How to send DELETE with JSON to the REST API using HttpClient

Question

I have to send a delete command to a REST API service with JSON content using the HttpClient class and can't make this working.

API call:

DELETE /xxx/current {  "authentication_token": "" } 

because I can't add any content into below statement:

HttpResponseMessage response = client.DeleteAsync(requestUri).Result; 

I know how to make this work with RestSharp:

var request = new RestRequest {     Resource = "/xxx/current",     Method = Method.DELETE,     RequestFormat = DataFormat.Json };  var jsonPayload = JsonConvert.SerializeObject(cancelDto, Formatting.Indented);  request.Parameters.Clear(); request.AddHeader("Content-type", "application/json"); request.AddHeader ("Accept", "application/json"); request.AddParameter ("application/json", jsonPayload, ParameterType.RequestBody);  var response = await client.ExecuteTaskAsync (request); 

but I have get it done without RestSharp.

Answer 1

Although it might be late to answer this question but I've faced a similar problem and the following code worked for me.

HttpRequestMessage request = new HttpRequestMessage {     Content = new StringContent("[YOUR JSON GOES HERE]", Encoding.UTF8, "application/json"),     Method = HttpMethod.Delete,     RequestUri = new Uri("[YOUR URL GOES HERE]") }; await httpClient.SendAsync(request); 

UPDATE on .NET 5

.NET 5 introduced JsonContent. Here is an extension method using JsonContent:

public static async Task<HttpResponseMessage> DeleteAsJsonAsync<TValue>(this HttpClient httpClient, string requestUri, TValue value) {     HttpRequestMessage request = new HttpRequestMessage     {         Content = JsonContent.Create(value),         Method = HttpMethod.Delete,         RequestUri = new Uri(requestUri, UriKind.Relative)     };     return await httpClient.SendAsync(request); } 

Answer 2

You can use these extension methods:

public static class HttpClientExtensions {     public static Task<HttpResponseMessage> DeleteAsJsonAsync<T>(this HttpClient httpClient, string requestUri, T data)         => httpClient.SendAsync(new HttpRequestMessage(HttpMethod.Delete, requestUri) { Content = Serialize(data) });      public static Task<HttpResponseMessage> DeleteAsJsonAsync<T>(this HttpClient httpClient, string requestUri, T data, CancellationToken cancellationToken)         => httpClient.SendAsync(new HttpRequestMessage(HttpMethod.Delete, requestUri) { Content = Serialize(data) }, cancellationToken);      public static Task<HttpResponseMessage> DeleteAsJsonAsync<T>(this HttpClient httpClient, Uri requestUri, T data)         => httpClient.SendAsync(new HttpRequestMessage(HttpMethod.Delete, requestUri) { Content = Serialize(data) });      public static Task<HttpResponseMessage> DeleteAsJsonAsync<T>(this HttpClient httpClient, Uri requestUri, T data, CancellationToken cancellationToken)         => httpClient.SendAsync(new HttpRequestMessage(HttpMethod.Delete, requestUri) { Content = Serialize(data) }, cancellationToken);      private static HttpContent Serialize(object data) => new StringContent(JsonConvert.SerializeObject(data), Encoding.UTF8, "application/json"); }