Question

I’m using EntityFramework(EF) with Asp.Net for creating one website, In that I’ve Created the .edmx and .tt and DBContext.

Also I’ve done Get all records by using this method in my repo class,

    StudentManagementEntities _db;
    public Repo()
    {
        _db = new StudentManagementEntities();
    }

    public object GetAllStudents()
    {
        return _db.People.Select(s => s).ToList();
    }

I don’t know how to do other operations like Insert, Update, delete etc.,

would somebody tell me the linq for that or else give me any examples link…

Answer 1

Add, Update and Delete Objects in Entity Framework 4.0

// Insert

public void AddStudent(People s)
{
    _db.People.Add(s);
    _db.SaveChanges();
}

// Delete

public void DeleteStudent(People s)
{
    _db.People.Remove(s);
    _db.SaveChanges();
}

//Edit

public void EditStudent(People s)
{
    var people = _db.People.First( p=> p.ID == s.ID); // Replace ID with primary key

  // Copy all properties from s to people

    _db.SaveChanges();
}