Rock, Paper, Software » Entity Framework http://software.tulentsev.com Random thoughts about programming Fri, 03 Feb 2012 13:47:57 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Entity Framework, SQLExpress and remote connections http://software.tulentsev.com/2008/12/entity-framework-sqlexpress-and-remote-connections/ http://software.tulentsev.com/2008/12/entity-framework-sqlexpress-and-remote-connections/#comments Wed, 03 Dec 2008 00:04:42 +0000 Sergei Tulentsev http://software.tulentsev.com/2008/12/entity-framework-sqlexpress-and-remote-connections/ Today I had to fight one small, but highly annoying problem. It is related to Entity Framework and SQL Server connection string. When you create a .edmx file with your model, the wizard automatically inserts proper connection string to your app.config or web.config file. Well, it is not always correct string.

In my case, I have .edmx file in a class library and it worked fine when I was using it from WinForms application. But then I decided to put it on a web site. And it ceased to work. The only thing I could get from it was

SQL Server 2005 SQLExpress error: …provider: Named Pipes Provider, error 40 – Could not open connection to SQL Server

I tried many things, but in the end it turned to be some mistreatment of a connection string. Mine looks this way:

image

The problem goes away when I put a backslash instead of slash in “./SQLEXPRESS”. It looks pretty weird, because they always used forward slash in such autogenerated connection strings, didn’t they?

P.S.: Sorry about connection string being image here. :-)

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