Simple JSON deserialization in C# fails, why?

Question

JSON

Hello.

I have this JSON string:

{"id":"3","companies_name":"{EQ\r\n"}
{"id":"6","companies_name":"testName Company"}
{"id":"7","companies_name":"testName Company324324"}
{"id":"8","companies_name":"testName Company"}
{"id":"9","companies_name":"testName Companydfgdfgf"}
{"id":"10","companies_name":"testName Company"}
{"id":"13","companies_name":"testName Company"}

I'm using Newtonsoft.Json, like this:

Companies restoredCompanies = JsonConvert.DeserializeObject<Companies>(result.message);

If JSON comes with 1 object, everything is OK, if there are several, then an error occurs:
"Additional text encountered after finished reading JSON content: {. Path '', line 1, position 37."

I understand the reason for the error, that I am trying to write several elements into 1 object, but I tried to do it like this:

List<Companies> restoredCompanies = JsonConvert.DeserializeObject<List<Companies>>(result.message);
// и так:

Companies[] restoredCompanies = JsonConvert.DeserializeObject<Companies[]>(result.message);

And here is the Companies class:

class Companies
    {
        public string id { get; set; }
        public string companies_name { get; set; }
    }

But something doesn't work.

I understand that the question is mega stupid and very simple, please do not judge)

PS Thank you all very much!

Answer 1

I have this JSON string:

Looks like an invalid json.
If you have a list, then it should be

[
  {"id":"3","companies_name":"{EQ\r\n"},
  {"id":"6","companies_name":"testName Company"},
  {"id":"7","companies_name":"testName Company324324"},
  {"id":"8","companies_name":"testName Company"},
  {"id":"9","companies_name":"testName Companydfgdfgf"},
  {"id":"10","companies_name":"testName Company"},
  {"id":"13","companies_name":"testName Company"}
]

Then you have to do
JsonConvert.Deserialize<Companies[]>(str)

class Company {
  [JsonProperty("id")]
  public string Id { get; set; }

  [JsonProperty("companies_name")]
  public string Name { get; set; }
}

UPD: if this is some kind of log stream, for example, then you can use this approach: https://stackoverflow.com/questions/48882653/deser...
But if these are not logs, then it's better to correct the format.

Answer 2

It can throw an error because it failed to deserialize exactly to the specified class.
I do not like code-first, and in general, de-realization into a class. I am parsing json into a dictionary of dictionaries.

System.Web.Script.Serialization.JavaScriptSerializer serializer = new System.Web.Script.Serialization.JavaScriptSerializer();
Dictionary<string, object> obj = (Dictionary<string, object>)serializer.DeserializeObject(***json***);

Answer 3

Take a json string (the most complete one) and run it through this service: https://www.jsonutils.com/
As a result, you will have a class that will take into account all the features.