Entity Framework Code First to a New Database

1. Create the Application

To keep things simple we’re going to build a basic console application that uses Code First to perform data access.

• Open Visual Studio
• File -> New -> Project…
• Select Windows from the left menu and Console Application
• Enter CodeFirstNewDatabaseSample as the name
• Select OK

2. Create the Model

    public class Department
    {
        [Key]
        public int DepartmentID { get; set; }
        public int CourseID { get; set; }
        [ForeignKey("CourseID")]
        public Course Course { get; set; }
        public string Name { get; set; }
    }

3. Create a Context

• Project –> Manage NuGet Packages… Note: If you don’t have the Manage NuGet Packages… option you should install the latest version of NuGet
• Select the Online tab
• Select the EntityFramework package
• Click Install

    public class QxunDbContext : DbContext
    {
        public QxunDbContext()
            : base("server=localhost;uid=sa;pwd=6665508a;database=Qxun;")
        {
        }
        public DbSet<Department> Departments { get; set; }
    }

4. Reading & Writing Data

 using (var db = new BloggingContext())
        {
            // Create and save a new Blog
            Console.Write("Enter a name for a new Blog: ");
            var name = Console.ReadLine(); 

            var blog = new Blog { Name = name };
            db.Blogs.Add(blog);
            db.SaveChanges(); 

            // Display all Blogs from the database
            var query = from b in db.Blogs
                        orderby b.Name
                        select b; 

            Console.WriteLine("All blogs in the database:");
            foreach (var item in query)
            {
                Console.WriteLine(item.Name);
            } 

            Console.WriteLine("Press any key to exit...");
            Console.ReadKey();
        }