IEnumerator<KeyValuePair<string, string>> dem = parameters.GetEnumerator();

            while (dem.MoveNext())

            {

                string name = dem.Current.Key;

                string value = dem.Current.Value;

                // 忽略参数名或参数值为空的参数

                if (!string.IsNullOrEmpty(name) && !string.IsNullOrEmpty(value))

                {

                    if (hasParam)

                    {

                        postData.Append("&");

                    }

                    postData.Append(name);

                    postData.Append("=");

                    string encodedValue = HttpUtility.UrlEncode(value, Encoding.GetEncoding(charset));

                    postData.Append(encodedValue);

                    hasParam = true;

                }

            }

            return postData.ToString();

        }

        /// <summary>

        /// 组装普通文本请求参数(不带Encode)。

        /// </summary>

        /// <param name="parameters">Key-Value形式请求参数字典</param>

        /// <returns>URL编码后的请求数据</returns>

        public static string BuildQueryWithOutEncode(IDictionary<string, string> parameters)

        {

            StringBuilder postData = new StringBuilder();

            bool hasParam = false;