Filter raise an exception

Question

public List<Video> filtra_data(string date)
            {
                List<Video> lista_filtrata = new List<Video>();
                for (int i = 0; i < listavideo.Count; i++)
                {
                    if (listavideo[i].Data.Contains(date) == true)
                        lista_filtrata.Add(listavideo[i]);
                }
                return lista_filtrata;
            }

i made this method to filter a list of movies using the date as parameter but when, on the form, i put the input in the textbox and i press the button it raises an exception on the for: object reference not set to an instance of an object, any ideas? thank you everyone

i've also made another method which is the same of this one, only changing parameter with title instead of date and it works — Fante, Jun 25 '15 at 07:53
i've declared listavideo and on the constructor i created it, on the form listavideo is a listbox which contains properties of a video (title date format resolution and size) — Fante, Jun 25 '15 at 08:05

score 2 · Answer 1 · answered Jun 25 '15 at 08:02

2

Try to trace your method,check listavideo first whether its fill from your data layer or not, secondly there is a better way to do so,

public List<Video> filtra_data(string date)
 {
    Return listavideo.Where(m=>m.Data.Contains(date)).ToList()
 }

answered Jun 25 '15 at 08:02

Behzad

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Filter raise an exception

1 Answers1