Difference between revisions of "CSharp:XML XPath"
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Latest revision as of 12:39, 9 February 2015
XPath
XmlDocument mioXML = new XmlDocument(); mioXML .LoadXml(pathFile); XmlNodeList listaNodi = mioXML.SelectNodes("/Autori/Nominativo"); foreach (XmlNode nodo in listaNodi) { string cognome = nodo["Cognome"].InnerText; string nome = nodo["Nome"].InnerText; Console.WriteLine("Autore: {0} {1}", cognome , nome); }
<?xml version='1.0'?> <Autori> <Nominativo> <Nome>Giovanni</Nome> <Cognome>BIANCHINI</Cognome> </Nominativo> <Nominativo> <Nome>Leo</Nome> <Cognome>ROSSI</Cognome> </Nominativo> </Autori>
Output:
Autore: BIANCHINI Giovanni Autore: ROSSI Leo
Segue una documentazione della tecnologia attraverso esempio:
XmlDocument indexDoc = new XmlDocument(); indexDoc.Load(currentIndexFile); XmlElement indexElementFound = null; string xPathExpProducerCode = "//files.index/file[@Prod_ID=" + ParseXpathString(producerCode) + "]"; XmlNodeList indexElements = indexDoc.SelectNodes(xPathExpProducerCode); if (indexElements != null && indexElements.Count > 0) //Trovato almeno uno? { foreach (XmlElement indexElement in indexElements) { if (indexElement.Attributes["Prod_ID"].Value.Equals(producerCode)) { //trovato producerCode, se anche il brand corrisponde ho trovato la scheda tecnica string supplier_id = indexElement.Attributes["Supplier_id"].Value; // etc } // etc //================================================ // ricerca per EAN //================================================ if (!String.IsNullOrEmpty(prodElement.EAN) && indexElementFound == null) { //string xPathExpProducerCode = "//ICECAT-interface/files.index/file/EAN_UPCS/EAN_UPC[@Value='" + prodElement.EAN + "']"; string xPathExpProducerCode = "//files.index/file/EAN_UPCS/EAN_UPC[@Value='" + prodElement.EAN + "']"; XmlNodeList indexElements = indexDoc.SelectNodes(xPathExpProducerCode); if (indexElements != null && indexElements.Count > 0) { string supplier_id = ((XmlElement)indexElements[0].ParentNode.ParentNode).Attributes["Supplier_id"].Value; if (CheckBrand(prodElement.Brand, prodElement.DataSheetSupplierBrandID, supplier_id, ref supplMappingDoc)) { indexElementFound = (XmlElement)indexElements[0].ParentNode.ParentNode; //Trovato ! } // etc } } // etc } }
Usando Linq
Lettura di un XML usando un attributo.using System.Xml.Linq; using System.Linq; ... XDocument doc = XDocument.Load("FileFullPath"); XElement itemFromIMOInfo = doc.Descendants("key") .Where(t => (string)t.Attribute("key") == "IMO" + imoNumber) .FirstOrDefault();
File XML sorgente:
<?xml version="1.0" encoding="UTF-8"?> <OpcServerConfig xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <DecoderConfig ObjectType="Map"> <key key="#IMO2222222" value=""/> </DecoderConfig> </OpcServerConfig>