c#编码转换

       /// <summary>
        /// URL编码
        /// </summary>
        /// <param name="Source"></param>
        /// <param name="Encod">是否UTF8</param>
        /// <param name="toUpper">默认到大写</param>
        /// <returns></returns>
        public static string URLEncod(string Source, Encoding Encod, bool toUpper = true)
        {
            if (toUpper)
            {
                StringBuilder sb = new StringBuilder();
                for (int i = 0; i < Source.Length; i++)
                {
                    string t = Source[i].ToString();
                    string k = HttpUtility.UrlEncode(t, Encod);
                    if (t == k) sb.Append(t);
                    else sb.Append(k.ToUpper());
                }
                return sb.ToString();
            }
            else
                return HttpUtility.UrlEncode(Source, Encod);

        }
        /// <summary>
        /// URL解码
        /// </summary>
        /// <param name="Source"></param>
        /// <param name="Encod">是否UTF8</param>
        /// <returns></returns>
        public static string URLDecode(string Source, Encoding Encod)
        {

            return HttpUtility.UrlDecode(Source, Encod);
        }