TheMovieDB から API にアクセスし、次のような情報を含む JSON を取得しています。
この JSON をモデルのコレクションにデシリアライズしたいと考えています。次のように定義されたテレビ番組のインスタンスのモデルがあります。
class SeriesModel : BindableBase
{
public SeriesModel(){}
#region Properties
private string _backdropPath;
public string Backdrop_Path
{
get { return _backdropPath; }
set { this.SetProperty(ref this._backdropPath, value); }
}
private string _firstAirDate;
public string First_Air_Date
{
get { return _firstAirDate; }
set { this.SetProperty(ref this._firstAirDate, value); }
}
private int[] _genreIDs;
public int[] Genre_IDs
{
get { return _genreIDs; }
set { this.SetProperty(ref this._genreIDs, value); }
}
private int _id;
public int ID
{
get { return _id; }
set { this.SetProperty(ref this._id, value); }
}
private string _originalLanguage;
public string OriginalLanguage
{
get { return _originalLanguage; }
set { this.SetProperty(ref this._originalLanguage, value); }
}
private string _originalName;
public string Original_Name
{
get { return _originalName; }
set { this.SetProperty(ref this._originalName, value); }
}
private string _overview;
public string Overview
{
get { return _overview; }
set { this.SetProperty(ref this._overview, value); }
}
private string _originCountry;
public string Origin_Country
{
get { return _originCountry; }
set { this.SetProperty(ref this._originCountry, value); }
}
private string _posterPath;
public string Poster_Path
{
get { return _posterPath; }
set { this.SetProperty(ref this._posterPath, value); }
}
private string _popularity;
public string Popularity
{
get { return _popularity; }
set { this.SetProperty(ref this._popularity, value); }
}
private string _name;
public string Name
{
get { return _name; }
set { this.SetProperty(ref this._name, value); }
}
private string _voteAverage;
public string Vote_Average
{
get { return _voteAverage; }
set { this.SetProperty(ref this._voteAverage, value); }
}
private int _voteCount;
public int Vote_Count
{
get { return _voteCount; }
set { this.SetProperty(ref this._voteCount, value); }
}
#endregion
}
Newtonsoft JSON を使用して、次のコードで逆シリアル化しています。
public async static void GetPopularSeriesCollection()
{
ObservableCollection<SeriesModel> seriesCollection = new ObservableCollection<SeriesModel>();
var popularJson = await ApiHandler.GetPopularSeriesJSON();
seriesCollection = JsonConvert.DeserializeObject<ObservableCollection<SeriesModel>>(popularJson);
}
2 行目は、上の画像に表示されている json 文字列を返す次のメソッドを呼び出しています。
const string apiKey = "hidden";
static readonly Uri baseAddress = new Uri("http://api.themoviedb.org/3/");
static readonly HttpClient httpClient = new HttpClient { BaseAddress = baseAddress };
public static async Task<string> GetPopularSeriesJSON()
{
using (httpClient)
{
httpClient.DefaultRequestHeaders.TryAddWithoutValidation("accept", "application/json");
using (var response = await httpClient.GetAsync("tv/popular?api_key=" + apiKey))
return await response.Content.ReadAsStringAsync();
}
}
JsonConvert.DeserializeObject<... の行で次のエラーが発生します。
追加情報: 現在の JSON オブジェクト (例: {"name":"value"}) を型 'System.Collections.ObjectModel.ObservableCollection`1[ProjectSirV.Models.SeriesModel]' に逆シリアル化できません。型には JSON 配列が必要なためです (例: [1,2,3]) を正しく逆シリアル化します。このエラーを修正するには、JSON を JSON 配列 ([1,2,3] など) に変更するか、逆シリアル化された型を通常の .NET 型 (整数のようなプリミティブ型ではなく、コレクション型ではない) に変更します。 JSON オブジェクトから逆シリアル化できる配列またはリスト)。JsonObjectAttribute を型に追加して、強制的に JSON オブジェクトから逆シリアル化することもできます。
JSON API をいじるのはほぼ初めてで、自分のしていることが正しいかどうか完全にはわかりません。どんな助けでも大歓迎です。
編集: 要求された生の JSON 文字列
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Amidst the war, a neglected military order of misfits, the Night's Watch, is all that stands between the realms of men and icy horrors beyond.\n\n","origin_country":["US"],"poster_path":"/jIhL6mlT7AblhbHJgEoiBIOUVl1.jpg","popularity":28.002963,"name":"Game of Thrones","vote_average":9.0,"vote_count":285},{"backdrop_path":"/nGsNruW3W27V6r4gkyc3iiEGsKR.jpg","first_air_date":"2007-09-24","genre_ids":[35],"id":1418,"original_language":null,"original_name":"The Big Bang Theory","overview":"The Big Bang Theory is centered on five characters living in Pasadena, California: roommates Leonard Hofstadter and Sheldon Cooper; Penny, a waitress and aspiring actress who lives across the hall; and Leonard and Sheldon's equally geeky and socially awkward friends and co-workers, mechanical engineer Howard Wolowitz and astrophysicist Raj Koothrappali. 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