JSON格式序列化与反序列化(List、XML)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Runtime.Serialization.Json;
using System.Xml.Serialization;
using System.Web.Script.Serialization;


namespace Common
{
    public class JsonHelper
    {
        /// <summary>
        /// 序列化
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static string GetJson<T>(T obj)
        {
            if (obj == null) return null;
            DataContractJsonSerializer json = new DataContractJsonSerializer(obj.GetType());
            using (MemoryStream stream = new MemoryStream())
            {
                json.WriteObject(stream, obj);
                return Encoding.UTF8.GetString(stream.ToArray(), 0, stream.ToArray().Length);
            }
        }

        /// <summary>
        /// 反序列化
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="szJson"></param>
        /// <returns></returns>
        public static T ParseFromJson<T>(string szJson)
        {
            if (string.IsNullOrEmpty(szJson))
                return default(T);
　　　　　　　//xml内容乱码可正确转换 using (var ms = JsonReaderWriterFactory.CreateJsonReader(Encoding.UTF8.GetBytes(szJson), XmlDictionaryReaderQuotas.Max))
            using (var ms = new MemoryStream(Encoding.UTF8.GetBytes(szJson)))
            {
                var serializer = new DataContractJsonSerializer(typeof(T));
                return (T)serializer.ReadObject(ms);
            }
        }

        /// <summary>
        ///  对未知或匿名对象进行Json序列化。
        /// </summary>
        /// <param name="value"></param>
        /// <returns></returns>
        public static string GetUnknownJson(object value)
        {
            if (value == null) return null;
            return new JavaScriptSerializer().Serialize(value); 
        }
        /// <summary>
        /// DataContractJson序列化，用于序列化里面附带未知类型的实体。
        /// </summary>
        /// <param name="value"></param>
        /// <param name="knownTypes">知道类型</param>
        /// <returns></returns>
        public static string GetJson(object value, IEnumerable<Type> knownTypes)
        {
            if (value == null) return null;
            using (var ms = new MemoryStream())
            {
                new DataContractJsonSerializer(value.GetType(), knownTypes).WriteObject(ms, value);
                return Encoding.UTF8.GetString(ms.ToArray());
            }
        }


        #region 序列化文件和反序列化

        /// <summary>
        /// 通用类的保存函数，可以将已经声明过可序列化的类以文件方式保存起来。
        /// 保存格式分为 XML明文式和 二进制。
        /// 如果目标目录不存在，就自动创建目录。
        /// </summary>
        /// <typeparam name="T">要保存的类的类型</typeparam>
        /// <param name="tclass">要保存的类</param>
        /// <param name="sFilePath">要保存的文件完整路径，包括文件名。</param>
        /// <param name="bXmlOrBin">true=XML，false=Bin</param>
        /// <exception cref="System.Exception"></exception>
        public void Save<T>(T tclass, string sFilePath, bool bXmlOrBin)
        {
            //目录检查
            string sFolder = sFilePath.Substring(0, sFilePath.LastIndexOf("\"));
            if (!Directory.Exists(sFolder)) Directory.CreateDirectory(sFolder);

            using (FileStream fs = new FileStream(sFilePath, FileMode.Create, FileAccess.Write))
            {
                if (bXmlOrBin)
                {
                    using (MemoryStream stream = Serialize<T>(tclass, bXmlOrBin))
                    {
                        stream.WriteTo(fs);
                        stream.Close();
                    }
                }
                else
                {
                    System.Runtime.Serialization.Formatters.Binary.BinaryFormatter bf = null;
                    bf = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
                    bf.Serialize(fs, bXmlOrBin);
                }
                fs.Close();
            }
        }

        /// <summary>
        /// 从文件加载保存的信息，然后反序列化并返回保存的信息。
        /// 如果要读取的文件不存在会引发异常。
        /// </summary>
        /// <typeparam name="T">类型</typeparam>
        /// <param name="tclass">要返回的类，失败返回默认</param>
        /// <param name="sFilePath">文件路径</param>
        /// <param name="bXmlOrBin">true=XML，false=Bin</param>
        /// <exception cref="System.Exception"></exception>
        /// <exception cref="System.IO.IOException">文件不存在</exception>
        public void Load<T>(out T tclass, string sFilePath, bool bXmlOrBin)
        {
            if (!File.Exists(sFilePath))
            {
                tclass = default(T);
                return;
                //throw new IOException("要访问的文件不存在。");
            }
            using (FileStream fs = new FileStream(sFilePath, FileMode.Open, FileAccess.Read))
            {
                tclass = Deserialize<T>(fs, bXmlOrBin);
                fs.Close();
            }
        }

        /// <summary>
        /// 将传入的某个模型序列化，并返回其数据量，用于保存到文件里面。
        /// 提供序列化到XML或二进制。
        /// </summary>
        /// <typeparam name="T">类的类型</typeparam>
        /// <param name="model">要序列化的模型</param>
        /// <param name="bXmlOrBin">true=xml序列化，false=二进制序列化</param>
        /// <returns></returns>
        /// <exception cref="System.Exception"></exception>
        public MemoryStream Serialize<T>(T model, bool bXmlOrBin = true)
        {
            MemoryStream stream = new MemoryStream();
            if (bXmlOrBin)
            {
                XmlSerializer serializer = new XmlSerializer(typeof(T));
                serializer.Serialize(stream, model);
            }
            else
            {
                var bf = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
                bf.Serialize(stream, model);
            }
            stream.Position = 0;
            return stream;
        }

        /// <summary>
        /// 将传入的数据量进行反序列化。
        /// </summary>
        /// <typeparam name="T">类的类型</typeparam>
        /// <param name="stream">要反序列化的流</param>
        /// <param name="bXmlOrBin">true=xml序列化，false=二进制序列化</param>
        /// <returns></returns>
        public T Deserialize<T>(Stream stream, bool bXmlOrBin = true)
        {
            T model = default(T);
            using (var newstream = stream)
            {
                if (bXmlOrBin)
                {
                    XmlSerializer serializer = new XmlSerializer(typeof(T));
                    //暂时没做什么处理，以后有日志文件，就直接添加进入
                    serializer.UnknownNode += new XmlNodeEventHandler(serializer_UnknownNode);
                    serializer.UnknownAttribute += new XmlAttributeEventHandler(serializer_UnknownAttribute);
                    model = (T)serializer.Deserialize(newstream);
                }
                else
                {
                    System.Runtime.Serialization.Formatters.Binary.BinaryFormatter bf = null;
                    bf = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
                    model = (T)bf.Deserialize(newstream);
                }
            }
            return model;
        }

        #region 反序列化中出错的问题
        private void serializer_UnknownNode(object sender, XmlNodeEventArgs e)
        {
            string aaaa = "Unknown Node:" + e.Name + "	" + e.Text;
            string bb = string.Empty;
        }

        private void serializer_UnknownAttribute(object sender, XmlAttributeEventArgs e)
        {
            System.Xml.XmlAttribute attr = e.Attr;
            string aaaa = "Unknown attribute " + attr.Name + "='" + attr.Value + "'";
            string bb = string.Empty;
        }
        #endregion

        #endregion
    }
}

/// <summary>
        /// DataGrid数据的序列化
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static string GetDataGridJson<T>(T obj, int total)
        {
            StringBuilder strJson = new StringBuilder();

            if (obj != null)
            {
                DataContractJsonSerializer json = new DataContractJsonSerializer(obj.GetType());
                using (MemoryStream stream = new MemoryStream())
                {
                    json.WriteObject(stream, obj);
                    strJson.Append("{ ");
                    strJson.Append(""rows":");
                    strJson.Append(Encoding.UTF8.GetString(stream.ToArray(), 0, stream.ToArray().Length));
                    strJson.Append(",");

                    strJson.Append(""total":");
                    strJson.Append(total);
                    strJson.Append("}");
                }
                return strJson.ToString();
            }
            else
            {
                return "{ "rows":[],"total":0}";
            }
        }

        /// <summary>
        /// 将json字符串转成list对象
        /// </summary>
        /// <param name="JsonStr">json串</param>
        /// <returns></returns>
        public static List<T> JSONStringToList<T>(string JsonStr)
        {
            JavaScriptSerializer Serializer = new JavaScriptSerializer();
            List<T> objs = Serializer.Deserialize<List<T>>(JsonStr);
            return objs;
        }

调用方式：

//序列化 转换数据至JSON格式 
string strData = JsonHelper.GetJson<List<string>>(listLHCode);//包括List对象集合 <List<T_Users>>

//反序列化

 List<T_Users> dataList = JsonHelper.ParseFromJson<List<T_Users>>(sRtdData);

//未知对象转JSON格式

string strData = JsonHelper.GetUnknownJson(new { Channel = Channel, IP = IP })

引用：

首先添加System.Runtime.Serialization的引用

/*对象转json字符（Kafka）*/  
var args = new Dictionary<string, string> { { "datas", JsonHelper.GetJson<List<WaterRealTimeData>>(listRealData) }
                    , { "username", "cn" }
                    , { "password", "cn" }
                };
            var jsonString = JsonConvert.SerializeObject(args, new JsonSerializerSettings { NullValueHandling = NullValueHandling.Ignore });