The Entity Framework and ASP.NET – Getting Started Part 5http://www.asp.netThu, 28 Mar 2013 18:56:59 GMTumbracoComments for The Entity Framework and ASP.NET – Getting Started Part 5enComment Posted by boxershttp://www.asp.net/web-forms/tutorials/getting-started-with-ef/the-entity-framework-and-aspnet-getting-started-part-5Sat, 01 Jan 2011 05:47:10 GMT00000000-0000-0000-0000000011376the vb code in the download contains an error:

Private Sub PopulateDropDownLists()

Using context = New SchoolEntities()

Dim allCourses = context.Courses() !!amended code here !!!!

Dim instructorID = Convert.ToInt32(InstructorsDropDownList.SelectedValue)

Dim instructor ...... etc etc

the original was:

Dim AllCourses = context.GetCourses

and this has really confused the issue as it certainly is the name of an SP in schools mdf. I am still trying to understand this .. any comments welcome in understanding the entity framework would be gratefully received !

]]>Comment Posted by tdykstrahttp://www.asp.net/web-forms/tutorials/getting-started-with-ef/the-entity-framework-and-aspnet-getting-started-part-5Fri, 14 Jan 2011 14:04:40 GMT00000000-0000-0000-0000000011531@boxers

The issue here is that the download shows the result after all tutorials are done, and a later tutorial imports that stored procedure so that it can use GetCourses here.

]]>Comment Posted by codeguru413http://www.asp.net/web-forms/tutorials/getting-started-with-ef/the-entity-framework-and-aspnet-getting-started-part-5Sat, 15 Jan 2011 20:39:27 GMT00000000-0000-0000-0000000011547There's a much easier way to get all the assigned vs. unassigned courses. You have already retrieved all courses; and you have already retrieved all assigned courses. To get the unassigned courses, the code is simply one line long:

List<Course> unassignedCourses = allCourses.Except(assignedCourses);

This line uses the IEnumerable<TSource> Except(IEnumerable<TSource> second) method which returns the set difference between allCourses and assignedCourses.

]]>Comment Posted by tdykstrahttp://www.asp.net/web-forms/tutorials/getting-started-with-ef/the-entity-framework-and-aspnet-getting-started-part-5Sun, 16 Jan 2011 10:52:19 GMT00000000-0000-0000-0000000011557Many thanks for the suggestion - I will update the tutorial.

]]>Comment Posted by ShaunLuttinhttp://www.asp.net/web-forms/tutorials/getting-started-with-ef/the-entity-framework-and-aspnet-getting-started-part-5Fri, 03 Jun 2011 20:30:42 GMT00000000-0000-0000-0000000013391These tutorials bring up in me a sense of mastery of the ASP.NET Entity Framework. I find the progression to be very encouraging in its pace of introducing new concepts. Congratulations on writing a pithy, relevant, and motivational tutorial.

]]>Comment Posted by georges_cioabahttp://www.asp.net/web-forms/tutorials/getting-started-with-ef/the-entity-framework-and-aspnet-getting-started-part-5Thu, 17 Nov 2011 15:37:29 GMT00000000-0000-0000-0000000014650This is a great tutorial. Good job. And thank you

]]>Comment Posted by yogeshrajhttp://www.asp.net/web-forms/tutorials/getting-started-with-ef/the-entity-framework-and-aspnet-getting-started-part-5Thu, 28 Mar 2013 05:59:36 GMT00000000-0000-0000-0000000018795Can anyone please elaborate what the following error means and how to rebuild the project using metadata

"metadata specified in the connectionstring could not be loaded. Consider rebuild the web project to build assemblies that may contain metadata. The following error(s) occurred : unable to load the specified metadata source" The tutorial simply says - TheNote: If you get the following dialog box at this point, you have to build the project before proceeding. " It needs some elaboration Kindly help

]]>Comment Posted by tdykstrahttp://www.asp.net/web-forms/tutorials/getting-started-with-ef/the-entity-framework-and-aspnet-getting-started-part-5Thu, 28 Mar 2013 18:56:59 GMT00000000-0000-0000-0000000018804@yogeshraj - If you continue to get the error after rebuilding the project, try downloading the completed project and see if you get the same error; if it works you can compare the downloaded code to what you created by following the steps to see if you missed a step.

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