C＃ - 一次讀取XML的問題。還有錯誤檢查是否存在。 [XElement]

Question

更新了以下建議的更改。

我一直在嘗試解決這個問題大約2天，現在持續3-4小時，並且沒有太遠。任何幫助表示讚賞。

好的，所以基本上每次有人死亡時都會運行。如果我運行它一次，它工作正常。但是，如果我再次運行它，它什麼也不返回。

public static string Death(string username) 
    { 
     if (File.Exists(path)) 
     { 
      XElement kd = XElement.Load(path); 
      Console.WriteLine("[SimplePlugin] Death Recorded for: " + username + "!"); 
      var player = kd.Elements("player").Single(p => p.Attribute("name").Value == username); 

      int add = int.Parse(player.Element("deaths").Value) + 1; //Dies Here. 

      player.SetElementValue("deaths", add); 
      player.Save(path); 
      kills = int.Parse(player.Element("kills").Value); 
      deaths = int.Parse(player.Element("deaths").Value); 
      return (username + " has " + kills + " kills and " + deaths + " deaths."); 
     } 
     else 
     { 
      Console.WriteLine("[SimpleStats] Writing SimpleConfig.XML..."); 
      XElement kd = new XElement(
      "SimpleStats", 
      new XElement("player", 
       new XAttribute("name", username), 
      new XElement("kills", 0), 
      new XElement("deaths", 0), 
      new XElement("time", 0))); 
      kd.Save(path); 
      Console.WriteLine("[Simple] Done!"); 
      return (username + " has " + kills + " kills and " + deaths + " deaths."); 
     } 
    } 

---

我的第二個問題是當在XML玩家名稱= 「NAME」 已經存在。即使用戶名匹配，它也會重新創建它。

代碼此：

public static string Load(string username) 
    { 

     if (File.Exists(path)) 
     { 
      XElement kd = XElement.Load(path); 
      var player = kd.Elements("player").SingleOrDefault(p => p.Attribute("name").Value == username); 
      Console.WriteLine(player); 

      if (player == null) 
      { 
       Console.WriteLine("[SimplePlugin] Writing new XML data for " + username + "."); 
       kd.Add(new XElement("player", 
           new XAttribute("name", username), 
          new XElement("kills", 0), 
          new XElement("deaths", 0), 
          new XElement("time", 0))); 
       kd.Save(path); 
       return (username + " has " + kills + " kills and " + deaths + " deaths."); 
      } 
      else 
      { 
       kills = int.Parse(player.Element("kills").Value); 
       deaths = int.Parse(player.Element("deaths").Value); 
       return (username + " has " + kills + " kills and " + deaths + " deaths."); 
      } 
     } 
     else 
     { 
      Console.WriteLine("Doesnt Exist"); 
      Console.WriteLine("[SimpleStats] Writing SimpleConfig.XML..."); 
      XElement player = new XElement(
      "SimpleStats", 
      new XElement("player", 
       new XAttribute("name", username), 
      new XElement("kills", 0), 
      new XElement("deaths", 0), 
      new XElement("time", 0))); 
      player.Save(path); 
      Console.WriteLine("[Simple] Done!"); 
      return (username + " has " + kills + " kills and " + deaths + " deaths."); 
     } 
    } 

的字符串被髮送到負載（）。加載檢查以查看xml是否存在。如果沒有，創建它。如果是這樣，創建它。然後檢查用戶名是否存在於xml數據中。如果它讀取並返回該字符串。如果沒有，它會創建它。

另外：「這個問題沒有顯示任何研究工作;它不清楚或沒有用」 如何？

Answer 1

爲了您的第一個問題，做這個

player.Element("deaths").Value = Convert.ToInt32(player.Element("deaths").Value) + 1; 

由於XElement.Value類型爲System.String

Answer 2

第二個問題：你需要使用Value屬性來獲得屬性值。

var player = kd.Elements("player").SingleOrDefault(p => p.Attribute("name").Value == username); 

您需要修改整個代碼。例如，這些行會給你意想不到的結果：

kills = (int)player.Element("kills"); // explicit casting XElement to int, will return the pointer value. 
deaths = (int)player.Element("deaths"); 

的正確順序

kills = int.Parse(player.Element("kills").Value); 
deaths = int.Parse(player.Element("deaths").Value);