JsonHelper 帮助类

JSONHelper

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->using 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);

}

}

}