protected void btn_savenewcourse_Click(object sender, EventArgs e)
        {
            var course = new EntityFrameworkProject.Courses();

            if (ddl_teachers.SelectedValue != "-1" && ddl_education.SelectedValue != "-1")
            {
                course.CourseName   = txtbox_newcourse.Text;
                course.Education_Id = int.Parse(ddl_education.SelectedValue);
                course.Grade        = "IG - MVG";
                course.Staff_Id     = int.Parse(ddl_teachers.SelectedValue);

                cc.InsertorUpdateCourse(course);
                Response.Redirect($"Course");
            }
        }
        public Courses CourseByID(int id)
        {
            Courses course = ctx.Courses.Where(x => x.Id == id).FirstOrDefault();

            return(course);
        }
 public void RemoveCourse(Courses course)
 {
     ctx.Courses.Attach(course);
     ctx.Courses.Remove(course);
     ctx.SaveChanges();
 }
 public void UpdateCourse(Courses course)
 {
     ctx.Entry(course).State = EntityState.Modified;
     ctx.SaveChanges();
 }
 public void InsertorUpdateCourse(Courses course)
 {
     ctx.Courses.Add(course);
     ctx.SaveChanges();
 }