ASP.NET中XML转JSON的方法实例
本文实例讲述了ASP.NET中XML转JSON的方法，分享给大家供大家参考。具体如下：
一般在许多应用程序中都将数据存储为XML的格式，而且会将数据以JSON的格式发送到客户端以做进一步处理。要实现这一点，它们必须将XML格式转换为JSON格式。
XML转JSON代码如下：
privatestaticstringXmlToJSON(XmlDocumentxmlDoc)
{
StringBuildersbJSON=newStringBuilder();
sbJSON.Append("{");
XmlToJSONnode(sbJSON,xmlDoc.DocumentElement,true);
sbJSON.Append("}");
returnsbJSON.ToString();
}
// XmlToJSONnode: OutputanXmlElement,possiblyaspartofahigherarray
privatestaticvoidXmlToJSONnode(StringBuildersbJSON,XmlElementnode,boolshowNodeName)
{
if(showNodeName)
sbJSON.Append("\\""+SafeJSON(node.Name)+"\\":");
sbJSON.Append("{");
//Buildasortedlistofkey-valuepairs
// where keyiscase-sensitivenodeName
// valueisanArrayListofstringorXmlElement
// sothatweknowwhetherthenodeNameisanarrayornot.
SortedListchildNodeNames=newSortedList();
// Addinallnodeattributes
if(node.Attributes!=null)
foreach(XmlAttributeattrinnode.Attributes)
StoreChildNode(childNodeNames,attr.Name,attr.InnerText);
// Addinallnodes
foreach(XmlNodecnodeinnode.ChildNodes)
{
if(cnodeisXmlText)
StoreChildNode(childNodeNames,"value",cnode.InnerText);
elseif(cnodeisXmlElement)
StoreChildNode(childNodeNames,cnode.Name,cnode);
}
//Nowoutputallstoredinfo
foreach(stringchildnameinchildNodeNames.Keys)
{
ArrayListalChild=(ArrayList)childNodeNames[childname];
if(alChild.Count==1)
OutputNode(childname,alChild[0],sbJSON,true);
else
{
sbJSON.Append("\\""+SafeJSON(childname)+"\\":[");
foreach(objectChildinalChild)
OutputNode(childname,Child,sbJSON,false);
sbJSON.Remove(sbJSON.Length-2,2);
sbJSON.Append("],");
}
}
sbJSON.Remove(sbJSON.Length-2,2);
sbJSON.Append("}");
}
// StoreChildNode:StoredataassociatedwitheachnodeName
// sothatweknowwhetherthenodeNameisanarrayornot.
privatestaticvoidStoreChildNode(SortedListchildNodeNames,stringnodeName,objectnodeValue)
{
//Pre-processcontractionofXmlElement-s
if(nodeValueisXmlElement)
{
//Convert <aa></aa>into"aa":null
// <aa>xx</aa>into"aa":"xx"
XmlNodecnode=(XmlNode)nodeValue;
if(cnode.Attributes.Count==0)
{
XmlNodeListchildren=cnode.ChildNodes;
if(children.Count==0)
nodeValue=null;
elseif(children.Count==1&&(children[0]isXmlText))
nodeValue=((XmlText)(children[0])).InnerText;
}
}
//AddnodeValuetoArrayListassociatedwitheachnodeName
//IfnodeNamedoesn'texistthenaddit
objectoValuesAL=childNodeNames[nodeName];
ArrayListValuesAL;
if(oValuesAL==null)
{
ValuesAL=newArrayList();
childNodeNames[nodeName]=ValuesAL;
}
else
ValuesAL=(ArrayList)oValuesAL;
ValuesAL.Add(nodeValue);
}
privatestaticvoidOutputNode(stringchildname,objectalChild,StringBuildersbJSON,boolshowNodeName)
{
if(alChild==null)
{
if(showNodeName)
sbJSON.Append("\\""+SafeJSON(childname)+"\\":");
sbJSON.Append("null");
}
elseif(alChildisstring)
{
if(showNodeName)
sbJSON.Append("\\""+SafeJSON(childname)+"\\":");
stringsChild=(string)alChild;
sChild=sChild.Trim();
sbJSON.Append("\\""+SafeJSON(sChild)+"\\"");
}
else
XmlToJSONnode(sbJSON,(XmlElement)alChild,showNodeName);
sbJSON.Append(",");
}
//MakeastringsafeforJSON
privatestaticstringSafeJSON(stringsIn)
{
StringBuildersbOut=newStringBuilder(sIn.Length);
foreach(charchinsIn)
{
if(Char.IsControl(ch)||ch=='\\'')
{
intich=(int)ch;
sbOut.Append(@"\\u"+ich.ToString("x4"));
continue;
}
elseif(ch=='\\"'||ch=='\\\\'||ch=='/')
{
sbOut.Append('\\\\');
}
sbOut.Append(ch);
}
returnsbOut.ToString();
}
希望本文所述对大家的asp.net程序设计有所帮助。