C＃Api调用HttpClient异常“此实例已启动一个或多个请求” [重复]

Question

此问题已经在这里有了答案：

Httpclient This instance has already started one or more requests. Properties can only be modified before sending the first request（2个答案）

关闭上个月。

我已经使用HttpClient调用API，但给我一个错误，例如“此实例已经启动了一个或多个请求。只能在发送第一个请求之前修改属性。”

下面是我的代码

public async Task<Result<T>> Get<T>(Token token, string route)
        {
            var result = new Result<T>();
            try
            {
                _httpClient.Timeout = new TimeSpan(0, 0, GlobalLogic.SessionTimeOut);

                var response = await _httpClient.GetAsync(GlobalConstant.ApiUrl + route, token);
                token.ThrowIfCancellationRequested();
                string content = await response.Content.ReadAsStringAsync().ConfigureAwait(false);
                if (response.IsSuccessStatusCode)
                {
                    result.Data = JsonConvert.DeserializeObject<T>(content);
                }
                else
                {
                    Error error = new Error();
                    error.error_description = content;
                    error.Code = (int)response.StatusCode;
                    if (response.StatusCode==System.Net.HttpStatusCode.Unauthorized)
                    {
                        error.Code = (int)System.Net.HttpStatusCode.Unauthorized;
                    }
                    result.error = error;
                }
            }
            catch (Exception ex)
            {
                var message = ex.Message;
            }
            return result;
        }

Answer 1

我发现此解决方案使用不使用本地HTTP客户端对象或每次创建一个全局HTTP客户端对象。

创建HttpClient的本地对象，并在您的类或构造函数中使用它。

public HttpClient _httpClient = new HttpClient { BaseAddress = new Uri(ApiUrl) };;