Hello All,

During a migration of a simple website from Visual Studio 2010 Express to Visual Studio 2012 Express, I experienced a number of problems. Becuase of the numerous technologies involved (i.e. AJAX version, IIS version, SQL Server version, .NET Framework version), it got more complicated than I ever expected.

Here's the deal: I thought I'd keep it simple and just leave the project targeting .NET 4.0 since the hosting Windows Server 2008R2 IIS 7.5 web server has that application pool setup already from the previous release. Furthermore, the database I'm connecting to now resides on SQL Server 2012 Standard Edition instead of the prior connection to a SQL Server 2008R2 Standard Edition database.

After "fixing" a number of other issues that came up, I'm now faced with errors with the Entity Framework I put in place (that had been working great). So I tried to re-add the Entity Framework object which seemed to blow up the entire project with errors and warnings in the IDE. The structure of the Entity model is different from when it was built in Visual Studio 2010, which throws off all my other code.

Any thoughts or suggestions?

Also, I'd like to hear from folks who have any experience in migrating their website projects to Visual Studio 2012 with .NET 4.5 from Visual Studio 2010 with .NET 4.0.

search terms:
migrating from .net 4.0 to 4.5
migrating from Visual Studio 2010 to Visual Studio 2012
project upgrade to 2012
website upgrade to 2012

Hi there,

For the EF issue, you can right-click an empty spot of the designer surfacem press F4 to open the Properties Grid and then change the Code Generation Strategy property from None to Default. This generates code similar to how it did in VS 2010.

I've had various results migrating. Sometimes it was very easy, sometimes I ran into problems like yours. Usually, updating references or the web.config file and modifying the EF model fixes it for me.

Imar

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Imar Spaanjaars
http://Imar.Spaanjaars.Com
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Author of Beginning ASP.NET 4.5 : in C# and VB, Beginning ASP.NET Web Pages with WebMatrix
and Beginning ASP.NET 4 : in C# and VB.
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