Datatable序列化和反序列化

/// <summary>
        /// DataTable序列化
        /// </summary>
        /// <param name="dt"></param>
        /// <returns></returns>
        public static string SerializeDataTable(this DataTable dt)
        {
            JavaScriptSerializer serializer = new JavaScriptSerializer();
            List<Dictionary<string, object>> list = new List<Dictionary<string, object>>();
            foreach (DataRow dr in dt.Rows)//每一行信息，新建一个Dictionary<string,object>,将该行的每列信息加入到字典
            {
                Dictionary<string, object> result = new Dictionary<string, object>();
                foreach (DataColumn dc in dt.Columns)
                {
                    result.Add(dc.ColumnName, dr[dc].ToString());
                }
                list.Add(result);
            }
            return serializer.Serialize(list);//调用Serializer方法
        }

        /// <summary>
        /// DataTable反序列化
        /// </summary>
        /// <param name="strJson"></param>
        /// <returns></returns>
        public static DataTable DeserializerTable(this string strJson)
        {
            DataTable dt = new DataTable();
            JavaScriptSerializer serializer = new JavaScriptSerializer();
            ArrayList arralList = serializer.Deserialize<ArrayList>(strJson);//反序列化ArrayList类型
            if (arralList.Count == 0)//反序列化后ArrayList个数不为0
            {
                return dt;
            }

            foreach (Dictionary<string, object> row in arralList)
            {
                if (dt.Columns.Count == 0)//新建的DataTable中无任何信息，为其添加列名及类型
                {
                    foreach (string key in row.Keys)
                    {
                        dt.Columns.Add(key, row[key].GetType());//添加dt的列名
                    }
                }
                DataRow dr = dt.NewRow();
                foreach (string key in row.Keys)//讲arrayList中的值添加到DataTable中
                {
                    dr[key] = row[key];//添加列值
                }
                dt.Rows.Add(dr);//添加一行
            }
            return dt;
        }