C# convert IEnumerable to Array-CodePudding

I have this code :

private static List<ParticipantJson> GetListParticipants(string dossierJson)
{
  dynamic participantsJson = Newtonsoft.Json.JsonConvert.DeserializeObject<object>(dossierJson);
  IEnumerable<ParticipantJson>[] myList = participantsJson.Participants.ToString() as IEnumerable<ParticipantJson>[];
  var list = myList.ToList();
  return null;
}

the part of participantsJson.Participants.ToString() as IEnumerable<ParticipantJson>[]; in debugging mode shows the two json objects of the table Participants[0] and Participants1. as the next image. enter image description here

but the affectation IEnumerable[] myList is null.

How do i mess ?

CodePudding user response：

As mentioned using dynamic is not the best practice to deserialize json objects. Especially since .NET allows you to create classes that json can be mapped to.

public class ParticipantsJson
{
  public List<ParticipantJson> Participants { get; set; }
}

public class ParticipantJson
{
  public int DeltaParticipant { get; set; }
  //... remainder of JSON fields from JToken section in image
}

private static List<ParticipantJson> GetListParticipants(string dossierJson)
{
  var participantsJson = Newtonsoft.Json.JsonConvert.DeserializeObject<ParticipantsJson>(dossierJson);
  return participantsJson.Participants;
}

That said you can still use dynamic in your function.

private static List<ParticipantJson> GetListParticipants(string dossierJson)
{
  dynamic participantsJson = Newtonsoft.Json.JsonConvert.DeserializeObject<object>(dossierJson);

// this creates an array which to access you would need to loop through each object using a for loop.

var myList = new List<ParticipantJson>();

for(int i = 0; i < participantsJson.Count(); i  )
{
  var newParticipant = new ParticipantJson {
     DeltaParticipant = participantsJson[i].DeltaParticipant,
     //... remainder of JSON fields from JToken section in image
  };
  myList.add(newParticipant);
}

// or using foreach loop

foreach(var participant in participantsJson)
{
   var newParticipant = new ParticipantJson {
   DeltaParticipant = participant.DeltaParticipant,
     //... remainder of JSON fields from JToken section in image
   };
   myList.add(newParticipant);
}

  return myList;
}

CodePudding user response：

finally this code works for me.

private static List<ParticipantJson> GetListParticipants(string dossierJson)
{
  dynamic participantsJson = Newtonsoft.Json.JsonConvert.DeserializeObject<object>(dossierJson);
  Newtonsoft.Json.Linq.JArray myList = participantsJson.Participants;
  var jTokens = myList.Select(x => x.ToString()).ToArray();
  List<ParticipantJson> participants = new List<ParticipantJson>();
  foreach (var token in jTokens)
  {
    ParticipantJson _tmp = Newtonsoft.Json.JsonConvert.DeserializeObject<ParticipantJson>(token);
    participants.Add(_tmp);
  }
  return participants;
}

I fixed the issue.