为什么我的 Web API 在发布到 Web API 时会收到空值？

Question

我的 Web API 在Httpclient PostAsJsonAsync 中接收到空值：

public static async Task<DefaultApiResponse<T>> PostList<T>(string url, string token, List<AddEventViewModel.Agenda> request)
    {
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("bearer", token);

        var content = JsonConvert.SerializeObject(request);

        var buffer = System.Text.Encoding.UTF8.GetBytes(content);
        var byteContent = new ByteArrayContent(buffer);
        byteContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");

        var httpResponse = await client.PostAsJsonAsync(url, byteContent);

        var defaultresponse = JsonConvert.DeserializeObject<DefaultApiResponse<T>>(await httpResponse.Content.ReadAsStringAsync());

        return defaultresponse;
    }

为什么？

Answer 1

我会尝试以 StringContent 对象的形式发布

var content = new StringContent(
                     JsonConvert.SerializeObject(request),
                     Encoding.UTF8,
                     "application/json");

defaultresponse = await client.PostAsync(url, content);