRepo

    {

       private readonly bool isNewInstance;

       protected OnlineProductLinkEntitiesdbContext;

 

 

       protected BaseRepository()

       {

           dbContext = newOnlineProductLinkEntities();

           isNewInstance = true;

       }

 

       protectedBaseRepository(OnlineProductLinkEntitiesdbContext)

       {

           isNewInstance = dbContext == null;

 

           if (isNewInstance)

               dbContext = newOnlineProductLinkEntities();

 

           this.dbContext = dbContext;

       }

 

       protected voidCheckAndTryToOpenConnection()

       {

           if (dbContext == null)

               dbContext = newOnlineProductLinkEntities();

           if (dbContext.Connection.State !=ConnectionState.Open)

               dbContext.Connection.Open();

       }

 

       public void Dispose()

       {

           if ((!isNewInstance) || (dbContext ==null))

               return;

 

           OnlineProductLinkEntities context = (OnlineProductLinkEntities)dbContext;

 

           if (context.Connection.State ==ConnectionState.Open)

           {

               context.Connection.Close();

           }

 

           context.Dispose();

           dbContext=null; 

       }

}

 

The single repo class constructor looks like

 

    public Cmo_SiteRepository(){}  

 

    public singleRepo (OnlineProductLinkEntitiesdbContext):base(dbContext), Irepository<model, entity>

       { }

 

 

A method inside the single repo class will look like this

 

    public int Create(SiteModel model)

       {

           try

           {

               CheckAndTryToOpenConnection();

               objectTable siteEntity = newobjectTable ();

           }

           catch (Exception ex)

           {

               throw new Exception("Exception", ex);

           }

       }

 

 

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