asp.net DataTable和Dataset序列化成Json格式

DataTableToJson：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.Serialization.Json;
using System.Runtime.Serialization;
using System.IO;
using System.Web.Script.Serialization;
using MicroBlog.Common.APIHelper;
using System.Web;

namespace MicroBlog.Common.APIHelper
{
    public class Resolve
    {
        /// <summary>
        /// JSON文本轉對象,泛型方法
        /// </summary>
        /// <typeparam name="T">類型</typeparam>
        /// <param name="jsonText">JSON文本</param>
        /// <returns>指定類型的對象</returns>
        public static T JSONToObject<T>(string jsonText, HttpContext context)
        {
            JavaScriptSerializer jss = new JavaScriptSerializer();
            try
            {
                return jss.Deserialize<T>(jsonText);
            }
            catch (Exception ex)
            {
                return default(T);
            }
        }

    /// <summary>
    /// 將JSON文本轉換成數據行
    /// </summary>
    /// <param name="jsonText">JSON文本</param>
    /// <returns>數據行的字典</returns>
    public static Dictionary<string, object> DataRowFromJSON(string jsonText, HttpContext context)
    {
        return JSONToObject<Dictionary<string, object>>(jsonText, context);
    }
}

}</pre>調用的話：Dictionary<string, object> dt = Resolve.DataRowFromJSON(requestbuffer, context);
 
DatasetToJson：
public class DataSetConverter : JsonConverter
{
    public override bool CanConvert(Type objectType)
    {
        return typeof(DataSet).IsAssignableFrom(objectType);
    }


public override void WriteJson(JsonWriter writer, object value)
{
    DataSet ds = (DataSet)value;
    writer.WriteStartObject();
    foreach (DataTable dt in ds.Tables)
    {
        writer.WritePropertyName(dt.TableName);
        writer.WriteStartArray();
        foreach (DataRow dr in dt.Rows)
        {
            writer.WriteStartObject();
            foreach (DataColumn dc in dt.Columns)
            {
                writer.WritePropertyName(dc.ColumnName);
                writer.WriteValue(dr[dc].ToString());
            }
            writer.WriteEndObject();
        }
        writer.WriteEndArray();
    }
    writer.WriteEndObject();
}

}</pre>調用的話：JavaScriptConvert.SerializeObject(GetTestDataTable(), new DataTableConverter());