XmlToJSON（c#）

using System.Text;//StringBuilder
using System.Xml;//xml
using System.Collections;//SortedList
using System.Web.UI;//ClientScriptManager



  XmlDocument doc = new XmlDocument();
  string sURL = "http://rainmeter.accu-weather.com/widget/rainmeter/weather-data.asp?location=ASI|CN|CH007|YULIN&metric=c";
  doc.Load(sURL); 
  string JSON = XmlToJSON(doc);
  // Replace \ with \\ because string is being decoded twice
  JSON = JSON.Replace(@"\", @"\\");
  // Insert code to process JSON at end of page
  // ClientScriptManager cs = Page.ClientScript;
 //cs.RegisterStartupScript(GetType(), "SpaceJSON", "space_processJSON('" + JSON + "');", true);



 private static string XmlToJSON(XmlDocument xmlDoc)
    {
        StringBuilder sbJSON = new StringBuilder();
        sbJSON.Append("{ ");
        XmlToJSONnode(sbJSON, xmlDoc.DocumentElement, true);
        sbJSON.Append("}");
        return sbJSON.ToString();
    }

    private static void XmlToJSONnode(StringBuilder sbJSON, XmlElement node, bool showNodeName)
    {
        if (showNodeName)
            sbJSON.Append("\"" + SafeJSON(node.Name) + "\": ");
        sbJSON.Append("{");
        SortedList childNodeNames = new SortedList();

        if (node.Attributes != null)
            foreach (XmlAttribute attr in node.Attributes)
                StoreChildNode(childNodeNames, attr.Name, attr.InnerText);


        foreach (XmlNode cnode in node.ChildNodes)
        {
            if (cnode is XmlText)
                StoreChildNode(childNodeNames, "value", cnode.InnerText);
            else if (cnode is XmlElement)
                StoreChildNode(childNodeNames, cnode.Name, cnode);
        }


        foreach (string childname in childNodeNames.Keys)
        {
            ArrayList alChild = (ArrayList)childNodeNames[childname];
            if (alChild.Count == 1)
                OutputNode(childname, alChild[0], sbJSON, true);
            else
            {
                sbJSON.Append(" \"" + SafeJSON(childname) + "\": [ ");
                foreach (object Child in alChild)
                    OutputNode(childname, Child, sbJSON, false);
                sbJSON.Remove(sbJSON.Length - 2, 2);
                sbJSON.Append(" ], ");
            }
        }
        sbJSON.Remove(sbJSON.Length - 2, 2);
        sbJSON.Append(" }");
    }


    private static void StoreChildNode(SortedList childNodeNames, string nodeName, object nodeValue)
    {

        if (nodeValue is XmlElement)
        {           
            XmlNode cnode = (XmlNode)nodeValue;
            if (cnode.Attributes.Count == 0)
            {
                XmlNodeList children = cnode.ChildNodes;
                if (children.Count == 0)
                    nodeValue = null;
                else if (children.Count == 1 && (children[0] is XmlText))
                    nodeValue = ((XmlText)(children[0])).InnerText;
            }
        }

        object oValuesAL = childNodeNames[nodeName];
        ArrayList ValuesAL;
        if (oValuesAL == null)
        {
            ValuesAL = new ArrayList();
            childNodeNames[nodeName] = ValuesAL;
        }
        else
            ValuesAL = (ArrayList)oValuesAL;
        ValuesAL.Add(nodeValue);
    }

    private static void OutputNode(string childname, object alChild, StringBuilder sbJSON, bool showNodeName)
    {
        if (alChild == null)
        {
            if (showNodeName)
                sbJSON.Append("\"" + SafeJSON(childname) + "\": ");
            sbJSON.Append("null");
        }
        else if (alChild is string)
        {
            if (showNodeName)
                sbJSON.Append("\"" + SafeJSON(childname) + "\": ");
            string sChild = (string)alChild;
            sChild = sChild.Trim();
            sbJSON.Append("\"" + SafeJSON(sChild) + "\"");
        }
        else
            XmlToJSONnode(sbJSON, (XmlElement)alChild, showNodeName);
        sbJSON.Append(", ");
    }


    private static string SafeJSON(string sIn)
    {
        StringBuilder sbOut = new StringBuilder(sIn.Length);
        foreach (char ch in sIn)
        {
            if (Char.IsControl(ch) || ch == '\'')
            {
                int ich = (int)ch;
                sbOut.Append(@"\u" + ich.ToString("x4"));
                continue;
            }
            else if (ch == '\"' || ch == '\\' || ch == '/')
            {
                sbOut.Append('\\');
            }
            sbOut.Append(ch);
        }
        return sbOut.ToString();
    }