Asp.net MVC-4 project linkup with asp.net Web project using IIS How to manage database ?

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ASP.NET

Server Error in '/testmvc' Application.
Cannot open database "ClanderDB" requested by the login. The login failed.
Login failed for user 'IIS APPPOOL\ASP.NET v4.0'.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Data.SqlClient.SqlException: Cannot open database "ClanderDB" requested by the login. The login failed.
Login failed for user 'IIS APPPOOL\ASP.NET v4.0'.

Source Error:


Line 51: if (ModelState.IsValid)
Line 52: {
Line 53: db.Appointments.Add(appointment); ////error
Line 54: db.SaveChanges();
Line 55: return RedirectToAction("Index");


Source File: D:\Project\EventCale\EventCale\Controllers\AppointmentController.cs Line: 53

Stack Trace: