如何为Visual Studio 2012 MVC实体框架项目添加Oracle服务器？

Question

I have been trying to add an Oracle Server via Add Connection option provided in the Data Connections Section of Server Explorer. I have been using Oracle 10g Express Edition to connect to via Entity Framework. Whenever I pot for adding the server connection is throws up errors. What am I possibly missing ? I tried all the solutions I could find on net and here is what my connectionString looks like :

 <connectionStrings>
    <add name="OracleDbContext" providerName="Oracle.ManagedDataAccess.Client" connectionString="Data Source=(DESCRIPTION=
         (ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST= CHIRANJIB_VAIO)(PORT=1521)))
         (CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME= XE)));
        User Id=hr ;Password=hr" />
    <add name="DefaultConnection" connectionString="Data Source=(LocalDb)\v11.0;Initial Catalog=aspnet-MvcApplication4-20151115215423;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|\aspnet-MvcApplication4-20151115215423.mdf" providerName="System.Data.SqlClient" />
  </connectionStrings> 

Below are the screenshots of my attempts at it :

and ....

I tried 'XE' , 'localhost' etc. as the Server Names . But apparently nothing worked out.

Answer 1

Change the HOST = CHIRANJIB_VAIO to HOST = localhost if it's a local server, and check in your tnsnames.ora file to be sure that it's a DEDICATED server.

Also, have you installed the NuGet package ?

Answer 2

Starting with 10g clients, you can use the EZCONNECT feature, which does not require to edit the TNSNAMES.ORA file. For instance:

<add name="RagTools" connectionString="DATA SOURCE=localhost:1521/DEV;PASSWORD=***;PERSIST SECURITY INFO=True;USER ID=UserName" providerName="Oracle.ManagedDataAccess.Client" />