JsonHelper Json转xml，Json转DataSet，DataSet转Json

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

namespace PowerEasy.Software.OrderSyncLibrary.Commom.Helper
{
/// <summary>
///     JSON数据格式转换
/// </summary>
public class JsonHelper
{
/// <summary>
///     将JSON解析成DataSet（只限标准的JSON数据）
///     例如：Json＝{t1:[{name:'数据name',type:'数据type'}]} 或 Json＝{t1:[{name:'数据name',type:'数据type'}],t2:[{id:'数据id',gx:'数据gx',val:'数据val'}]}
/// </summary>
/// <param name="json">Json字符串</param>
/// <returns>DataSet</returns>
public static DataSet JsonToDataSet(string json)
{
try
{
var ds = new DataSet();
var jss = new JavaScriptSerializer();
object obj = jss.DeserializeObject(json);
var datajson = (Dictionary<string, object>) obj;
foreach (var item in datajson)
{
var dt = new DataTable(item.Key);
var rows = (object[]) item.Value;
foreach (object row in rows)
{
var val = (Dictionary<string, object>) row;
DataRow dr = dt.NewRow();
foreach (var sss in val)
{
if (!dt.Columns.Contains(sss.Key))
{
dt.Columns.Add(sss.Key);
dr[sss.Key] = sss.Value;
}
else
dr[sss.Key] = sss.Value;
}
dt.Rows.Add(dr);
}
ds.Tables.Add(dt);
}
return ds;
}
catch
{
return null;
}
}

/// <summary>
///     将DataSet转化成JSON数据
/// </summary>
/// <param name="ds"></param>
/// <returns></returns>
public static string DataSetToJson(DataSet ds)
{
string json;
try
{
if (ds.Tables.Count == 0)
throw new Exception("DataSet中Tables为0");
json = "{";
for (int i = 0; i < ds.Tables.Count; i++)
{
json += "T" + (i + 1) + ":[";
for (int j = 0; j < ds.Tables[i].Rows.Count; j++)
{
json += "{";
for (int k = 0; k < ds.Tables[i].Columns.Count; k++)
{
json += ds.Tables[i].Columns[k].ColumnName + ":'" + ds.Tables[i].Rows[j][k] + "'";
if (k != ds.Tables[i].Columns.Count - 1)
json += ",";
}
json += "}";
if (j != ds.Tables[i].Rows.Count - 1)
json += ",";
}
json += "]";
if (i != ds.Tables.Count - 1)
json += ",";
}
json += "}";
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
return json;
}

/// <summary>
///     json字符串转换为Xml对象
/// </summary>
/// <param name="sJson"></param>
/// <returns></returns>
public static XmlDocument JsonToXml(string sJson)
{
var serializer = new JavaScriptSerializer();
var dic = (Dictionary<string, object>) serializer.DeserializeObject(sJson);
var doc = new XmlDocument();
XmlDeclaration xmlDec = doc.CreateXmlDeclaration("1.0", "gb2312", "yes");
doc.InsertBefore(xmlDec, doc.DocumentElement);
XmlElement root = doc.CreateElement("root");
doc.AppendChild(root);
foreach (var item in dic)
{
XmlElement element = doc.CreateElement(item.Key);
KeyValue2Xml(element, item);
root.AppendChild(element);
}
return doc;
}

private static void KeyValue2Xml(XmlElement node, KeyValuePair<string, object> source)
{
object kValue = source.Value;
if (kValue.GetType() == typeof (Dictionary<string, object>))
{
var dictionary = kValue as Dictionary<string, object>;
if (dictionary != null)
foreach (var item in dictionary)
{
if (node.OwnerDocument != null)
{
XmlElement element = node.OwnerDocument.CreateElement(item.Key);
KeyValue2Xml(element, item);
node.AppendChild(element);
}
}
}
else if (kValue.GetType() == typeof (object[]))
{
var o = kValue as object[];
if (o != null)
foreach (object t in o)
{
if (node.OwnerDocument != null)
{
XmlElement xitem = node.OwnerDocument.CreateElement("Item");
var item = new KeyValuePair<string, object>("Item", t);
KeyValue2Xml(xitem, item);
node.AppendChild(xitem);
}
}
}
else
{
if (node.OwnerDocument != null)
{
XmlText text = node.OwnerDocument.CreateTextNode(kValue.ToString());
node.AppendChild(text);
}
}
}
}
}