在Visual Studio 2012或更高版本中使用Npgsql和Entity Framework的MVC4

Question

I have VS2012 and I want to connect to postgresql with Entity Framwork (ADO.NET) but the best solution I found seems to be for VS2010.

I followed this tutorial using VS2012 but when I build the project I get the error The name 'VSConstants' does not exist in the current context among others. I cannot figure out what the error means.

I even tried installing dotconnect for postgre but after installing the required libraries and adding DBfactory connection string, I still do not see .NET data provider for PostgreSQL in my data connection dialogue. I wonder what I am not doing right. I am stuck here. I hope my question is clear enough. Help please

Answer 1

I even tried installing dotconnect for postgre but after installing the required libraries and adding DBfactory connection string, I still do not see .NET data provider for PostgreSQL in my data connection dialogue.

1. Have you installed the Professional edition of dotConnect for PostgreSQL? You can check your current edition via the Tools > PostgreSQL > About menu of Visual Studio. Only Professional edition includes the Entity Framework support: http://www.devart.com/dotconnect/postgresql/editions.html .
2. Using Devart PgSqlExtendedMembership Provider in ASP.NET MVC 4 Application: http://www.devart.com/dotconnect/postgresql/docs/?ExtendedMembership-Tutorial.html .
3. If you have any questions about dotConnect for PostgreSQL, please contact us via http://www.devart.com/company/contactform.html .