Chpt 12 Can't get past registering the context in global.asax

NRM001 · September 24th, 2014, 08:43 AM

I am totally new to asp.net

I am running Visual Studio Express 2013.

I am using Visual Basic over C#

I created a new Dynamic Data Website.

I added an existing database (NORTHWND) by right clicking on App_Data and adding an existing item, then following the wizard.

I added new LINQ to SQL Class and followed the wizard, then dragged the tables from NORTHWND after double clicking on it.

I amended global.asax by uncommenting the line and changing the values to:

Code:

      ' The following registration should be used if YourDataContextType does not derive from DbContext
DefaultModel.RegisterContext(GetType(DataClassesDataContext), New ContextConfiguration() With {.ScaffoldAllTables = True})

When opening Default.aspx in a browser I can see the page with all the tables. Success!

When I click on a table, there is an error:

Unable to cast object of type 'DataClassesDataContext' to type 'System.Data.Objects.ObjectContext'.

Help.

When trying to follow the instructions in the book and working through the Entity Data Model, I don't even get the first page with the tables listed on it.