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I am learning how to use RestSharp to make my web api calls. When l make a get request with Postman it returns 200 and in the body it gives me null instead of json and when l make a post request with Postman it returns a 204(no content).
All suggestions are welcomed. Thanks.

What I have tried:

Here is my product class with the set and get mehtods:

public class Product
 {
  public string ProductName { get; set; }
  public string ProductPrice { get; set; }
  public string Manufacturer { get; set; }
  public string Shop { get; set; }
   }


Here is my products controller class:

  public class ProductsController : ApiController
   {
      Product[] p = new Product[]
       {
       new  Product { ProductName = "JIM", Manufacturer = "Kofi",  ProductPrice = "22", Shop = "12"}
       };



// GET: api/Products/5
public IEnumerable<product> GetAll()
{
    var client = new RestClient("http://localhost:4282/");
    var request = new RestRequest("api/products", Method.GET) { RequestFormat = DataFormat.Json };
    var response = client.Execute<List<product>>(request);

    }

// POST: api/Products
public void Post([FromBody] Product p)
  {
    var client = new RestClient("http://localhost:4282/");
    var request = new RestRequest("api/products", Method.POST);
    request.RequestFormat = DataFormat.Json;
    request.AddJsonBody(p);
    client.Execute(request);
      }
Posted
Updated 15-Aug-18 3:46am
v2

1 solution

I haven't used RestSharp before but here's my take:

First off, your code doesn't make sense. You're creating a Web API endpoint and your are calling/consuming the same endpoint within the endpoint implementation. As I've understand after googling, RestSharp is a REST Http Client. This means that you build Web APIs separately and use RestSharp within your .NET code to consume them. Here's a good article that demonstrates what I am talking about: ASP.NET Web API, RestSharp and Model Error Messages | DotNetCurry[^]

Second, verify that you set the content-type to application/json in Postman configuration.

third, your Get end-point doesn't have a return that's why you are getting null. You should have something like:

C#
public IEnumerable<product> GetAll()
{
    var client = new RestClient("http://localhost:4282/");
    var request = new RestRequest("api/products", Method.GET) { RequestFormat = DataFormat.Json };
    var response = client.Execute<List<product>>(request);

    if (response.Data == null)  
          throw new Exception(response.ErrorMessage);  
  
     return response.Data;  
}


fourth, your Post endpoint is void, thus it is returning 204(No Nontent). You can return an IHttpActionResult something like:

C#
public IHttpActionResult Post([FromBody] Product p)
{
    var client = new RestClient("http://localhost:4282/");
    var request = new RestRequest("api/products", Method.POST);
    request.RequestFormat = DataFormat.Json;
    request.AddJsonBody(p);
    return Ok(client.Execute(request));
}


and finally, when designing a REST API with Web API, I'd suggest to give this short article a read: ASP.NET Core and Web API: A Custom Wrapper for Managing Exceptions and Consistent Responses[^]
   
v2

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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