C#•3mo ago

Cant get my list to work

Im trying to make a WPF application for movies, where i can look up a move, and get some info. But i cant get the JSON content into the page. I constanly get different errors, and i cant figger this one out anymore. Even AI's are give me all kinda solutions, but end up going in circle. This is my MovieViewModel.cs:

c#
private async void InitializeViewModel()
{
    var MovieURL = "https://xxxxx/page-1.json";
    var movieCollectionList = new List<MovieInfo>();

    using (HttpClient client = new HttpClient())
    {
        var response = await client.GetAsync(MovieURL);
        if (response.IsSuccessStatusCode)
        {
            var content = await response.Content.ReadAsStringAsync();
            var APIsearchResault = JsonConvert.DeserializeObject<dynamic>(content);

            try
            {
                if (APIsearchResault.Response!= null)
                {
                    foreach (var movie in APIsearchResault.Search)
                    {
                        Console.WriteLine(movie.Title);
                        movieCollectionList.Add(
                            new MovieInfo
                            {
                                Title = movie.Title,
                                TmdbId = movie.TmdbId,
                            }
                        );
                    }
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine($"{ex.Message}");
            }
        }
    }

    Movies = movieCollectionList;

    _isInitialized = true;
}

c#
private async void InitializeViewModel()
{
    var MovieURL = "https://xxxxx/page-1.json";
    var movieCollectionList = new List<MovieInfo>();

    using (HttpClient client = new HttpClient())
    {
        var response = await client.GetAsync(MovieURL);
        if (response.IsSuccessStatusCode)
        {
            var content = await response.Content.ReadAsStringAsync();
            var APIsearchResault = JsonConvert.DeserializeObject<dynamic>(content);

            try
            {
                if (APIsearchResault.Response!= null)
                {
                    foreach (var movie in APIsearchResault.Search)
                    {
                        Console.WriteLine(movie.Title);
                        movieCollectionList.Add(
                            new MovieInfo
                            {
                                Title = movie.Title,
                                TmdbId = movie.TmdbId,
                            }
                        );
                    }
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine($"{ex.Message}");
            }
        }
    }

    Movies = movieCollectionList;

    _isInitialized = true;
}

This is the JSON content:

{
  "result": [
    {
      "imdb_id": "tt9281138",
      "tmdb_id": "972423",
      "title": "A Million Days 2023",
    }, .....

{
  "result": [
    {
      "imdb_id": "tt9281138",
      "tmdb_id": "972423",
      "title": "A Million Days 2023",
    }, .....

But i keep getting error: System.NullReferenceException: 'Object reference not set to an instance of an object.' Im lost, need some help, plz

4 Replies

Saber•3mo ago

what makes you think APIsearchResault.Search is valid based on that json result

MONO•3mo ago

thougth it was valid since it had data, buuut, i can almost guess im wrong here Do you know how i can make the JSON work into my project, if its not valid?

Saber•3mo ago

where do you see a property called Search in that json object?

MONO•3mo ago

Oh sorry, mixed up the code. The search is in a list i made. <MovieSearchResaults>

c#
var APIsearchResault = JsonConvert.DeserializeObject<MovieSearchResult>(content);

c#
var APIsearchResault = JsonConvert.DeserializeObject<MovieSearchResult>(content);

That goes into my MovieModel:

c#
public class MovieSearchResult
{
    public List<MovieInfo> Search { get; set; }
    public string Response { get; set; }
    public string Error { get; set; }
}
public struct MovieInfo
{
    public string TmdbId { get; set; }
    public string Title { get; set; }
}

c#
public class MovieSearchResult
{
    public List<MovieInfo> Search { get; set; }
    public string Response { get; set; }
    public string Error { get; set; }
}
public struct MovieInfo
{
    public string TmdbId { get; set; }
    public string Title { get; set; }
}

Thats where i get the search.

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Cant get my list to work