Fetch POST ReactJs to Controller .Net Core

Question

I have problem in Fetch POST to controller, an showing error like {"errors":{"":["Unexpected character encountered while parsing number: W. Path '', line 1, position 6."]},"title":"One or more validation errors occurred.","status":400,"traceId":"0HLOGKVEBUTKL:00000007"}. When I debbug too, in my controller it's not passing to controller.

This what I POST to

I'm using ReactJs for client-side, and Net Core for server-side. Here my code snippet:

AddList.js

 fetch('api/SampleData/AddEmployee', {
   method: 'POST',
   headers: {
     'Accept': 'application/json; charset=utf-8',
     'Content-Type': 'application/json;charset=UTF-8'
   },
   body: data,
 }).then((response) => response.json())
 .then((responseJson) => {
   console.log('Success:', JSON.stringify(responseJson));
   this.props.history.push("/list-data");
 })
   .catch(error => console.error('Error:', error));

SampleDataController.cs

[HttpPost("[action]")]
public JsonResult AddEmployee(EmployeesViewModel employee)
{
}

starrup.cs

 app.UseMvc(routes =>
 {
   routes.MapRoute(
     name: "default",
     template: "{controller}/{action=Index}/{id?}");

   routes.MapRoute(
     name: "api",
     template: "api/{controller}/{action}/{id?}");
 });

can you try it without Content-Type. It worked for me when i was dealing with formdata — deathstroke
– deathstroke, Commented Jul 25, 2019 at 3:49
different error {"type":"https://tools.ietf.org/html/rfc7231#section-6.5.13","title":"Unsupported Media Type","status":415,"traceId":"0HLOGKVEBUTKP:00000008"} Unsupported Media Type @mkamranhamid — Stfvns
– Stfvns, Commented Jul 25, 2019 at 3:55
I've no idea about .net but by seeing your error I guess your target resource should be explicitly told what kind of data it should be receiving in body like this 'Content-Type': 'multipart/form-data' — deathstroke
– deathstroke, Commented Jul 25, 2019 at 4:02

Tony · Accepted Answer · 2019-07-25 08:30:58Z

3

You dont need this config

   routes.MapRoute(
     name: "api",
     template: "api/{controller}/{action}/{id?}");

Instead use routing in your controller like this

[Route("api/[controller]/[action]")]
public class YourController : Controller

answered Jul 25, 2019 at 8:30

Tony

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Metin · Accepted Answer · 2019-07-26 14:07:45Z

0

Instead of

body: data,

can you try this?

body: JSON.stringify(data),

answered Jul 26, 2019 at 14:07

Metin

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