how to post complex array to mvc c# api

Question

I'm trying to post an array tat one of it's members (th) is an array of strings, I stringify the array, here is hob it looks stringified:

[{"id":"201669887","name":"אורה","Sunday":"1","Monday":"1","Tuesday":"1","Wednesday":"0","Thursday":"1","Friday":"1","Sunday1":"1","Monday1":"1","Tuesday1":"1","Wednesday1":"0","Thursday1":"1","Friday1":"0","totalWorkHour":9,"th":["","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","",""],"year":" ","schoolName":null,"schoolNumber":null},{"id":"201669887","name":"חנה","Sunday":"1","Monday":"1","Tuesday":"1","Wednesday":"0","Thursday":"1","Friday":"1","Sunday1":"1","Monday1":"1","Tuesday1":"1","Wednesday1":"0","Thursday1":"1","Friday1":"0","totalWorkHour":9,"th":["","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","",""]

I have a model in Mvc:

public class teachersExcelDataModel
    {

  .....
    public int Thursday1 { get; set; }
    public int Friday1 { get; set; }
    public int totalWorkHour { get; set; }

     public List<string> th { get; set; }

     public string schoolName { get; set; }
    public int schoolNumber { get; set; }
    public string month { get; set; }
    public string year { get; set; }

        public teachersExcelDataModel()
        {
            th = new List<string>();
        }

    }

here is how i send it:

this.http.post(this.accessPointUrl3, JSON.stringify(this.sendData), { headers: this.headers }).subscribe(
  noteRecord => {
    if (noteRecord)
      this.a = true;
  }
);

and here is how I get it:

 public void PostExportExcel([FromBody]List<teachersExcelDataModel>json)

but it comes null, if i get it as object[], it;s okay, where am i wrong?

remove JSON.stringify

Amir Jelo
– Amir Jelo

2019-12-09 08:56:53 +00:00
Commented Dec 9, 2019 at 8:56 — Amir Jelo
– Amir Jelo, Commented Dec 9, 2019 at 8:56
so the count is 0 instead of null,

אסתר
– אסתר

2019-12-09 09:24:24 +00:00
Commented Dec 9, 2019 at 9:24 — אסתר
– אסתר, Commented Dec 9, 2019 at 9:24

Antoan Elenkov · Accepted Answer · 2019-12-09 09:25:54Z

1

Your example JSON string is not in correct format.
After fixing the format of the json, you will see that you are trying to parse schoolNumber field to integer, which in your case is null and I guess internally the framework throws exception.
Trying to parse the data to object[] does not require parsing null to integer, so now you know why it works in this case

answered Dec 9, 2019 at 9:25

Antoan Elenkov

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Comments

Owenc · Accepted Answer · 2019-12-09 09:01:18Z

0

the json format is incorrect based on what i can see from the question. missing "}" and "]" too.

answered Dec 9, 2019 at 9:01

Owenc

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2 Comments

אסתר Over a year ago

so what can i do? how can I stringify it in other way?

אסתר Over a year ago

this is the entire json: "[{"id":"201669887","name":"אורה","Sunday":"1","Monday":"1","Tuesday":"1","Wednesday":"0","Thursday":"1","Friday":"1","Sunday1":"1","Monday1":"1","Tuesday1":"1","Wednesday1":"0","Thursday1":"1","Friday1":"0","totalWorkHour":9,"th":["","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","",""],"year":" ","schoolName":null,"schoolNumber":null},{......(shortened)........,"totalWorkHour":9,"th":["","","","","","","","","","","","","","","","","","","","","","",,"","","","","","",""],"year":" ","schoolName":null,"schoolNumber":null}]"

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