Datatable转成Json方式两则
1,
Asp.net C# 使用Newtonsoft.Json 实现DataTable转Json格式数据
1.这里下载:http://www.newtonsoft.com/products/json/
安装:
1.解压下载文件,得到Newtonsoft.Json.dll
2.在项目中添加引用
2.引入命名空间
3.把datatable转换成json格式
其他序列化和反序列化,请自行参考文档资料
安装:
1.解压下载文件,得到Newtonsoft.Json.dll
2.在项目中添加引用
2.引入命名空间
C#代码
- using Newtonsoft.Json;
- using Newtonsoft.Json.Converters;
3.把datatable转换成json格式
C#代码
- public string GetAllCategory()
- {
- string result = "";
- DataTable dt= catDAO.GetAllCategory();
- result=JsonConvert.SerializeObject(dt, new DataTableConverter());
- return result;
- }
其他序列化和反序列化,请自行参考文档资料
2,/*==============================================================================
*
* Filename: DatatableToJson.cs
* Description: 主要包含两个方法:
1. 获取的DataTable 对象 转换为Json 字符串
2. Json 字符串 转换为 DataTable数据集合
* Version: 1.0
* Created: 2012.08.23
* Author: liangjw
* E-mail : liangjw0504@163.com
* Q Q : 592568532
* Profile Url:http://90ideas.net/
* Company: Copyright (C) Create Family Wealth Power By Peter
*
==============================================================================*/
* 备注信息: 上传部分自己总结的常用方法的封装,有不足和不完美之处,希望大家指出来,愿意一起
* 主要研究erp,cms,crm,b2b,oa等系统和网站的开发,欢迎有共同追求和学的IT人员一起学习和交流。
* 学习和讨论有关asp.net mvc ,Ajax ,jquery ,html/css, xml ,sqlserver ,wpf,IIS以及服务器的搭建和安全性相关技术的交流和学习。
*
* Filename: DatatableToJson.cs
* Description: 主要包含两个方法:
1. 获取的DataTable 对象 转换为Json 字符串
2. Json 字符串 转换为 DataTable数据集合
* Version: 1.0
* Created: 2012.08.23
* Author: liangjw
* E-mail : liangjw0504@163.com
* Q Q : 592568532
* Profile Url:http://90ideas.net/
* Company: Copyright (C) Create Family Wealth Power By Peter
*
==============================================================================*/
* 备注信息: 上传部分自己总结的常用方法的封装,有不足和不完美之处,希望大家指出来,愿意一起
* 主要研究erp,cms,crm,b2b,oa等系统和网站的开发,欢迎有共同追求和学的IT人员一起学习和交流。
* 学习和讨论有关asp.net mvc ,Ajax ,jquery ,html/css, xml ,sqlserver ,wpf,IIS以及服务器的搭建和安全性相关技术的交流和学习。
#region DataTable 转换为Json字符串实例方法
/// <summary>
/// GetClassTypeJosn 的摘要说明
/// </summary>
public class GetClassTypeJosn : IHttpHandler
{
/// <summary>
/// 文件名:DataTable 和Json 字符串互转
/// 版权所有:Copyright (C) Create Family Wealth liangjw
/// 创建标示:2013-08-03
/// </summary>
//用法说明实例
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "application/json";
context.Response.Charset = "utf-8";
HttpRequest req = context.Request;
string method = req["method"].ToStr().ToLower();
//获取合同明细列表 DataTable 转换为Json字符串
if (method == "txtdate")
{
string json = "";
BO.MakeContractMx bll = new MakeContractMx();
DataSet ds = bll.GetDataTable();
if (ds.Tables.Count > 0)
{
json =ToJson(ds.Tables[0]);
}
context.Response.Write(json);
return;
}
}
public bool IsReusable
{
get
{
return false;
}
}
}
#endregion
#region Json字符串转换为DataTable 实例方法
public DataTable JsonToDataTable(json)
{
DataTable dt= ToDataTable(json);
return dt;
}
#endregion
#region DataTable 转换为Json 字符串
/// <summary>
/// DataTable 对象 转换为Json 字符串
/// </summary>
/// <param name="dt"></param>
/// <returns></returns>
public static string ToJson(this DataTable dt)
{
JavaScriptSerializer javaScriptSerializer = new JavaScriptSerializer();
javaScriptSerializer.MaxJsonLength = Int32.MaxValue; //取得最大数值
ArrayList arrayList = new ArrayList();
foreach (DataRow dataRow in dt.Rows)
{
Dictionary<string, object> dictionary = new Dictionary<string, object>(); //实例化一个参数集合
foreach (DataColumn dataColumn in dt.Columns)
{
dictionary.Add(dataColumn.ColumnName, dataRow[dataColumn.ColumnName].ToStr());
}
arrayList.Add(dictionary); //ArrayList集合中添加键值
}
return javaScriptSerializer.Serialize(arrayList); //返回一个json字符串
}
#endregion
#region Json 字符串 转换为 DataTable数据集合
/// <summary>
/// Json 字符串 转换为 DataTable数据集合
/// </summary>
/// <param name="json"></param>
/// <returns></returns>
public static DataTable ToDataTable(this string json)
{
DataTable dataTable = new DataTable(); //实例化
DataTable result;
try
{
JavaScriptSerializer javaScriptSerializer = new JavaScriptSerializer();
javaScriptSerializer.MaxJsonLength = Int32.MaxValue; //取得最大数值
ArrayList arrayList = javaScriptSerializer.Deserialize<ArrayList>(json);
if (arrayList.Count > 0)
{
foreach (Dictionary<string, object> dictionary in arrayList)
{
if (dictionary.Keys.Count<string>() == 0)
{
result = dataTable;
return result;
}
if (dataTable.Columns.Count == 0)
{
foreach (string current in dictionary.Keys)
{
dataTable.Columns.Add(current, dictionary[current].GetType());
}
}
DataRow dataRow = dataTable.NewRow();
foreach (string current in dictionary.Keys)
{
dataRow[current] = dictionary[current];
}
dataTable.Rows.Add(dataRow); //循环添加行到DataTable中
}
}
}
catch
{
}
result = dataTable;
return result;
}
#endregion
#region 转换为string字符串类型
/// <summary>
/// 转换为string字符串类型
/// </summary>
/// <param name="s">获取需要转换的值</param>
/// <param name="format">需要格式化的位数</param>
/// <returns>返回一个新的字符串</returns>
public static string ToStr(this object s, string format = "")
{
string result = "";
try
{
if (format == "")
{
result = s.ToString();
}
else
{
result = string.Format("{0:" + format + "}", s);
}
}
catch
{
}
return result;
}
#endregion
/// <summary>
/// GetClassTypeJosn 的摘要说明
/// </summary>
public class GetClassTypeJosn : IHttpHandler
{
/// <summary>
/// 文件名:DataTable 和Json 字符串互转
/// 版权所有:Copyright (C) Create Family Wealth liangjw
/// 创建标示:2013-08-03
/// </summary>
//用法说明实例
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "application/json";
context.Response.Charset = "utf-8";
HttpRequest req = context.Request;
string method = req["method"].ToStr().ToLower();
//获取合同明细列表 DataTable 转换为Json字符串
if (method == "txtdate")
{
string json = "";
BO.MakeContractMx bll = new MakeContractMx();
DataSet ds = bll.GetDataTable();
if (ds.Tables.Count > 0)
{
json =ToJson(ds.Tables[0]);
}
context.Response.Write(json);
return;
}
}
public bool IsReusable
{
get
{
return false;
}
}
}
#endregion
#region Json字符串转换为DataTable 实例方法
public DataTable JsonToDataTable(json)
{
DataTable dt= ToDataTable(json);
return dt;
}
#endregion
#region DataTable 转换为Json 字符串
/// <summary>
/// DataTable 对象 转换为Json 字符串
/// </summary>
/// <param name="dt"></param>
/// <returns></returns>
public static string ToJson(this DataTable dt)
{
JavaScriptSerializer javaScriptSerializer = new JavaScriptSerializer();
javaScriptSerializer.MaxJsonLength = Int32.MaxValue; //取得最大数值
ArrayList arrayList = new ArrayList();
foreach (DataRow dataRow in dt.Rows)
{
Dictionary<string, object> dictionary = new Dictionary<string, object>(); //实例化一个参数集合
foreach (DataColumn dataColumn in dt.Columns)
{
dictionary.Add(dataColumn.ColumnName, dataRow[dataColumn.ColumnName].ToStr());
}
arrayList.Add(dictionary); //ArrayList集合中添加键值
}
return javaScriptSerializer.Serialize(arrayList); //返回一个json字符串
}
#endregion
#region Json 字符串 转换为 DataTable数据集合
/// <summary>
/// Json 字符串 转换为 DataTable数据集合
/// </summary>
/// <param name="json"></param>
/// <returns></returns>
public static DataTable ToDataTable(this string json)
{
DataTable dataTable = new DataTable(); //实例化
DataTable result;
try
{
JavaScriptSerializer javaScriptSerializer = new JavaScriptSerializer();
javaScriptSerializer.MaxJsonLength = Int32.MaxValue; //取得最大数值
ArrayList arrayList = javaScriptSerializer.Deserialize<ArrayList>(json);
if (arrayList.Count > 0)
{
foreach (Dictionary<string, object> dictionary in arrayList)
{
if (dictionary.Keys.Count<string>() == 0)
{
result = dataTable;
return result;
}
if (dataTable.Columns.Count == 0)
{
foreach (string current in dictionary.Keys)
{
dataTable.Columns.Add(current, dictionary[current].GetType());
}
}
DataRow dataRow = dataTable.NewRow();
foreach (string current in dictionary.Keys)
{
dataRow[current] = dictionary[current];
}
dataTable.Rows.Add(dataRow); //循环添加行到DataTable中
}
}
}
catch
{
}
result = dataTable;
return result;
}
#endregion
#region 转换为string字符串类型
/// <summary>
/// 转换为string字符串类型
/// </summary>
/// <param name="s">获取需要转换的值</param>
/// <param name="format">需要格式化的位数</param>
/// <returns>返回一个新的字符串</returns>
public static string ToStr(this object s, string format = "")
{
string result = "";
try
{
if (format == "")
{
result = s.ToString();
}
else
{
result = string.Format("{0:" + format + "}", s);
}
}
catch
{
}
return result;
}
#endregion