How to pass empty string to nullable int

Question

I have this property

public int? CodigoBanco { get; set; }

An when i try to send it to server in this way

codigoBanco: ""

I have the following error

The following errors were detected during validation:\r\n - The JSON value could not be converted to System.Nullable`1[System.Int32]

Answer 1

You have two ways to resolve the problem:

1. Specify null (not empty string) and it will be successfully mapped. codigoBanco: null or remove this property at all from client-side(the default will be the same null)

2. Write custom convertaion at backend-side, something like:

   CodigoBanco = int.Parse(codigoBanco == "" || codigoBanco.Length = 0 ? null : codigoBanco);