public static void Initialize(CourseContext context)
{
context.Database.EnsureCreated();
// Look for any students.
if (context.Courses.Any())
{
return; // DB has been seeded
}
var courses = new CourseDescription[]
{
new CourseDescription {
Description = "Coding class 1"
},
new CourseDescription {
Description = "Another coding class 2"
},
new CourseDescription {
Description = "Another coding class 3"
},
new CourseDescription {
Description = "Another coding class 4"
},
new CourseDescription {
Description = "Another coding class 5"
}
};
foreach (CourseDescription c in courses)
{
context.Description.Add(c);
}
context.SaveChanges();
var coursesList = new CourseInstance[]
{
new CourseInstance {
ID = 1, Dept = "Computer Science", Number = 1410, Semester = "Fall", Year = 2019, Description = courses[1]
},
new CourseInstance {
ID = 2, Dept = "Computer Science", Number = 2420, Semester = "Fall", Year = 2019, Description = courses[1]
},
new CourseInstance {
ID = 3, Dept = "Computer Science", Number = 2420, Semester = "Spring", Year = 2020, Description = courses[1]
},
new CourseInstance {
ID = 4, Dept = "Computer Science", Number = 3500, Semester = "Fall", Year = 2019, Description = courses[3]
},
new CourseInstance {
ID = 5, Dept = "Computer Science", Number = 3505, Semester = "Fall", Year = 2019, Description = courses[3]
},
};
foreach (CourseInstance s in coursesList)
{
context.Courses.Add(s);
}
context.SaveChanges();
}
public async Task <IActionResult> Edit(int id, [Bind("DescriptionId,Description")] CourseDescription courseDescription)
{
if (id != courseDescription.Id)
{
return(NotFound());
}
if (ModelState.IsValid)
{
try
{
_context.Update(courseDescription);
await _context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
if (!CourseDescriptionExists(courseDescription.Id))
{
return(NotFound());
}
else
{
throw;
}
}
return(RedirectToAction(nameof(Index)));
}
return(View(courseDescription));
}
protected override void OnModelCreating(ModelBuilder builder)
{
base.OnModelCreating(builder);
CourseDescription.OnModelCreating(builder);
Request.OnModelCreating(builder);
}
public async Task <IActionResult> Create([Bind("DescriptionId,Description")] CourseDescription courseDescription)
{
if (ModelState.IsValid)
{
_context.Add(courseDescription);
await _context.SaveChangesAsync();
return(RedirectToAction(nameof(Index)));
}
return(View(courseDescription));
}
public IEnumerable <ValidationResult> Validate(ValidationContext validationContext)
{
// Validation 1: Credits have to be between 1-4
if (CourseCredits < 1 || CourseCredits > 4)
{
yield return(new ValidationResult("Credits must be between 1 and 4."));
}
// Validation 2:
if (CourseDescription.Split(' ').Length > 100)
{
yield return(new ValidationResult("Your description is too verbose."));
}
}
public IEnumerable <ValidationResult> Validate(ValidationContext validationContext)
{
// validation for credits 1-4
if (CourseCredits < 1 || CourseCredits > 4)
{
yield return(new ValidationResult("Credits must be between 1 and 4"));
}
//validation for description being too long
if (CourseDescription.Split(' ').Length > 100)
{
yield return(new ValidationResult("Your description is too verbose"));
}
}
public IEnumerable <ValidationResult> Validate(ValidationContext validationContext)
{
int maxCourseCredits = 4;
int maxWords = 5;
//validation 1 - Credits has to be 1-4
if (int.Parse(CourseCredits) > maxCourseCredits)
{
//error
yield return(new ValidationResult("Course Credits must be between 1 and 4", new[] { "Credits" }));
}
//validation 2 - Description cannot exceed 5 words
if (CourseDescription.Split(' ').Length > maxWords)
{
//error
yield return(new ValidationResult("Course Descritpion is too wordy!", new[] { "Description" }));
}
}
