Deserializing Json Value to C# List<String>

Question

I'm having an issue with converting a one part of a JSON string to C# List. The original code didn't have the [JsonProperty] and it that's where the issue started. I added the [JsonProperty] to the MdId value, but the issue is still happens.

C# Class

public class PendingPatientDocumentRecord
{
    public int PatientDocumentFileMapId;
    public short ContextTypeId;
    public string PatientVisitId;
    public List<string> BillingIds;
    public DateTime? DateOfService;

    [JsonProperty("MdId")]
    public List<string> MdId;
}

Deserialization code

List<PendingPatientDocumentRecord> pendingDocuments = JsonConvert.DeserializeObject<List<PendingPatientDocumentRecord>>(pendingDocumentsJson);

JSON String:

[
  {
    "PatientDocumentFileMapId":12,
    "ContextTypeId":3,
    "DateOfService":"08/31/2022",
    "MdId":"ala"
  }
]

Error:

Error converting value "ala" to type System.Collections.Generic.List`1[System.String]'. Path '[0].MdId'

You json property is of string type, not an array, change the C# class accordingly. — Guru Stron
– Guru Stron, Commented Aug 31, 2022 at 18:03
Pleas re-read minimal reproducible example guidance on posting code and update question to show smaller version of code plus clarify what exactly you want to achieve - whether to read JSON as is or fix JSON to match your class or "read single value as an array". Also consider showing that none of the existing questions helped with that... — Alexei Levenkov
– Alexei Levenkov, Commented Aug 31, 2022 at 18:17
In your JSON, the value of "MdId" is a string not an array of strings: "MdId":"ala". Is the value always a single string, or is it sometimes a single string, and sometimes an array of strings? If "MdId" is sometimes an array but sometimes a single value, this question is a duplicate of How to handle both a single item and an array for the same property using JSON.net. — dbc
– dbc, Commented Aug 31, 2022 at 18:29

Jamie Ide · Accepted Answer · 2022-08-31 18:05:04Z

2

MdId needs to be an array so that it can be converted to a list. You don't need the JsonProperty attribute.

  {
    "PatientDocumentFileMapId": 12,
    "ContextTypeId": 3,
    "DateOfService": "08/31/2022",
    "MdId": ["ala"]
  }

answered Aug 31, 2022 at 18:05

Jamie Ide

49.4k18 gold badges85 silver badges118 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Deserializing Json Value to C# List<String>

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related