float predrating(int movieid, user userid)
{
int k = 1;
float predracting = 0.0f;
float sumpredracting = 0.0f;
rateduserlist userwhowatchthismovie = ratedmovielist.Where(r => r.Movieid == movieid).First();
int co = 0;
int simi = 0;
foreach (userpm id in userwhowatchthismovie.Userid)
{
user userothermovies;
if (listusers.Where(r => r.Userid == id.Userid).Count() != 0)
{
userothermovies = listusers.Where(r => r.Userid == id.Userid).FirstOrDefault();
foreach (Rated r in userothermovies.Moviewatched)
{
if (userid.Moviewatched.Where(ka => ka.Movieid == r.Movieid).Count() != 0)
{
Rated rk = userid.Moviewatched.Where(ka => ka.Movieid == r.Movieid).First();
simi++;
sumpredracting = sumpredracting + (r.Rate + rk.Rate) / 2;
co++;
if (k == simi)
{
break;
}
}
}
}
}
predracting = sumpredracting / co;
return(predracting);
}
private void Load()
{
using (var reader = new StreamReader(configs.nonsorted))
{
rateduserlist m = new rateduserlist();
int Movieidte = 0;
while (!reader.EndOfStream)
{
var line = reader.ReadLine();
var values = line.Split(',');
int Movieid = Int32.Parse(values[0]);
if (Movieidte != Movieid)
{
ratedmovielist.Add(m);
m = new rateduserlist();
m.Movieid = Int32.Parse(values[0]);
m.Userid = new List <userpm>();
Movieidte = Movieid;
}
else
{
userpm r = new userpm();
r.Userid = Int32.Parse(values[1]);
r.Rate = float.Parse(values[2]);
m.Userid.Add(r);
}
}
ratedmovielist.RemoveAt(0);
}
int pi = 0;
using (var reader = new StreamReader(configs.movielist))
{
pi++;
while (!reader.EndOfStream)
{
var line = reader.ReadLine();
var values = line.Split(',');
movilist m = new movilist();
m.Id = Int32.Parse(values[0]);
if (ratedmovielist.Where(r => r.Movieid == m.Id).Count() != 0)
{
try
{
m.Year = Int32.Parse(values[1]);
}
catch (Exception ex)
{ m.Year = 0; }
m.Title = (values[2]);
listMovies.Add(m);
}
}
}
listBox1.Items.Clear();
foreach (movilist m in listMovies)
{
listBox1.Items.Add(m.Title + " , " + m.Year);
}
listBox1.Invalidate();
using (var reader = new StreamReader(configs.userdb))
{
int userid = 0;
List <string> sl = new List <string>();
user m = new user();
pi = 0;
while (!reader.EndOfStream)
{
pi++;
var line = reader.ReadLine();
var values = line.Split(',');
int useridte = Int32.Parse(values[1]);
if (useridte != userid)
{
listusers.Add(m);
m = new user(); m.Userid = Int32.Parse(values[1]); m.Moviewatched = new List <Rated>();
userid = useridte;
}
else
{
Rated r = new Rated();
r.Movieid = Int32.Parse(values[0]);
r.Rate = float.Parse(values[2]);
m.Moviewatched.Add(r);
}
}
listusers.RemoveAt(0);
}
listBox2.Items.Clear();
foreach (user m in listusers)
{
listBox2.Items.Add(m.Userid);
}
}