Http Client请求调用接口

        /// <summary>
        /// Http Client请求
        /// </summary>
        /// <param name="url">api地址</param>
        /// <param name="dic">参数，这里用的是json格式</param>
        /// <returns></returns>
        public string CallApiByHttpClient<T>(string url, T param)
        {
            string result = "";
                HttpClient httpClient = new HttpClient();
                httpClient.MaxResponseContentBufferSize = 256000;
                httpClient.DefaultRequestHeaders.Add("user-agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.143 Safari/537.36");


                var requestJson = JsonConvert.SerializeObject(param);
                HttpContent httpContent = new StringContent(requestJson);
                httpContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");

                result = httpClient.PostAsync(url, httpContent)
                    .Result.Content.ReadAsStringAsync().Result;//post请求
                //result = httpClient.GetAsync(url).Result.Content.ReadAsStringAsync().Result;//get请求

 　　　　　　　　　//用完要记得释放

        }