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【Asp.Net】 JsonHelper 帮助类

作者:wylsjz / 发布于2015/3/24/ 609


	System;
	using System.Collections.Generic;
	using System.Web;
	using System.Web.Script.Serialization;
	using System.Data;

	
	namespace Sheng.Common
	{
	 /// <summary>
	 /// JSON帮助类
	 /// </summary>
	 public class JSONHelper
	 {
	 /// <summary>
	 /// 对象转JSON
	 /// </summary>
	 /// <param name="obj">对象</param>
	 /// <returns>JSON格式的字符串</returns>
	 public static string ObjectToJSON(object obj)
	 {
	 JavaScriptSerializer jss = new JavaScriptSerializer();
	 try
	 {
	 return jss.Serialize(obj);
	 }
	 catch (Exception ex)
	 {
	
	 throw new Exception("JSONHelper.ObjectToJSON(): " + ex.Message);
	 }
	 }

	
	 /// <summary>
	 /// 数据表转键值对集合
	 /// 把DataTable转成 List集合, 存每一行
	 /// 集合中放的是键值对字典,存每一列
	 /// </summary>
	 /// <param name="dt">数据表</param>
	 /// <returns>哈希表数组</returns>
	 public static List<Dictionary<string, object>> DataTableToList(DataTable dt)
	 {
	 List<Dictionary<string, object>> list
	 = new List<Dictionary<string, object>>();

	
	 foreach (DataRow dr in dt.Rows)
	 {
	 Dictionary<string, object> dic = new Dictionary<string, object>();
	 foreach (DataColumn dc in dt.Columns)
	 {
	 dic.Add(dc.ColumnName, dr[dc.ColumnName]);
	 }
	 list.Add(dic);
	 }
	 return list;
	 }

	
	 /// <summary>
	 /// 数据集转键值对数组字典
	 /// </summary>
	 /// <param name="dataSet">数据集</param>
	 /// <returns>键值对数组字典</returns>
	 public static Dictionary<string, List<Dictionary<string, object>>> DataSetToDic(DataSet ds)
	 {
	 Dictionary<string, List<Dictionary<string, object>>> result = new Dictionary<string, List<Dictionary<string, object>>>();

	
	 foreach (DataTable dt in ds.Tables)
	 result.Add(dt.TableName, DataTableToList(dt));

	
	 return result;
	 }

	
	 /// <summary>
	 /// 数据表转JSON
	 /// </summary>
	 /// <param name="dataTable">数据表</param>
	 /// <returns>JSON字符串</returns>
	 public static string DataTableToJSON(DataTable dt)
	 {
	 return ObjectToJSON(DataTableToList(dt));
	 }

	
	 /// <summary>
	 /// JSON文本转对象,泛型方法
	 /// </summary>
	 /// <typeparam name="T">类型</typeparam>
	 /// <param name="jsonText">JSON文本</param>
	 /// <returns>指定类型的对象</returns>
	 public static T JSONToObject<T>(string jsonText)
	 {
	 JavaScriptSerializer jss = new JavaScriptSerializer();
	 try
	 {
	 return jss.Deserialize<T>(jsonText);
	 }
	 catch (Exception ex)
	 {
	 throw new Exception("JSONHelper.JSONToObject(): " + ex.Message);
	 }
	 }

	
	 /// <summary>
	 /// 将JSON文本转换为数据表数据
	 /// </summary>
	 /// <param name="jsonText">JSON文本</param>
	 /// <returns>数据表字典</returns>
	 public static Dictionary<string, List<Dictionary<string, object>>> TablesDataFromJSON(string jsonText)
	 {
	 return JSONToObject<Dictionary<string, List<Dictionary<string, object>>>>(jsonText);
	 }

	
	 /// <summary>
	 /// 将JSON文本转换成数据行
	 /// </summary>
	 /// <param name="jsonText">JSON文本</param>
	 /// <returns>数据行的字典</returns>
	 public static Dictionary<string, object> DataRowFromJSON(string jsonText)
	 {
	 return JSONToObject<Dictionary<string, object>>(jsonText);
	 }
	 }
	}

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