C# httpClient.PostAsync时出现问题Result =“ {尚未计算}”

返回错误1：Id = 3129, Status = WaitingForActivation, Method = "{null}", Result = "{Not yet computed}"

返回错误2：发生了一个或多个错误

One or more errors occurred. at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions) at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification) at System.Threading.Tasks.Task`1.get_Result()

try
            {
                using (HttpClient httpClient = new HttpClient())
                {
                    var splitArray = formData.Split(new char[] { '&' });
                    var request = new HttpRequestMessage(HttpMethod.Post, url);

                    request.Headers.Add("Authorization", apiToken);
                    var mfdc = new MultipartFormDataContent();
                    mfdc.Headers.Add("ContentType", "multipart/form-data");//声明头部
                    foreach (var item in splitArray)
                    {
                        var inContext = item.Split(new char[] { '=' });
                        if (inContext.Length >= 2)
                        {
                            mfdc.Add(new StringContent(inContext[inContext.Length - 1]), inContext[0]);// 内容在前,参数名称在后
                        }
                    }
                    request.Content = mfdc;
                    var response = httpClient.SendAsync(request).Result;
                    if (response != null)
                    {
                        HttpResponseMessage msg = response.EnsureSuccessStatusCode();
                        HttpStatusCode code = response.StatusCode;
                        if (response.IsSuccessStatusCode)
                        {
                            result = response.Content.ReadAsStringAsync().Result;
                        }

                    }
                }
            }
            catch(Exception ex)
            {

            }

解决方案：因为url是https的原因：新增https协议支持

ServicePointManager.Expect100Continue = true;

 ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;

public static string HttpsAsyncTPFormDataPost(string url, string apiToken, string formData)
        {
            string result = string.Empty;
            try
            {
                using (HttpClient httpClient = new HttpClient())
                {
                    var splitArray = formData.Split(new char[] { '&' });
                    if (!string.IsNullOrEmpty(url) && url.Contains("https"))
                    {
                        ServicePointManager.Expect100Continue = true;
                        ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;
                    }
                    var request = new HttpRequestMessage(HttpMethod.Post, url);

                    request.Headers.Add("Authorization", apiToken);
                    var mfdc = new MultipartFormDataContent();
                    mfdc.Headers.Add("ContentType", "multipart/form-data");//声明头部
                    foreach (var item in splitArray)
                    {
                        var inContext = item.Split(new char[] { '=' });
                        if (inContext.Length >= 2)
                        {
                            mfdc.Add(new StringContent(inContext[inContext.Length - 1]), inContext[0]);// 内容在前,参数名称在后
                        }
                    }
                    request.Content = mfdc;
                    var response = httpClient.SendAsync(request).Result;
                    if (response != null)
                    {
                        HttpResponseMessage msg = response.EnsureSuccessStatusCode();
                        HttpStatusCode code = response.StatusCode;
                        if (response.IsSuccessStatusCode)
                        {
                            result = response.Content.ReadAsStringAsync().Result;
                        }

                    }
                }
            }
            catch(Exception ex)
            {

            }
            return result;
        }

参考地址：https://www.ab62.cn/article/31018.html

https://www.itguest.com/post/bfjcbf1a2.html

https://www.jb51.net/program/2879763nb.htm

https://qa.1r1g.com/sf/ask/1817519861/