ASP.NET MVC Application Using Entity Framework Code First

A Visual Studio 2013 project which shows how to use the Entity Framework 6 in an ASP.NET MVC 5 web application project, using the Code First development approach.

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3/9/2015
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  • Seed method do not populate test data in student table in database
    2 Posts | Last post Wed 9:05 PM
    • Hi Tom!
      I've read up to page 33 and implementation of your project. But when run project do not any data in tables! when I add a record in student table in database, I see it on browser. I check any problem in my project but i can not find any it in. When I place break point in seed method and debug my or your project (before I deleted database), re-create database but EF do not call seed method to populate test data in database. Pleas help me. Very Thansk.  
    • If you run the project without executing the update-database command first, EF will run the createifnotexists initializer and the migrations Seed method won't run.  Try changing the database name in Web.config and running update-database.
  • Identity 2.0 Plans?
    2 Posts | Last post July 20, 2015
    • Hi,
      I was wondering if there were any future plans of implementing login entity framework functionality using Identity 2.0 ?
      
      Thanks :-)
    • Probably not for this example.  The tutorial series is already quite long at 12 substantial tutorials, and a similarly long one could be done for identity itself.  The more topics you try to do in one tutorial, the less well you can do for any one of the topics.  For identity tutorials, see http://asp.net/identity.
  • No dependency injection used?
    3 Posts | Last post July 14, 2015
    • Hi,
      I downloaded and trying to get around with the Contoso University sample. So as I understand no additional repositories and unitofwork patterns need to be implemented since EF 6 incorporates these? What about the dependency injection? I don't see the dependency injection implemented here. why? Thanks.
    • The tutorial series and the sample app it creates isn't a comprehensive introduction to programming best practices; its purpose is to teach EF with MVC, so it avoids adding in other topics that might divert attention from EF/MVC. Mike Wasson has a great introduction to DI with Web API, and the principles for MVC are similar:
      http://www.asp.net/web-api/overview/advanced/dependency-injection
      
      
    • @RajivSKulkarni
      
      You may find this interesting http://mehdi.me/ambient-dbcontext-in-ef6/ It avoids a unit of work. It uses a service layer an dependency injection.
      
  • Null reference when saving a student with non-existing ID
    3 Posts | Last post June 12, 2015
    • Hi there,
      I found an issue in Contoso University. It is possible to tamper the HTTP Post when saving a student and provided a non-existing ID. As a result, the lookup will return a null response that fails.
      It is necessary to verify the object. I wrote a blog post here http://blog.michaelhidalgo.info/2015/06/a-bug-in-contoso-university-sample.html
    • That's not an issue. If you think this is important, you could check the ID before you post.
    • It is an issue, the code does not check if the studentToUpdate object is null.
      
      Note that this code is also vulnerable to 'Insecure Direct Object References' https://www.owasp.org/index.php/Top_10_2010-A4-Insecure_Direct_Object_References.
       
      I should not be allowed to modify a student just by changing the student ID, I would expect a HTTP 401 Not Authorized   :).
  • Creating DB using VS2015
    1 Posts | Last post June 05, 2015
    • Using Visual Studio Community 2015RC the app could not create and load the database.
      
      As explained in this link http://bit.ly/1GpaxN4 starting with this VS2015, the team is moving away from version dependent connection strings. That means, once you adopt VS 2015, you have the option of using a version independent  connection string moving forward. 
      To fix this issue for now, and future versions of Visual Studio, replace the version dependent connection string (e.g. “v11.0”) with “MSSQLLocalDB”.
      
      So open the Web.config file and change the connectionString as follows:
      
      From:
      connectionString="Data Source=(LocalDb)\v11.0;Initial Catalog=ContosoUniversity2;Integrated Security=SSPI;"
      
      To:
      connectionString="Data Source=(LocalDb)\MSSQLLocalDB;Initial Catalog=ContosoUniversity2;Integrated Security=SSPI;"
      
  • Why i can't see navbar-toggle display
    2 Posts | Last post June 04, 2015
    • I see in _Layout.cshtml have declare navbar-toggle button, but when i run app, it doesn't appear
    • That is code from the Visual Studio new-project template that I don't make use of in this sample application.
  • Getting a NuGet Package restore failed error
    2 Posts | Last post May 15, 2015
    • I've downloaded and extracted the files. Then I opened it in VS 2013 and built it. Only it failed with 187 errors. The first one, which I suppose it at the route of it all, reads as follows:
      
      "NuGet Package restore failed for project ContosoUniversity: The request was aborted: Could not create SSL/TLS secure channel.."
      
      Suggestions?
    • Well, I tried building it a second time, and this time it worked. Don't know why, but whatever.
      
      Thanks anyway.
  • Can't create database
    3 Posts | Last post May 12, 2015
    • Hi, I downloaded the code and i builded the solution successfully. But when i run the Update-Database command in the Package Manager Console, i got an error 'Cannot find the object "dbo.Student" because it does not exist or you do not have permissions' .
      How can i do?
    • Try changing the database name in web.config and re-running the update-database command.
    • I am according to the tutorial created a database with the same name before download the code, Problem is solved after i delete the database. Thanks for your help. 
  • MVC6
    2 Posts | Last post March 02, 2015
    • Very helpful resource! Are there plans to update it to MVC6?
    • Yes there are plans, but MVC6 is still changing rapidly, and long tutorial series like the one this is based on are time-consuming to revise, so it's usually not practical while a product is still in preview/beta phases.  The tutorial and project most likely won't be updated until the MVC6/EF7 is released and thus relatively stable.
  • Where is the source code to the VS 2010 MVC 3 version?
    8 Posts | Last post January 10, 2015
    • I have the E-Book "Getting Started with the Entity Framework 4.1 Using ASP.NET MVC".pdf which states that the requirements are VS 2010 SP1.  I've fulfilled that and the other requirements.  However, the link "download the completed application" brings me HERE and the requirements to create, build and run the sample are now different.  
      
      So, where is the source code to the VS 2010 MVC 3 version?  I don't WANT to build the "latest" version - for a SPECIFIC REASON.  
    • Here's a link to the C# MVC 3 project: 
      
      http://archive.msdn.microsoft.com/Project/Download/FileDownload.aspx?ProjectName=aspnetmsdnexamples&DownloadId=16474
      
      We forgot to re-post the old version somewhere when we updated the sample for MVC 4 EF 5.
    • Thank you, Tom.  Much appreciated.
    • Hi Tom,
      I was aslo looking for the MVC 3 version sample code and tried the URL you have mentioned here. But it is not available there. So can you please share the correct link to download MVC3 with EF 4.1 sample code.
      
      Hi vedicwarrior
      If you got the sample, please share it, this would be really helpful.
    • @kpant, I'm sorry but the site where we were hosting the download was retired rather suddenly without our team getting enough advance notice to find an alternative. We're working on getting the files back and finding a new hosting location and when that happens I'll provide a new link.
    • @kpant - The MVC3 sample is now hosted at http://code.msdn.microsoft.com/Getting-Started-with-abeed7be.
    • @Cephas Lin -Thanks Cephas , I got the source code under your Samples.
    • i also used thanks for sharing, is it true on my website www.medyator.net
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