序列化泛型 反序列化JSON

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Web.Script.Serialization;

using System.Reflection;

using System.Data;

namespace Business.Util
{

    public class JsonHelper
    {

        public static T ConvertToEntity<T>(string sJson)
        {

            if (string.IsNullOrEmpty(sJson))
            {

                throw new Exception("转换的JSON数据不能为空");

            }

            JavaScriptSerializer js = new JavaScriptSerializer();

            var objDic = js.Deserialize<T>(sJson);

            return objDic;

        }

        ///<summary>

        ///将DataTable转换成Json

        ///</summary>

        ///<param name="jsonName"></param>

        ///<param name="dt"></param>

        ///<returns></returns>

        public static string DataTableToJson(string jsonName, DataTable dt)
        {

            if (dt == null || dt.Rows.Count == 0)
            {

                return "";

            }

            else
            {

                StringBuilder Json = new StringBuilder();

                Json.Append("{\"" + jsonName + "\":[");

                for (int i = 0; i < dt.Rows.Count; i++)
                {

                    Json.Append("{");

                    for (int j = 0; j < dt.Columns.Count; j++)
                    {

                        Json.Append("\"" +
                                    dt.Columns[j].ColumnName.ToString() + "\":\"" + dt.Rows[i][j].ToString() + "\"");

                        if (j < dt.Columns.Count - 1)
                        {

                            Json.Append(",");

                        }

                    }

                    Json.Append("}");

                    if (i < dt.Rows.Count - 1)
                    {

                        Json.Append(",");

                    }

                }

                Json.Append("]}");

                return Json.ToString();

            }

        }

        ///<summary>

        ///将泛型IList转换成Json

        ///</summary>

        ///<typeparam name="T"></typeparam>

        ///<param name="jsonName"></param>

        ///<param name="IL"></param>

        ///<returns></returns>

        public static string ObjectToJson<T>(string jsonName, IList<T> IL)
        {

            StringBuilder Json = new StringBuilder();

            Json.Append("{\"" + jsonName + "\":[");

            if (IL.Count > 0)
            {

                for (int i = 0; i < IL.Count; i++)
                {

                    T obj = Activator.CreateInstance<T>();

                    Type type = obj.GetType();

                    PropertyInfo[] pis = type.GetProperties();

                    Json.Append("{");

                    for (int j = 0; j < pis.Length; j++)
                    {

                        Json.Append("\"" + pis[j].Name.ToString()
                                    + "\":\"" +
                                    pis[j].GetValue(IL[i], null) + "\"");

                        if (j < pis.Length - 1)
                        {

                            Json.Append(",");

                        }

                    }

                    Json.Append("}");

                    if (i < IL.Count - 1)
                    {

                        Json.Append(",");

                    }

                }

            }

            Json.Append("]}");

            return Json.ToString();

        }

    }

}