public async Task <IActionResult> OnPostAsync(int?id, string[] selectedCourses)
{
if (!ModelState.IsValid)
{
return(Page());
}
var instructorToUpdate = await _context.Instructors
.Include(i => i.OfficeAssignment)
.Include(i => i.CourseAssignments)
.ThenInclude(i => i.Course)
.FirstOrDefaultAsync(s => s.ID == id);
if (await TryUpdateModelAsync <Instructor>(
instructorToUpdate,
"Instructor",
i => i.FirstMidName, i => i.LastName,
i => i.HireDate, i => i.OfficeAssignment))
{
if (String.IsNullOrWhiteSpace(
instructorToUpdate.OfficeAssignment?.Location))
{
instructorToUpdate.OfficeAssignment = null;
}
UpdateInstructorCourses(_context, selectedCourses, instructorToUpdate);
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
UpdateInstructorCourses(_context, selectedCourses, instructorToUpdate);
PopulateAssignedCourseData(_context, instructorToUpdate);
return(Page());
}
public async Task <IActionResult> OnPostAsync(int?id)
{
if (id == null)
{
return(NotFound());
}
var student = await _context.Student
.AsNoTracking()
.FirstOrDefaultAsync(m => m.ID == id);
if (student == null)
{
return(NotFound());
}
try
{
_context.Student.Remove(student);
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
catch (DbUpdateException /* ex */)
{
//Log the error (uncomment ex variable name and write a log.)
return(RedirectToAction("./Delete",
new { id, saveChangesError = true }));
}
}
public async Task <IActionResult> OnPostAsync(int id)
{
Instructor instructor = await _context.Instructors
.Include(i => i.CourseAssignments)
.SingleAsync(i => i.ID == id);
var departments = await _context.Departments
.Where(d => d.InstructorID == id)
.ToListAsync();
departments.ForEach(d => d.InstructorID = null);
_context.Instructors.Remove(instructor);
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
public async Task <IActionResult> OnPostAsync(int?id)
{
if (id == null)
{
return(NotFound());
}
Course = await _context.Courses
.AsNoTracking()
.FirstOrDefaultAsync(m => m.CourseID == id);
if (Course != null)
{
_context.Courses.Remove(Course);
await _context.SaveChangesAsync();
}
return(RedirectToPage("./Index"));
}
public async Task <IActionResult> OnPostAsync(int?id)
{
if (!ModelState.IsValid)
{
return(Page());
}
var studentToUpdate = await _context.Student.FindAsync(id);
if (await TryUpdateModelAsync <Student>(
studentToUpdate,
"student",
s => s.FirstMidName, s => s.LastName, s => s.EnrollmentDate))
{
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
return(Page());
}
public async Task <IActionResult> OnPostAsync()
{
if (!ModelState.IsValid)
{
return(Page());
}
var emptyStudent = new Student();
if (await TryUpdateModelAsync <Student>(
emptyStudent,
"student", // Prefix for form value.
s => s.FirstMidName, s => s.LastName, s => s.EnrollmentDate))
{
_context.Student.Add(emptyStudent);
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
return(null);
}
public async Task <IActionResult> OnPostAsync(int?id)
{
if (!ModelState.IsValid)
{
return(Page());
}
var courseToUpdate = await _context.Courses.FindAsync(id);
if (await TryUpdateModelAsync <Course>(
courseToUpdate,
"course", // Prefix for form value.
c => c.Credits, c => c.DepartmentID, c => c.Title))
{
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
// Select DepartmentID if TryUpdateModelAsync fails.
PopulateDepartmentsDropDownList(_context, courseToUpdate.DepartmentID);
return(Page());
}
public async Task <IActionResult> OnPostAsync()
{
if (!ModelState.IsValid)
{
return(Page());
}
var emptyCourse = new Course();
if (await TryUpdateModelAsync <Course>(
emptyCourse,
"course", // Prefix for form value.
s => s.CourseID, s => s.DepartmentID, s => s.Title, s => s.Credits))
{
_context.Courses.Add(emptyCourse);
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
// Select DepartmentID if TryUpdateModelAsync fails.
PopulateDepartmentsDropDownList(_context, emptyCourse.DepartmentID);
return(Page());
}
public async Task <IActionResult> OnPostAsync(string[] selectedCourses)
{
if (!ModelState.IsValid)
{
return(Page());
}
var newInstructor = new Instructor();
if (selectedCourses != null)
{
newInstructor.CourseAssignments = new List <CourseAssignment>();
foreach (var course in selectedCourses)
{
var courseToAdd = new CourseAssignment
{
CourseID = int.Parse(course)
};
newInstructor.CourseAssignments.Add(courseToAdd);
}
}
if (await TryUpdateModelAsync <Instructor>(
newInstructor,
"Instructor",
i => i.FirstMidName, i => i.LastName,
i => i.HireDate, i => i.OfficeAssignment))
{
_context.Instructors.Add(newInstructor);
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
PopulateAssignedCourseData(_context, newInstructor);
return(Page());
}