RestSharp RestClient not working with ASP.NET Core [FromForm] - asp.net-core

Question

Hi I am writing integration test for my asp.net core project and i am trying to use RestSharp RestClient to send Form Data. My Code is working fine as i am getting the desired result if use postman but if i copy restsharp code from postman and try to implement in my test case its not reaching the controller. Following is my code
Postman -
Test Code -
[Test]
public void ConvertToJson_CSV()
{
var client = new RestClient("https://localhost:44355/GroupContacts/ConvertToJson");
client.Timeout = -1;
var request = new RestRequest(Method.POST);
//request.AddFile("files", #"C:\Users\RanaBoy\Desktop\ZTT\ZTTTestFiles\sample500.csv");
request.AddFile("files", System.IO.File.ReadAllBytes(#"C:\Users\RanaBoy\Desktop\ZTT\ZTTTestFiles\sample500.csv"), "sample500.csv");
request.AddParameter("optInStatus", "1");
request.AddParameter("SessionId", _SessionId);
request.AddParameter("AccountId", _AccountId);
request.AddHeader("cache-control", "no-cache");
request.AddHeader("Content-Type", "application/x-www-form-urlencoded");
request.AddHeader("content-type", "multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW");
request.AlwaysMultipartFormData = true;
IRestResponse response = client.Execute(request);
Console.WriteLine(response.Content);
//Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
}
Controller Code -
[HttpPost]
[Route("ConvertToJson")]
[Consumes("multipart/form-data")]
public async Task<IActionResult> ConvertToJson([FromForm] ConvertFileToJsonCommand command)
{
var result = await _mediator.Send(command);
return Ok(result.ResultJson);
}
Model Class -
public class ConvertFileToJsonCommand : IRequest<ConvertFileToJsonResponse>
{
public int AccountId { get; set; }
public string SessionId { get; set; }
public List<IFormFile> files { get; set; }
public int optInStatus { get; set; }
}

Answer 1

Postman doesn't generate the correct code for RestSharp. For example, your code sets the content-type header twice.
The following code should produce the correct request:
public async Task ConvertToJson_CSV()
{
var client = new RestClient("https://localhost:44355/GroupContacts/ConvertToJson");
var request = new RestRequest(Method.POST)
.AddFile("files", "sample500.csv", "C:\Users\RanaBoy\Desktop\ZTT\ZTTTestFiles\sample500.csv")
.AddParameter("optInStatus", "1")
.AddParameter("SessionId", _sessionId)
var response = await client.ExecuteAsync(request);
Console.WriteLine(response.Content);
//Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
}
Notice that the code uses RestSharp 107. If for some reason it won't work, you can check the difference between Postman request and RestSharp request using HttpTracer (check the docs).