public static void CreateDatabase()
{
using var dbContext = new HelloEfDbContext();
dbContext.Database.EnsureDeleted();
dbContext.Database.EnsureCreated();
dbContext.Courses.Add(new Course
{
Teacher = new Teacher
{
FirstName = "Alireza",
LastNAme = "Oroumand"
},
Titile = "Pro ASP.NET Core 5"
});
dbContext.Courses.Add(new Course
{
Teacher = new Teacher
{
FirstName = "Mohammad",
LastNAme = "Abbasi"
},
Titile = "Linux For Developers"
});
dbContext.SaveChanges();
}
public static void UpdateCourse(int courseId)
{
using var dbContext = new HelloEfDbContext();
var course = dbContext.Courses.Include(c => c.Teacher).FirstOrDefault(c => c.CourseId == courseId);
course.Titile = $"{course.Titile} {DateTime.Now.Ticks}";
course.Teacher.FirstName = $"{course.Teacher.FirstName} {DateTime.Now.Ticks}";
dbContext.SaveChanges();
System.Console.ReadLine();
}
public static void ReadAllData()
{
using var dbContext = new HelloEfDbContext();
var query = dbContext.Courses.Include(c => c.Teacher).AsNoTracking();
var queryString = query.ToQueryString();
System.Console.WriteLine(queryString);
System.Console.WriteLine();
foreach (var item in query.ToList())
{
System.Console.WriteLine($"{item.CourseId}: {item.Titile} -- {item.Teacher.FirstName} {item.Teacher.LastNAme}");
}
System.Console.ReadLine();
}