C# JSON 转List<T>类

来源：互联网发布：win10 软件桌面图标编辑：程序博客网时间：2024/05/16 17:08
因为项目需要，形成一个JSON帮助类
这是在.net3.5的环境下编写
除了要添加引用
System.Runtime.Serialization;
还要添加
System.ServiceModel
System.ServiceModel.Web
public class JsonHelper {        /// <summary>        /// 把Json转成List<T>        /// </summary>        /// <typeparam name="T"></typeparam>        /// <param name="html"></param>        /// <returns></returns>        public static IList<T> JsonToList<T>(string html) {            IList<T> result = new List<T>();            html = FormatJson(html);            try {                DataContractJsonSerializer _Json = new DataContractJsonSerializer(result.GetType());                byte[] _Using = System.Text.Encoding.UTF8.GetBytes(html);                System.IO.MemoryStream _MemoryStream = new System.IO.MemoryStream(_Using);                _MemoryStream.Position = 0;                object obj = _Json.ReadObject(_MemoryStream); ;                result = (IList<T>)obj;            }            catch (Exception) {                html = AttributeToVariable(html);                DataContractJsonSerializer _Json = new DataContractJsonSerializer(result.GetType());                byte[] _Using = System.Text.Encoding.UTF8.GetBytes(html);                System.IO.MemoryStream _MemoryStream = new System.IO.MemoryStream(_Using);                _MemoryStream.Position = 0;                object obj = _Json.ReadObject(_MemoryStream); ;                result = (IList<T>)obj;            }            return result;        }        #region // 格式化Json字符串        /// <summary>        /// 格式化Json字符串，使之能转换成List        /// </summary>        /// <param name="html"></param>        /// <returns></returns>        public static string FormatJson(string value) {            string p = @"(new Date)\(+([0-9,-]+)+(\))";            MatchEvaluator matchEvaluator = new MatchEvaluator(FormatJsonMatch);            Regex reg = new Regex(p);            bool isfind = reg.IsMatch(value);            value = reg.Replace(value, matchEvaluator);            return value;        }        /// <summary>        /// 将Json序列化的时间由new Date(1373387734703)转为字符串"\/Date(1373387734703)\/"        /// </summary>        private static string FormatJsonMatch(Match m) {            return string.Format("\"\\/Date({0})\\/\"", m.Groups[2].Value);        }        #endregion // 格式化Json字符串        #region // 格式化日期        /// <summary>        /// 将Json序列化的时间由new Date(1373390933250) 或Date(1373390933250)或"\/Date(1373390933250+0800)\/"        /// 转为2013-07-09 17:28:53        /// 主要用于传给前台        /// </summary>        /// <param name="html"></param>        /// <returns></returns>        public static string FormatJsonDate(string value) {            string p = @"(new Date)\(+([0-9,-]+)+(\))";            MatchEvaluator matchEvaluator = new MatchEvaluator(FormatJsonDateMatch);            Regex reg = new Regex(p);            value = reg.Replace(value, matchEvaluator);            p = @"(Date)\(+([0-9,-]+)+(\))";            matchEvaluator = new MatchEvaluator(FormatJsonDateMatch);            reg = new Regex(p);            value = reg.Replace(value, matchEvaluator);            p = "\"\\\\\\/" + @"Date(\()([0-9,-]+)([+])([0-9,-]+)(\))" + "\\\\\\/\"";            matchEvaluator = new MatchEvaluator(FormatJsonDateMatch);            reg = new Regex(p);            value = reg.Replace(value, matchEvaluator);            return value;        }        /// <summary>        /// 将Json序列化的时间由Date(1294499956278+0800)转为字符串        /// </summary>        private static string FormatJsonDateMatch(Match m) {            string result = string.Empty;            DateTime dt = new DateTime(1970, 1, 1);            dt = dt.AddMilliseconds(long.Parse(m.Groups[2].Value));            dt = dt.ToLocalTime();            result = dt.ToString("yyyy-MM-dd HH:mm:ss");            return result;        }        #endregion // 格式化日期        #region // 属性和变量转换        /// <summary>        /// 属性转变量        /// 把"<address>k__BackingField":"1",        /// 转成"address":"1",        /// </summary>        /// <param name="value"></param>        /// <returns></returns>        public static string AttributeToVariable(string value) {            string p = @"\<([A-Z,a-z,0-9,_]*)\>k__BackingField";            MatchEvaluator matchEvaluator = new MatchEvaluator(AttributeToVariableMatch);            Regex reg = new Regex(p);            bool isfind = reg.IsMatch(value);            value = reg.Replace(value, matchEvaluator);            return value;        }        private static string AttributeToVariableMatch(Match m) {            return m.Groups[1].Value;        }        /// <summary>        /// 变量转属性        /// 把"address":"1",        /// 转成"<address>k__BackingField":"1",        /// </summary>        /// <param name="value"></param>        /// <returns></returns>        public static string VariableToAttribute(string value) {            string p = "\\\"([A-Z,a-z,0-9,_]*)\\\"\\:";            MatchEvaluator matchEvaluator = new MatchEvaluator(VariableToAttributeMatch);            Regex reg = new Regex(p);            bool isfind = reg.IsMatch(value);            value = reg.Replace(value, matchEvaluator);            return value;        }        private static string VariableToAttributeMatch(Match m) {            return string.Format("\"<{0}>k__BackingField\":", m.Groups[1].Value);        }        #endregion // 属性和变量转换    }