public async Task <IActionResult> OnPostAsync()
{
if (!ModelState.IsValid)
{
return(Page());
}
// USING VM MODEL
//var entry = _context.Add(new Student());
//entry.CurrentValues.SetValues(StudentVM);
//await _context.SaveChangesAsync();
//return RedirectToPage("./Index");
//USE THIS CODE TO PREVENT OVERPOSTING
var emptyStudent = new Student();
if (await TryUpdateModelAsync <Student>(
emptyStudent, "student",
s => s.FirstName, 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, 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.InstructorID == id);
if (await TryUpdateModelAsync <Instructor>(
instructorToUpdate,
"Instructor",
i => i.FirstName, i => i.LastName,
i => i.HireDate, i => i.OfficeAssignment))
{
if (String.IsNullOrWhiteSpace(
instructorToUpdate.OfficeAssignment?.Location))
{
instructorToUpdate.OfficeAssignment = null;
}
UpdateInstrcutorCourses(_context, selectedCourses, instructorToUpdate);
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
UpdateInstrcutorCourses(_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.StudentID == id);
if (student == null)
{
return(NotFound());
}
try
{
_context.Student.Remove(student);
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
catch (DbUpdateException)
{
//Log the error
return(RedirectToAction("/.Delete",
new { id, saveChangesError = true }));
}
}
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 department is null, Department has already been deleted by another user
if (departmentToUpdate == null)
{
return(HandleDeleteDepartment());
}
_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 deparment was deleted by another user.");
return(Page());
}
var dbValues = (Department)databaseEntry.ToObject();
await setDbErrorMessage(dbValues, clientValues, _context);
Department.RowVersion = (byte[])dbValues.RowVersion;
// To Clear the model error for the next post request.
ModelState.Remove("Department.RowVersion");
}
}
InstructorNameSL = new SelectList(_context.Instructors,
"DepartmentID", "FullName", departmentToUpdate.InstructorID);
return(Page());
}
public async Task <IActionResult> OnPostAsync()
{
if (!ModelState.IsValid)
{
return(Page());
}
_context.Departments.Add(Department);
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
public async Task <IActionResult> OnPostAsync(int id)
{
Instructor instructorToRemove = await _context.Instructors
.Include(i => i.CourseAssignments)
.SingleAsync(i => i.InstructorID == id);
var departments = await _context.Departments
.Where(d => d.InstructorID == id)
.ToListAsync();
departments.ForEach(d => d.InstructorID = null);
_context.Instructors.Remove(instructorToRemove);
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
public async Task <IActionResult> OnPostAsync(int id)
{
try
{
if (await _context.Departments.AnyAsync(
m => m.DepartmentID == id))
{
_context.Departments.Remove(Department);
await _context.SaveChangesAsync();
}
return(RedirectToPage("./Index"));
}
catch (DbUpdateConcurrencyException)
{
return(RedirectToPage("./Delete", new { concurrencyError = true, id = id }));
}
}
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.FirstName, s => s.LastName, s => s.EnrollmentDate))
{
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
return(Page());
}
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",
c => c.Credits, c => c.DepartmentID, c => c.Title))
{
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
PopulateDepartmentsDropDownList(_context, courseToUpdate.DepartmentID);
return(Page());
//_context.Attach(Course).State = EntityState.Modified;
//try
//{
// await _context.SaveChangesAsync();
//}
//catch (DbUpdateConcurrencyException)
//{
// if (!CourseExists(Course.CourseID))
// {
// return NotFound();
// }
// else
// {
// throw;
// }
//}
//return RedirectToPage("./Index");
}
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.FirstName, i => i.LastName,
i => i.HireDate, i => i.OfficeAssignment))
{
_context.Instructors.Add(newInstructor);
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
PopulateAssignedCourseData(_context, newInstructor);
return(Page());
}