I currently have a web app created with ASP.NET MVC 5, which is working with a database already created. At this point I would like to use Identity to create forms and user management to the page, the problem is that I do not know how to make the configuration from start to a page that is already created without losing all the work done. If someone who has had my same problem could help me, I would really appreciate it.
In the end I managed to solve the problem, it's all a matter of writing the connectionString correctly in Web.config .
By default it comes as follows:
<add name="DefaultConnection" connectionString="Data Source=(LocalDb)\MSSQLLocalDB;AttachDbFilename=|DataDirectory|\aspnet-WebApplication1-20180725105224.mdf;Initial Catalog=aspnet-WebApplication1-20180725105224;Integrated Security=True" providerName="System.Data.SqlClient" />
In this case I replaced it with the form that has the connectionString that creates EntityFramework Code First, which is very similar to this:
<add name="DefaultConnection" connectionString="data source=TuServidorBD;initial catalog=TuBD;integrated security=True;connect timeout=30;encrypt=False;trustservercertificate=False;applicationintent=ReadWrite;multisubnetfailover=False;MultipleActiveResultSets=True;App=EntityFramework" providerName="System.Data.SqlClient" />
I hope it's helpful