private string ValidationForTeacher(Teacher teacher)
{
string message = "";
if (teacher.TeacherName == "")
{
message += "Teacher Name is not given";
}
if (teacher.TeacherAddress == "")
{
message += "Teacher Address is not given";
}
if (teacher.TeacherEmail == "")
{
message += "Teacher email is not given";
}
else
{
if (!IsMailAddressValid(teacher.TeacherEmail))
{
message += "Invalid email address given";
}
else
{
// there is case, story says email must be unique
// but it is not said that unique within the system or not
if (db.Teachers.Count(t => t.TeacherEmail == teacher.TeacherEmail) != 0)
{
message += "This email is already exists";
}
}
}
if (teacher.TeacherContactNo == "")
{
message += "Contact No. not given";
}
if (teacher.DesignationId < 0)
{
message += "Invalid Designation, choose correct designation";
}
if (teacher.DepartmentId < 0)
{
message += "Invalid Department, choose correct department";
}
if (teacher.TeacherCreditToBeTaken < 0)
{
message += "Credit to be taken must be non-negative number";
}
return message;
}
public ActionResult Create(Teacher teacher)
{
string message = ValidationForTeacher(teacher);
if (message != "")
{
ViewBag.DesignationId = new SelectList(db.Designations, "DesignationId", "DesignationName", teacher.DesignationId);
ViewBag.DepartmentId = new SelectList(db.Departments, "DepartmentId", "DepartmentCode", teacher.DepartmentId);
ViewBag.Message = message;
return View(teacher);
}
teacher.TeacherRemainingCredit = teacher.TeacherCreditToBeTaken;
if (ModelState.IsValid)
{
db.Teachers.Add(teacher);
db.SaveChanges();
return RedirectToAction("Index");
}
ViewBag.DesignationId = new SelectList(db.Designations, "DesignationId", "DesignationName", teacher.DesignationId);
ViewBag.DepartmentId = new SelectList(db.Departments, "DepartmentId", "DepartmentCode", teacher.DepartmentId);
return View(teacher);
}
public ActionResult CourseAssign(Department aDepartment, Course aCourse, Teacher aTeacher)
{
string message = ValidationForCourseAssign(aDepartment, aCourse, aTeacher);
if (message != "")
{
ViewBag.DepartmentId = new SelectList(db.Departments, "DepartmentId", "DepartmentName");
ViewBag.TeacherId = new SelectList("", "", "TeacherName");
ViewBag.CourseId = new SelectList("", "", "CourseName");
ViewBag.Message = message;
return View();
}
aTeacher = db.Teachers.Find(aTeacher.TeacherId);
aCourse = db.Courses.Find(aCourse.CourseId);
// assiging teacher to this course
aCourse.Teacher = aTeacher;
// update remaining credit for teacher
aTeacher.TeacherRemainingCredit -= aCourse.CourseCredit;
//save data to database
if (!ModelState.IsValid)
{
db.Entry(aCourse).State = EntityState.Modified;
db.SaveChanges();
db.Entry(aTeacher).State = EntityState.Modified;
db.SaveChanges();
return RedirectToAction("Index");
}
return View();
}
private string ValidationForCourseAssign(Department aDepartment, Course aCourse, Teacher aTeacher)
{
string message = "";
if (aDepartment.DepartmentId == 0 || aCourse.CourseId == 0 || aTeacher.TeacherId == 0)
{
message += "Incomplete form submit, any field is not yet set ";
}
// is teacher and course is not from the same department
aDepartment = db.Departments.Find(aDepartment.DepartmentId);
aTeacher = db.Teachers.Find(aTeacher.TeacherId);
aCourse = db.Courses.Find(aCourse.CourseId);
if (aDepartment.DepartmentId != aTeacher.DepartmentId || aCourse.DepartmentId != aTeacher.DepartmentId)
{
ViewBag.DepartmentId = new SelectList(db.Departments, "DepartmentId", "DepartmentName");
ViewBag.TeacherId = new SelectList(db.Teachers, "TeacherId", "TeacherName");
ViewBag.CourseId = new SelectList(db.Courses, "CourseId", "CourseName");
if (aDepartment.DepartmentId != aCourse.DepartmentId)
{
message += "Your Course is not from the selected department";
}
else if (aCourse.DepartmentId != aTeacher.DepartmentId)
{
message += "Your Teacher is not from the selected department";
}
}
// if course is already assigned
if (aCourse.Teacher != null)
{
message += "Course Already Assigned";
}
return message;
}