Question

如何用C# .NEt开发基于http的接口，只支持post方式传参，除webservice以外，谁能给个例子，万分感谢！

Answer 1

private static readonly string DefaultUserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";
        /// <summary>  
        /// 创建POST方式的<a href="https://www.baidu.com/s?wd=HTTP%E8%AF%B7%E6%B1%82&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1d9uWRzuH7-uHb4PHmsPy7b0ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6KdThsqpZwYTjCEQLGCpyw9Uz4Bmy-bIi4WUvYETgN-TLwGUv3EPjcYPHnvrjR1PjcvPHn1njbz" target="_blank" class="baidu-highlight">HTTP请求</a>  
        /// </summary>  
        /// <param name="url">请求的URL</param>  
        /// <param name="parameters">随同请求POST的参数名称及参数值字典</param>  
        /// <param name="timeout">请求的超时时间</param>  
        /// <returns></returns>  
        public static string PostHttpResponse(string url, Dictionary<string, string> parameters,
            int? timeout)
        {
            try
            {
                if (string.IsNullOrEmpty(url))
                {
                    throw new ArgumentNullException("url");
                }
                HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
                request.ServicePoint.Expect100Continue = false;
                request.ServicePoint.UseNagleAlgorithm = false; //是否使用 Nagle 不使用 提高效率
                //request.AllowWriteStreamBuffering = false; //数据是否缓冲 false 提高效率
                request.Method = "POST";
                request.ContentType = "application/x-www-form-urlencoded";
                request.UserAgent = DefaultUserAgent;
                if (timeout.HasValue)
                {
                    request.Timeout = timeout.Value;
                }
                else
                {
                    request.Timeout = 20000;
                }
                Encoding requestEncoding = Encoding.GetEncoding("UTF-8");
                //如果需要POST数据  
                if (!(parameters == null || parameters.Count == 0))
                {
                     
                    StringBuilder buffer = new StringBuilder();
                    int i = 0;
                    foreach (string key in parameters.Keys)
                    {
                        if (i > 0)
                        {
                            buffer.AppendFormat("&{0}={1}", key, parameters[key]);
                        }
                        else
                        {
                            buffer.AppendFormat("{0}={1}", key, parameters[key]);
                        }
                        i++;
                    }
                    byte[] data = requestEncoding.GetBytes(buffer.ToString());
                    using (Stream stream = request.GetRequestStream())
                    {
                        stream.Write(data, 0, data.Length);
                    }
                }
 
                //获取响应，并设置响应编码
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                string encoding = response.ContentEncoding;
                if (encoding == null || encoding.Length < 1)
                {
                    encoding = "UTF-8"; //默认编码
                }
                //读取响应流
                StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding(encoding));
                string returnData = reader.ReadToEnd();
                reader.Dispose();
                response.Close();
                return returnData;
            }
            catch (Exception ex)
            {
                MessageUtil.ShowWarning(ex.Message);
            }
            return "";
        }