Json序列化協助類

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最近開發的項目中需要實現.NET和Android程式做介面，實現Android調用.NET服務！
中間以什麼類型的資料進行傳輸呢，因為Android擅長於JSON類型解析，所以最終決定資料轉送格式為JSON，
下面是將對象，集合，等轉換為JSON字串的協助類！

1.首先添加程式集引用
System.Web.Extensions
System.Runtime.Serialization

2.引入命名空間
using System.Runtime.Serialization.Json;
using System.Web.Script.Serialization;

3.將以下代碼拷貝到一個建立類裡面，建立類名叫JsonHelper

 /// <summary>    /// JSON協助類。用於將對象轉換為Json格式的字串，或者將Json的字串轉化為對象。    /// </summary>    public static class JsonHelper    {        /// <summary>        /// 將對象轉化為Json字串         /// </summary>        /// <typeparam name="T">源類型</typeparam>        /// <param name="obj">源類型執行個體</param>        /// <returns>Json字串</returns>        public static string GetJsonFromObj<T>(T obj)        {            DataContractJsonSerializer jsonSerializer = new DataContractJsonSerializer(obj.GetType());            using (MemoryStream ms = new MemoryStream())            {                jsonSerializer.WriteObject(ms, obj);                return Encoding.UTF8.GetString(ms.ToArray());            }        }        /// <summary>        /// 將Json字串轉化為對象        /// </summary>        /// <typeparam name="T">目標類型</typeparam>        /// <param name="strJson">Json字串</param>        /// <returns>目標類型的一個執行個體</returns>        public static T GetObjFromJson<T>(string strJson)        {            T obj = Activator.CreateInstance<T>();            using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(strJson)))            {                DataContractJsonSerializer jsonSerializer = new DataContractJsonSerializer(obj.GetType());                return (T)jsonSerializer.ReadObject(ms);            }        }        /// <summary>        /// 將DataTable轉換為JSON字串        /// </summary>        /// <param name="dt">資料表</param>        /// <returns>JSON字串</returns>        public static string GetJsonFromDataTable(DataTable dt)        {            StringBuilder JsonString = new StringBuilder();            if (dt != null && dt.Rows.Count > 0)            {                JsonString.Append("{ ");                JsonString.Append("\"TableInfo\":[ ");                for (int i = 0; i < dt.Rows.Count; i++)                {                    JsonString.Append("{ ");                    for (int j = 0; j < dt.Columns.Count; j++)                    {                        if (j < dt.Columns.Count - 1)                        {                            JsonString.Append("\"" + dt.Columns[j].ColumnName.ToString() + "\":" + "\"" + dt.Rows[i][j].ToString() + "\",");                        }                        else if (j == dt.Columns.Count - 1)                        {                            JsonString.Append("\"" + dt.Columns[j].ColumnName.ToString() + "\":" + "\"" + dt.Rows[i][j].ToString() + "\"");                        }                    }                    if (i == dt.Rows.Count - 1)                    {                        JsonString.Append("} ");                    }                    else                    {                        JsonString.Append("}, ");                    }                }                JsonString.Append("]}");                return JsonString.ToString();            }            else            {                return null;            }        }        /// <summary>         /// 將對象轉化為Json字串         /// </summary>         /// <param name="obj">來源物件</param>         /// <returns>json資料</returns>         public static string ObjToJson(this object obj)        {            JavaScriptSerializer serialize = new JavaScriptSerializer();            return serialize.Serialize(obj);        }        /// <summary>         /// 將Json字串轉化為對象        /// </summary>         /// <param name="strJson">Json字串</param>         /// <returns>目標對象</returns>        public static T JsonToObj<T>(string strJson)        {            JavaScriptSerializer serialize = new JavaScriptSerializer();            return serialize.Deserialize<T>(strJson);        }        /// <summary>         /// 將對象轉化為Json字串(控制深度 )        /// </summary>         /// <param name="obj">來源物件</param>         /// <param name="recursionDepth">深度</param>         /// <returns>json資料</returns>         public static string ObjToJson(this object obj, int recursionDepth)        {            JavaScriptSerializer serialize = new JavaScriptSerializer();            serialize.RecursionLimit = recursionDepth;            return serialize.Serialize(obj);        }        /// <summary>         /// 將Json字串轉化為對象(控制深度 )        /// </summary>         /// <param name="strJson">Json字串</param>         /// <param name="recursionDepth">深度</param>         /// <returns>目標對象</returns>        public static T JsonToObj<T>(string strJson, int recursionDepth)        {            JavaScriptSerializer serialize = new JavaScriptSerializer();            serialize.RecursionLimit = recursionDepth;            return serialize.Deserialize<T>(strJson);        }        /// <summary>         /// 將DataTable轉換為JSON字串        /// </summary>         /// <param name="dt">DataTable</param>         /// <returns>json資料</returns>         public static string DataTableToJson(DataTable dt)        {            Dictionary<string, object> dic = new Dictionary<string, object>();            int index = 0;            foreach (DataRow dr in dt.Rows)            {                Dictionary<string, object> result = new Dictionary<string, object>();                foreach (DataColumn dc in dt.Columns)                {                    result.Add(dc.ColumnName, dr[dc].ToString());                }                dic.Add(index.ToString(), result);                index++;            }            return ObjToJson(dic);        }    }

　　

Json序列化協助類