public async Task <UserData> AddUserData(ParaboleModel model)
{
var userdata = db.UserData.Add(new UserData
{
RangeFrom = model.RangeFrom,
RangeTo = model.RangeTo,
step = model.step,
a = model.a,
b = model.b,
c = model.c
});
await db.SaveChangesAsync();
return(userdata);
}
public async Task <Dictionary <double, double> > Points(ParaboleModel model, UserData userdata)
{
Dictionary <double, double> points = new Dictionary <double, double>();
for (int i = model.RangeFrom; i <= model.RangeTo; i += model.step)
{
points
.Add(i, model.a * Math.Pow(i, 2) + model.b * i + model.c);
db.Points.Add(new Point
{
ChartId = userdata.UserDataId,
PointX = i,
PointY = model.a * Math.Pow(i, 2) + model.b * i + model.c
});
}
await db.SaveChangesAsync();
return(points);
}
public async Task <object> Parabola(ParaboleModel model)
{
if (ModelState.IsValid)
{
double disc = Math.Pow(model.b, 2) - (4 * model.a * model.c);
var userdata = await ChartService.AddUserData(model);
if (disc >= 0)
{
var points = await ChartService.Points(model, userdata);
return(points);
}
}
else
{
ModelState.AddModelError(string.Empty, "Введенные данные должны быть целыми числами");
return(ModelState);
}
return(null);
}
