Question

我有两个xmlns属性，我尝试对一个节点进行xpath，但它不起作用

我正在使用XmlDocument，并且尝试从该xml进行xpath。它返回null，因为根节点具有两个xml属性。

   <CreateRequest 
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
       xmlns="http://fex.com/ws/openship/v15">
       <WebAuthenticationDetail>
           <Parent>
               <Key/>
               <Password />
           </Parent>
           <UserCredential>
               <Key />
               <Password />
           </UserCredential>
       </WebAuthenticationDetail>
       <ClientDetail>
           <AccountNumber />
           <MeterNumber />
       </ClientDetail> 
   </CreateRequest>

   var nsmgr = new XmlNamespaceManager(xml.NameTable);
   nsmgr.AddNamespace("xsi", "http://www.w3.org/2001/XMLSchema-instance");     
   var     
   nodes=xml.SelectNodes("/CreateRequest/ClientDetail/AccountNumber",nsmgr);

Answer 1

您的xml具有默认的名称空间。您必须添加它，并为其分配一个前缀（我用过import re import subprocess import time import mysql.connector from mysql.connector import Error from mysql.connector import errorcode print "----------------------------------" print 'Started: {} {}'.format(time.strftime('%d/%m/%y %H:%M:%S'), "") response = subprocess.Popen('speedtest-cli --simple', shell=True, stdout=subprocess.PIPE).stdout.read() ping = re.findall('Ping:\s(.*?)\s', response, re.MULTILINE) download = re.findall('Download:\s(.*?)\s', response, re.MULTILINE) upload = re.findall('Upload:\s(.*?)\s', response, re.MULTILINE) ping[0] = ping[0].replace(',', '.') download[0] = download[0].replace(',', '.') upload[0] = upload[0].replace(',', '.') try: if os.stat('/var/www/html/speed/log.txt').st_size == 0: print 'Date,Time,Ping (ms),Download (Mbit/s),Upload (Mbit/s)' except: pass print 'PING: {}, DOWN: {}, UP: {}'.format(ping[0], download[0], upload[0]) try: connection = mysql.connector.connect(host='localhost', database='dev', user='dev', password='dev1') sql_insert_query = ("""INSERT INTO speedtest(ping, download, upload) VALUES (%s,%s,%s)""", (ping[0], download[0], upload[0])) cursor = connection.cursor() result = cursor.execute(*sql_insert_query) connection.commit() print ("Insert success into speedtest tbl") except mysql.connector.Error as error : connection.rollback() #rollback if any exception occured print("Failed inserting record into speedtest table {}".format(error)) finally: #closing database connection. if(connection.is_connected()): cursor.close() connection.close() print("MySQL conn closed") print 'Finished: {} {}'.format(time.strftime('%d/%m/%y %H:%M:%S'), "")）。然后在xpath中使用此前缀。

按以下方式使用它：

ns

Answer 2

您可以忽略名称空间。

xml.SelectNodes("/*[local-name()='CreateRequest']/*[local-name()='ClientDetail']/*[local-name()='AccountNumber']");

如果根节点2 xmlns url和一个xmlns没有前缀，如何获取'xpath'值？

2 个答案: