Resource not found 404 error ( WCF Data service hosted with MVC ASP.NET)

Scenario: MVC ASP.NET application containing WCF data services. When you try to browse WCF data service .svc page you might get the error
"Resource not found -404 error" .

Reson for such behavior : When you try to browse to data service page , the request is sent to MVC framework first rather than data service . As the controller is not defined for such request , error is send back.

Resolution :Ignore request redirection to MVC framework when WCF data service is requested .In order to achieve this add following to global.asax RegisterRoute function.

routes.IgnoreRoute("{resource}.svc/{*pathInfo}");

An entity object cannot be referenced by multiple instances of IEntityChangeTracker.

I got this error due to using separate context object for an entity. I had to use same context object to perform multiple operations in Entity .

Specified named connection is either not found in the configuration, not intended to be used with the EntityClient provider

I got this error when i was trying to browse the WCF data Services. The resolution for this issue was to define the connection string for database defined in in app.config file to the web.config file of the web application.

In Nutshell , below is my scnerio :

Project 1 : Contains the .edmx and app.config file

Project 2 : Contains the .SVC referencing entity model defined in project 1 and web.config file

Resolution :

Copy the Db connection defined in app.config to web.config under configuration section .