The database and model in DB layer
I tried many things but nothing work or I do something wrong
I am a beginner so I need more information what should I do or how can I create project with different layers what I want to do (UI(View+Controller), BLL, DAL, DB (database + DBModel))
<connectionStrings> <add name="MvcDBApplicationEntities" connectionString="metadata=res://*/DBMvcModel.csdl|res://*/DBMvcModel.ssdl|res://*/DBMvcModel.msl;provider=System.Data.SqlClient;provider connection string="data source=(LocalDB)\v11.0;attachdbfilename=|DataDirectory|\MvcDBApplication.mdf;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework"" providerName="System.Data.EntityClient" /> </connectionStrings>
This is the full error
An attempt to attach an auto-named database for file c:\users\hazem\documents\visual studio 2013\Projects\MvcApplication\MvcApplication\App_Data\MvcDBApplication.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.
Structure or the project