XML 之 与Json或String的相互转换

1、XML与String的相互转换

[1] XML 转为 String

//载入Xml文件
XmlDocument xdoc = new XmlDocument();
xdoc.Load("xml文件");

string xmlStr = xdoc.InnerXml;

[2] String 转为 XML

//载入Xml字符串
XmlDocument xdoc = new XmlDocument();
xdoc.LoadXml("xml字符串");

//保存为Xml文件
xdoc.Save("xml文件");

2、XML 与 Json 的相互转换

[1] XML 转换为 Json

using System.Xml;
using Newtonsoft.Json;  

string xml = "<xml><Name>Test class</Name><X>100</X><Y>200</Y></xml>";
XmlDocument doc = new XmlDocument();
doc.LoadXml(xml);
string json = Newtonsoft.Json.JsonConvert.SerializeXmlNode(doc);  

[2] Json 转换为 XML

方法一：

string json = Newtonsoft.Json.JsonConvert.SerializeXmlNode(xml);
XmlDocument xmlDoc = Newtonsoft.Json.JsonConvert.DeserializeXmlNode(json);
xmlDoc.Save("F:/example.xml");

方法二：

　　　　using System.Xml;　　　　using System.Runtime.Serialization.Json;　　　　using System.Web.Script.Serialization;　　　　/// <summary>
       /// json字符串转换为Xml对象
       /// XmlDictionaryReader命名空间为using System.Runtime.Serialization.Json;
       /// JavaScriptSerializer需添加System.Web.Extensions.dll引用　　　　/// JavaScriptSerializer命名空间为System.Web.Script.Serialization;
       /// </summary>
       /// <param name="sJson"></param>
       /// <returns></returns>
       public static XmlDocument Json2Xml(string sJson)
       {
           //XmlDictionaryReader reader = JsonReaderWriterFactory.CreateJsonReader(Encoding.UTF8.GetBytes(sJson), XmlDictionaryReaderQuotas.Max);
           //XmlDocument doc = new XmlDocument();
           //doc.Load(reader);  

           JavaScriptSerializer oSerializer = new JavaScriptSerializer();
           Dictionary<string, object> Dic = (Dictionary<string, object>)oSerializer.DeserializeObject(sJson);
           XmlDocument doc = new XmlDocument();
           XmlDeclaration xmlDec = doc.CreateXmlDeclaration("1.0", "UTF-8", "yes");
           doc.InsertBefore(xmlDec, doc.DocumentElement);
           XmlElement nRoot = doc.CreateElement("root");
           doc.AppendChild(nRoot);
           foreach (KeyValuePair<string, object> item in Dic)
           {
               XmlElement element = doc.CreateElement(item.Key);
               KeyValue2Xml(element, item);
               nRoot.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>))
           {
               foreach (KeyValuePair<string, object> item in kValue as Dictionary<string, object>)
               {
                   XmlElement element = node.OwnerDocument.CreateElement(item.Key);
                   KeyValue2Xml(element, item);
                   node.AppendChild(element);
               }
           }
           else if (kValue.GetType() == typeof(object[]))
           {
               object[] o = kValue as object[];
               for (int i = 0; i < o.Length; i++)
               {
                   XmlElement xitem = node.OwnerDocument.CreateElement("Item");
                   KeyValuePair<string, object> item = new KeyValuePair<string, object>("Item", o[i]);
                   KeyValue2Xml(xitem, item);
                   node.AppendChild(xitem);
               }           }
           else
           {
               XmlText text = node.OwnerDocument.CreateTextNode(kValue.ToString());
               node.AppendChild(text);
           }
       }