C#DataTable2Json(附时间格式化)

/// <summary>
        /// 将datatable转换为json  
        /// </summary>
        /// <param name="dtb">Dt</param>
        /// <returns>JSON字符串</returns>
        public string Dtb2Json(DataTable dtb)
        {
            JavaScriptSerializer jss = new JavaScriptSerializer();
            System.Collections.ArrayList dic = new System.Collections.ArrayList();
            foreach (DataRow dr in dtb.Rows)
            {
                System.Collections.Generic.Dictionary<string, object> drow = new System.Collections.Generic.Dictionary<string, object>();
                foreach (DataColumn dc in dtb.Columns)
                {
                    drow.Add(dc.ColumnName, dr[dc.ColumnName]);
                }
                dic.Add(drow);

            }
            //序列化  
            string jsonStr= jss.Serialize(dic);
            jsonStr = System.Text.RegularExpressions.Regex.Replace(jsonStr, @"\/Date((d+))\/", match =>
            {
                DateTime dt = new DateTime(1970, 1, 1);
                dt = dt.AddMilliseconds(long.Parse(match.Groups[1].Value));
                dt = dt.ToLocalTime();
                return dt.ToString("yyyy-MM-dd HH:mm:ss");
            });
            return jsonStr;
        }