.net core API sending array object

Question

I have student class with array StudentPhones. When i remove StudentPhones property from Student class is working perfectly when post with Postman. But when add StudentPhones property then Postman gives me this error:

{ "StudentPhones": [ "Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'DataAccess.StudentPhone' because the type requires a JSON object (e.g. {\"name\":\"value\"}) to deserialize correctly.\r\nTo fix this error either change the JSON to a JSON object (e.g. {\"name\":\"value\"}) or change the deserialized type to an array or a type that implements a collection interface (e.g. ICollection, IList) like List that can be deserialized from a JSON array. JsonArrayAttribute can also be added to the type to force it to deserialize from a JSON array.\r\nPath 'StudentPhones', line 4, position 23." ] }

 public class Student
 {
 public string StudentName { get; set; }
 public string StudentSurname { get; set; }
 public StudentPhone StudentPhones { get; set; }
 }
 public class StudentPhone
 {
 public int PhoneType{ get; set; }
 public string PhoneNumber { get; set; }
 }
 public async Task<ServiceResult> SaveStudent([FromBody]Student student)
 {
 }

How can I post this json? (I am using angular 6 in real, postman is only for example.)

my json

{
 "studentName": "test",
 "studentSurname": "test",
 "studentPhones": [
 {
 "phoneType": 1,
 "phoneNumber ": "111111111"
 },
 {
 "phoneType": 2,
 "phoneNumber ": "2222222222"
 }
 ],
}

• R. Richards: Why don't you have StudentPhones declared as an array, or List, of StudentPhone in the Student class?
• realist: It was careless of me :) . Thanks for your reply. I am so ashamed for this question
• R. Richards: That's okay! If you really want, you can delete the post. It will likely be closed and removed at some point because it was a simple mistake in the code.
• realist: I try delete the question but stackoverflow deny.

Answer 1

You have an array of phones in your JSON, so instead of public StudentPhone StudentPhones { get; set; } in your model, you should have public List<StudentPhone> StudentPhones { get; set; }

• Laura Landuyt: You should use a list of StudentPhones public List<StudentPhone> StudentPhones { get; set; }
• realist: It was careless of me :) . Thanks for your reply. I am so ashamed for this question
• spender: @HasanOzdemir Happens to all of us sometimes. I'll vote your question away.