public async Task Change(Major major)
{
if (major == null)
{
throw new Exception("Must enter a Major ID");
}
if (major.Id < 0)
{
throw new Exception("Major Id must be greater than ZERO");
}
_context.Entry(major).State = Microsoft.EntityFrameworkCore.EntityState.Modified;
var rowsAffected = await _context.SaveChangesAsync();
if (rowsAffected != 1)
{
throw new Exception("Change Failed");
}
return;
}
//// we are doing a create method here to use in programs
//public Student Create(Student student) {
// if(student == null) {
// throw new Exception("Student cannot be null!");
// }
// if(student.Id != 0) {
// throw new Exception("student.Id must be zero!");
// }
// _context.Students.Add(student);
// var rowsAffect = _context.SaveChanges();// it's important to remember to do SaveChanges
// if(rowsAffect != 1) {
// throw new Exception("Create failed!");
// }
// return student;
//}
// change does not need a return
// we also took out void where task used to be becasue it needs to be async
public async Task Change(Student student)
{
if (student == null)
{
throw new Exception("Student cannot be null!");
}
if (student.Id <= 0)
{
throw new Exception("student.Id must be greater than zero!");
}
_context.Entry(student).State = Microsoft.EntityFrameworkCore.EntityState.Modified; // we are telling entity to change the data here and to map it.
var rowsAffect = await _context.SaveChangesAsync(); // it's important to remember to do SaveChanges
if (rowsAffect != 1)
{
throw new Exception("Change failed!");
}
return;
}
public void change(Student student)
{
if (student == null)
{
throw new Exception("Student cannot be NULL");
}
if (student.Id <= 0)
{
throw new Exception("Student.Id must be greater than zero!");
}
_context.Entry(student).State = Microsoft.EntityFrameworkCore.EntityState.Modified;
var rowsAffected = _context.SaveChanges();
if (rowsAffected != 1)
{
throw new Exception("Change failed!");
}
return;
}
public void change(Major major)
{
if (major == null)
{
throw new Exception("Major cannot be NULL");
}
if (major.Id <= 0)
{
throw new Exception("Major.Id has to be greater than zero");
}
_context.Entry(major).State = Microsoft.EntityFrameworkCore.EntityState.Modified;
var rowsAffected = _context.SaveChanges();
if (rowsAffected != 1)
{
throw new Exception("Change Failed");
}
return;
}
public async Task Change(Student student)
{
if (student == null)
{
throw new Exception("Student cannot be null");
}
if (student.Id < 0)
{
throw new Exception("Student.Id must be greater than zero!");
}
_context.Entry(student).State = Microsoft.EntityFrameworkCore.EntityState.Modified; // this is the cache holder for the data from the database
var rowsAffected = await _context.SaveChangesAsync();
if (rowsAffected != 1)
{
throw new Exception("Change failed!");
}
return;
}