public async Task <IActionResult> OnPostAsync(int?id)
{
if (id == null)
{
return(NotFound());
}
Instructor instructorToDelete = await _context.Instructors
.Include(i => i.CourseAssignments) // need this otherwise the course assignments will not be deleted after instructor is
.SingleAsync(m => m.ID == id);
if (instructorToDelete == null)
{
return(RedirectToPage("./Index"));
}
var departments = await _context.Departments
.Where(d => d.InstructorID == id)
.ToListAsync();
departments.ForEach(d => d.InstructorID = null);
_context.Instructors.Remove(instructorToDelete);
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
public async Task <IActionResult> OnPostAsync(int?id)
{
if (id == null)
{
return(NotFound());
}
var student = await _context.Students.FindAsync(id);
if (student == null)
{
return(NotFound());
}
try
{
_context.Students.Remove(student);
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
catch (DbUpdateException /* ex */)
{
return(RedirectToAction("./Delete",
new { id, saveChangesError = true }));
}
//if (Student != null)
//{
// _context.Students.Remove(Student);
// await _context.SaveChangesAsync();
//}
//
//return RedirectToPage("./Index");
}
public async Task <IActionResult> OnPostAsync(int id)
{
if (!ModelState.IsValid)
{
return(Page());
}
var departmentToUpdate = await _context.Departments
.Include(i => i.Administrator)
.FirstOrDefaultAsync(m => m.DepartmentID == id);
if (departmentToUpdate == null)
{
return(HandleDeletedDepartment());
}
_context.Entry(departmentToUpdate)
.Property("RowVersion").OriginalValue = Department.RowVersion;
if (await TryUpdateModelAsync <Department>(
departmentToUpdate,
"Department",
s => s.Name, s => s.StartDate, s => s.Budget, s => s.InstructorID))
{
try
{
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
catch (DbUpdateConcurrencyException ex)
{
var exceptionEntry = ex.Entries.Single();
var clientValues = (Department)exceptionEntry.Entity;
var databaseEntry = exceptionEntry.GetDatabaseValues();
if (databaseEntry == null)
{
ModelState.AddModelError(string.Empty, "Unable to save. " +
"The department was deleted by another user.");
return(Page());
}
var dbValues = (Department)databaseEntry.ToObject();
await setDbErrorMessage(dbValues, clientValues, _context);
// Save the current RowVersion so next postback
// matches unless an new concurrency issue happens.
Department.RowVersion = (byte[])dbValues.RowVersion;
// Clear the model error for the next postback.
ModelState.Remove("Department.RowVersion");
}
}
InstructorNameSL = new SelectList(_context.Instructors,
"ID", "FullName", departmentToUpdate.InstructorID);
return(Page());
}
// To protect from overposting attacks, please enable the specific properties you want to bind to, for
// more details see https://aka.ms/RazorPagesCRUD.
public async Task <IActionResult> OnPostAsync()
{
if (!ModelState.IsValid)
{
return(Page());
}
_context.Departments.Add(Department);
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
// To protect from overposting attacks, please enable the specific properties you want to bind to, for
// more details see https://aka.ms/RazorPagesCRUD.
public async Task <IActionResult> OnPostAsync(int?id)
{
if (id == null)
{
return(NotFound());
}
var courseToUpdate = await _context.Courses.FindAsync(id);
if (courseToUpdate == null)
{
return(NotFound());
}
if (await TryUpdateModelAsync <Course>(
courseToUpdate,
"course",
c => c.DepartmentID, c => c.Credits, c => c.Title))
{
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
// Select DepartmentID if update fails
PopulateDepartmentsDropDownList(_context, courseToUpdate.DepartmentID);
return(Page());
//if (!ModelState.IsValid)
//{
// return Page();
//}
//_context.Attach(Course).State = EntityState.Modified;
//try
//{
// await _context.SaveChangesAsync();
//}
//catch (DbUpdateConcurrencyException)
//{
// if (!CourseExists(Course.CourseID))
// {
// return NotFound();
// }
// else
// {
// throw;
// }
//}
}
public async Task <IActionResult> OnPostAsync(int?id)
{
if (id == null)
{
return(NotFound());
}
Course = await _context.Courses.FindAsync(id);
if (Course != null)
{
_context.Courses.Remove(Course);
await _context.SaveChangesAsync();
}
return(RedirectToPage("./Index"));
}
// To protect from overposting attacks, please enable the specific properties you want to bind to, for
// more details see https://aka.ms/RazorPagesCRUD.
public async Task <IActionResult> OnPostAsync(int id)
{
var studentToUpdate = await _context.Students.FindAsync(id);
if (studentToUpdate == null)
{
return(NotFound());
}
if (await TryUpdateModelAsync <Student>(studentToUpdate, "student",
s => s.FirstMidName, s => s.LastName, s => s.EnrollmentDate))
{
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
return(Page());
//if (!ModelState.IsValid)
//{
// return Page();
//}
//_context.Attach(Student).State = EntityState.Modified;
//try
//{
// await _context.SaveChangesAsync();
//}
//catch (DbUpdateConcurrencyException)
//{
// if (!StudentExists(Student.ID))
// {
// return NotFound();
// }
// else
// {
// throw;
// }
//}
//return RedirectToPage("./Index");
}
// To protect from overposting attacks, please enable the specific properties you want to bind to, for
// more details see https://aka.ms/RazorPagesCRUD.
public async Task <IActionResult> OnPostAsync()
{
//if (!ModelState.IsValid)
//{
// return Page();
//}
var newCourse = new Course();
if (await TryUpdateModelAsync <Course>(
newCourse,
"course",
s => s.CourseID, s => s.DepartmentID, s => s.Title, s => s.Credits))
{
_context.Courses.Add(newCourse);
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
// Select DepartmentID if TryUpdateModelAsync fails
PopulateDepartmentsDropDownList(_context, newCourse.CourseID);
return(Page());
}
