解析XML文檔中的C＃

Question

我寫一個C＃代碼來解析下面的XML文檔：

<?xml version="1.0" encoding="utf-8" ?> 
 
<teams> 
 
    <team id="1"> 
 
    <name>RealMadrid</name> 
 
    <players> 
 
     <player id="1" role="Forward"> 
 
     <firstname>Cristiano</firstname> 
 
     <lastname>Ronaldo</lastname> 
 
     <number>7</number> 
 
     </player> 
 
     <player id="2" role="Forward"> 
 
     <firstname>Gareth</firstname> 
 
     <lastname>Bale</lastname> 
 
     <number>11</number> 
 
     </player> 
 
     <player id="3" role="Midfield"> 
 
     <firstname>Toni</firstname> 
 
     <lastname>Kroos</lastname> 
 
     <number>8</number> 
 
     </player> 
 
     <player id="4" role="Midfield"> 
 
     <firstname>Luka</firstname> 
 
     <lastname>Modric</lastname> 
 
     <number>19</number> 
 
     </player> 
 
     <player id="5" role="Defence"> 
 
     <firstname>Sergio</firstname> 
 
     <lastname>Ramos</lastname> 
 
     <number>4</number> 
 
     </player> 
 
     <player id="6" role="Defence"> 
 
     <firstname>Raphael</firstname> 
 
     <lastname>Varane</lastname> 
 
     <number>2</number> 
 
     </player> 
 
     <player id="7" role="Goalkeeper"> 
 
     <firstname>Keylor</firstname> 
 
     <lastname>Navas</lastname> 
 
     <number>1</number> 
 
     </player> 
 
    </players> 
 
    </team> 
 
    
 
    
 
    
 
    <team id="2"> 
 
    <name>Barcelona</name> 
 
    <players> 
 
     <player id="1" role="Forward"> 
 
     <firstname>Lionel</firstname> 
 
     <lastname>Messi</lastname> 
 
     <number>10</number> 
 
     </player> 
 
     <player id="2" role="Forward"> 
 
     <firstname>Neymar</firstname> 
 
     <lastname>Jr.</lastname> 
 
     <number>11</number> 
 
     </player> 
 
     <player id="3" role="Midfield"> 
 
     <firstname>Ivan</firstname> 
 
     <lastname>Rakitic</lastname> 
 
     <number>4</number> 
 
     </player> 
 
     <player id="4" role="Midfield"> 
 
     <firstname>Andres</firstname> 
 
     <lastname>Iniesta</lastname> 
 
     <number>8</number> 
 
     </player> 
 
     <player id="5" role="Defence"> 
 
     <firstname>Gerard</firstname> 
 
     <lastname>Pique</lastname> 
 
     <number>3</number> 
 
     </player> 
 
     <player id="6" role="Defence"> 
 
     <firstname>Javier</firstname> 
 
     <lastname>Mascherano</lastname> 
 
     <number>14</number> 
 
     </player> 
 
     <player id="7" role="Goalkeeper"> 
 
     <firstname>Andre</firstname> 
 
     <lastname>Ter Stegen</lastname> 
 
     <number>1</number> 
 
     </player> 
 
    </players> 
 
    </team> 
 
    
 
    
 
    
 
     
 
    <team id="3"> 
 
    <name>Liverpool</name> 
 
    <players> 
 
     <player id="1" role="Forward"> 
 
     <firstname>Daniel</firstname> 
 
     <lastname>Sturridge</lastname> 
 
     <number>15</number> 
 
     </player> 
 
     <player id="2" role="Forward"> 
 
     <firstname>Roberto</firstname> 
 
     <lastname>Firmino</lastname> 
 
     <number>11</number> 
 
     </player> 
 
     <player id="3" role="Midfield"> 
 
     <firstname>Philippe</firstname> 
 
     <lastname>Coutinho</lastname> 
 
     <number>10</number> 
 
     </player> 
 
     <player id="4" role="Midfield"> 
 
     <firstname>Adam</firstname> 
 
     <lastname>Lallana</lastname> 
 
     <number>20</number> 
 
     </player> 
 
     <player id="5" role="Defence"> 
 
     <firstname>Joel</firstname> 
 
     <lastname>Matip</lastname> 
 
     <number>32</number> 
 
     </player> 
 
     <player id="6" role="Defence"> 
 
     <firstname>Dejan</firstname> 
 
     <lastname>Lovren</lastname> 
 
     <number>6</number> 
 
     </player> 
 
     <player id="7" role="Goalkeeper"> 
 
     <firstname>Simon</firstname> 
 
     <lastname>Mignolet</lastname> 
 
     <number>22</number> 
 
     </player> 
 
    </players> 
 
    </team> 
 
</teams>

我想寫一個特定球隊的球員名字和姓氏。 我寫了下面的代碼：

var realTeam = from db in xelement.Elements("team") 
         where (string)db.Element("name")=="RealMadrid" 
         select db; 
     //Console.WriteLine("Real Madrid"); 
     foreach (var e in realTeam) 
     { 
      Console.WriteLine(e); 
     } 

這個代碼是給所有與「皇馬」的XML部分。 我應該怎樣寫這部分的名字和姓氏？

任何幫助表示讚賞！

Answer 1

正如我在我的評論中提到，你不是在你的陳述中選擇players元素。請嘗試以下操作：

var realTeam = from db in xelement.Elements("team") 
       where (string)db.Element("name")=="RealMadrid" 
       select db.Elements("players"); 
//Console.WriteLine("Real Madrid"); 
if (realTeam.Count() != 1) 
{ 
    //more than 1 team called RealMadrid was found, handle this case here 
    return; 
} 
foreach (var e in realTeam.Single()) 
{ 
    Console.WriteLine("First Name: " + e.Element("firstname").Value); //or e.Element("firstname").ToString() 
    Console.WriteLine("Last Name: " + e.Element("lastname").Value); 
} 

Answer 2

做這樣的：

var xmlContent = "YOUR XML"; 
    var xmlDoc = XDocument.Parse(xmlContent); 
    var realTeamName = "RealMadrid"; 

    var realTeam = from team in xmlDoc.Elements("teams") 
            .Descendants("team") 
       where team.Element("name").Value == realTeamName 
       select team; 

    var players = realTeam.Elements("players").Elements(); // get players 
    foreach (var player in players)      // iterate over players 
    { 
    Console.WriteLine("First name: " + player.Element("firstname").Value); 
    Console.WriteLine("Last name: " + player.Element("lastname").Value); 
    } 

到目前爲止，你已經得到了球隊，但現在你需要一步進隊元素，獲得了玩家的列表，然後將單個球員名字，姓氏....