加载类动态获取属性值，其中一个是类

Question

首先，当然我已经搜索了大约两天，但如果可能的话，我无法让它工作。

这有点帮助： Get property value from C# dynamic object by string (reflection?) 还有这个： C# Iterate through Class properties

背景资料： 该类是使用来自 TMDB 的 JSON 字符串生成的。 API 密钥是免费的，因此如果您想查看原始 json，请获取密钥并使用它： https://api.themoviedb.org/3/tv/456?api_key=YOURKEY&append_to_response=season/1,season/2,season/3&language=en-US 我有 20 个赛季，但在这里缩短了。一次只允许 20 个。是的，我可以一次获得一个赛季并进行 27 次 api 调用，但 2 次更好。获得一季效果很好，不需要任何帮助。

这是使用VS2015特殊粘贴生成的json类的一部分，并做了一些调整：

namespace TvDb.Tv
{
class MultiSeasons
{      
 
    public Season[] seasons { get; set; }    
    public Season1 season1 { get; set; }
    public Season2 season2 { get; set; }
    public Season3 season3 { get; set; }

    //and so on
}

public class Season1 : CommonProperties { }
public class Season2 : CommonProperties { }
public class Season3 : CommonProperties { }

//and so on

public class CommonProperties
{
    public string _id { get; set; }
    public string air_date { get; set; }
    public Episode[] episodes { get; set; }
    public string name { get; set; }
    public string overview { get; set; }
    public string poster_path { get; set; }
    public int season_number { get; set; }
}

public class Season
{
    public string air_date { get; set; }
    public int episode_count { get; set; }
    public int id { get; set; }
    public string name { get; set; }
    public string overview { get; set; }
    public string poster_path { get; set; }
    public int season_number { get; set; }
}

public class Episode
{
    public string air_date { get; set; }
    public int episode_number { get; set; }
    public int id { get; set; }
    public string name { get; set; }
    public string overview { get; set; }
    public string production_code { get; set; }
    public int season_number { get; set; }
    public string still_path { get; set; }
    public float vote_average { get; set; }
    public int vote_count { get; set; }
}

}

我可以通过反序列化 json 获得所需的信息，但可以看出，我知道动态获取类可以更好地编写。我只是似乎找不到方法....

        string json = "It's stored in a file for testing";
        //the json from TMDB returns wrong to name or find classes
        //such as season/1, season/2, etc.
        json = json.Replace("season/", "season");

        MultiSeasons ser = JsonConvert.DeserializeObject<MultiSeasons>(json);

        DataTable dt = new DataTable();
        //columns added here


        //int numOfSeasons = ser.number_of_seasons;

        //Type type = Type.GetType("TvDb.Tv.Series, TvDb");
        string str = "TvDb.Tv.Season1" + ", " + "TvDb";

        //dynamic d = 
        Type type = Type.GetType(str);

        string st = "";
        if (type != null)
        {
            var cls = Utilities.Classes.PropertyReader.getProperties(type);
            //PropertyReader site https://answers.unity.com/questions/1092425/how-to-get-a-list-of-variables-in-a-class.html


            for (int i = 0; i < cls.Length; i++)
            {

                if(cls[i].name == "episodes")
                {
                    //Episode e = 
                }

                var nameOfProperty = cls[i].name;
                var propertyInfo = cls.GetType().GetProperty(nameOfProperty);
                var value = propertyInfo.GetValue(cls, null);


                //st += cls.GetType().GetProperty(cls[i].name).GetValue(cls, null);
                //st += cls[i].name.ToString() + Environment.NewLine;
               
            }
        }

        DataRow dr;           

        //write 50 seperate foreach statements? I don't think so !!!!!!!!

        if (ser.season1 != null)
        {
            foreach (var r in ser.season1.episodes)
            {
                dr = dt.NewRow();
                dr["id"] = ser.id;
                dr["firstAired"] = r.air_date;
                dr["season"] = r.season_number;
                //and so on                    
                dt.Rows.Add(dr);
            }
        }

        if (ser.season2 != null)
        {
            foreach (var r in ser.season2.episodes)
            {
                dr = dt.NewRow();
                dr["id"] = ser.id;
                dr["firstAired"] = r.air_date;
                dr["season"] = r.season_number;
                //and so on
                dt.Rows.Add(dr);
            }
        }

感谢任何输入或将我指向我错过的帖子。

编辑：对于那些想看json的人，我找到了一个可以查看的地方......

https://codebeautify.org/online-json-editor/cbaebcbd

Answer 1

这将完成工作 - 如果某些事情没有按预期工作，请随时提供反馈。

我首先想使用 JsonPath 查询来查找匹配的子级 - 但它似乎不支持属性名称的通配符。至少我没有找到任何文档。

因此，我们遍历所有子属性以找到以“season/”开头的那些 - 从性能的角度来看，这应该没问题，因为 JsonPath 可能会做同样的事情，并且对于少量的数据它并不重要无论如何，一个现代系统。

    static IReadOnlyList<SeasonDetails> GetSeasons(string json)
    {
        List<SeasonDetails> seasons = new List<SeasonDetails>();
        JObject jObject = JObject.Parse(json);
        foreach (var child in jObject.Children<JProperty>())
        {
            if (!child.Name.StartsWith("season/"))
            {
                continue;
            }

            seasons.Add(child.Value.ToObject<SeasonDetails>());
        }

        return seasons;
    }

    public class SeasonDetails
    {
        public string _id { get; set; }
        public string air_date { get; set; }
        public Episode[] episodes { get; set; }
        public string name { get; set; }
        public string overview { get; set; }
        public string poster_path { get; set; }
        public int season_number { get; set; }
    }

    public class Episode
    {
        public string air_date { get; set; }
        public int episode_number { get; set; }
        public int id { get; set; }
        public string name { get; set; }
        public string overview { get; set; }
        public string production_code { get; set; }
        public int season_number { get; set; }
        public string still_path { get; set; }
        public float vote_average { get; set; }
        public int vote_count { get; set; }
    }

之后，您可以通过遍历季节列表来执行您的逻辑：

foreach(SeasonDetails season in seasons) {
 // Fill your datatable.
}