首页 .NET/Web C# JSONHelper之Json转换方法大全

C# JSONHelper之Json转换方法大全

作者:胡同里的砖头 围观群众:1127 更新于:2013-12-19

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

/// <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 www.2cto.com  
    /// 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);
    }
}

  • 本文标题: C# JSONHelper之Json转换方法大全
  • 文章分类:【.NET/Web】
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