從C＃中的XML文件創建一個括號樹

Question

我想從XML文件中創建一個括號樹。

在托架的匹配由四個小組。該團隊的獲勝者前進到下一輪。

如果比賽包括3支球隊和一個孩子的比賽，那麼孩子匹配決定第四小組父比賽。

這裏是我的XML文件：

<?xml version="1.0" encoding="utf-8" ?> 
    <Round> 
    <Match> 
     <Team id="A1">Apples</Team> 
     <Team id="B2">Banannas</Team> 
     <Team id="C3">Cantalopes</Team> 
     <Team id="D4">Durians</Team> 
    </Match> 
    <Match> 
     <Team id="A2">Avocados</Team> 
     <Team id="B2">Blueberry</Team> 
     <Team id="C3">Coconut</Team> 
     <Team id="TBD"> 
     <Match> 
      <Team id="A3">Apricots</Team> 
      <Team id="B5">Banannas</Team> 
      <Team id="C9">Cantalopes</Team> 
      <Team id="D6">Durians</Team> 
     </Match> 
     </Team> 
    </Match> 
    </Round> 

這裏是我的函數來創建樹：

private void CreateTree(XmlTextReader reader, Node<Match<Team>> parent, Match<Team> currentMatch) 
    { 
     if (reader.Read()) 
     { 
      if (reader.IsStartElement()) 
      { 
       switch (reader.Name) 
       { 
        case "Match": //We need to make a new match! 
         currentMatch = new Match<Team>(); 
         Node<Match<Team>> child = new Node<Match<Team>>(currentMatch); 
         parent.Add(currentMatch); 
         CreateTree(reader, child, currentMatch); 
         break; 
        case "Team": //We need to add a team! 
         string id = reader.GetAttribute("id"); 
         if (id != "TBD") 
         { 
          string name = reader.Value; 
          currentMatch.Add(new Team(id, name)); 
         } 
         else 
         { 
          currentMatch.Add(Team.Tbd); 
         } 
         CreateTree(reader, parent, currentMatch); 
         break; 
        default: 
         break; 
       } 
      } 
      else 
      { 
       CreateTree(reader, parent.Parent, null); 
      } 
     } 
    } 

我最初調用該函數以下列方式：

string path = Path.Combine(Environment.CurrentDirectory, @"Data\", fileName); 
XmlTextReader reader = new XmlTextReader(path); 
CreateTree(reader, tree, null); 
reader.Close(); 

不幸的是，這不起作用，我的樹是空的，而且我很難弄清楚我做錯了什麼。任何幫助搞清楚這將不勝感激！

謝謝！

Answer 1

嘗試以下操作：

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Xml; 

namespace ConsoleApplication1 
{ 
    class Program 
    { 
     const string FILENAME = @"c:\temp\test.xml"; 
     static void Main(string[] args) 
     { 
      Node node = new Node(FILENAME); 
      node.Print(node, 1); 
      Console.ReadLine(); 
     } 
    } 
    public class Team 
    { 
     public string name { get; set; } 
     public string id { get; set; } 
    } 

    public class Node 
    { 
     public Node child = null; 
     public List<List<Team>> matches = new List<List<Team>>(); 

     public Node() 
     { 
     } 
     public Node(string filename) 
     { 
      XmlReader reader = XmlTextReader.Create(filename); 
      CreateTree(reader, this, false); 
     } 
     private void CreateTree(XmlReader reader, Node parent, Boolean isChild) 
     { 
      Boolean endElement = false; 
      while (!reader.EOF && !endElement) 
      { 
       if (!isChild) 
       { 
        reader.Read(); 
       } 
       isChild = false; 

       if (!reader.EOF) 
       { 
        switch (reader.NodeType) 
        { 
         case XmlNodeType.Element: 
          switch (reader.Name) 
          { 
           case "Match": //We need to make a new match 
            List<Team> match = new List<Team>(); 
            parent.matches.Add(match); 
            CreateTree(reader, parent, false); 
            break; 
           case "Team": //We need to add a team! 
            parent.matches.Last().Add(new Team() { 
             id = reader.GetAttribute("id"), 
             name = reader.ReadString().Trim() 
            }); 
            if (reader.Name == "Match") 
            { 
             parent.child = new Node(); 
             CreateTree(reader, parent.child, true); 
            } 
            break; 
           default: 
            break; 
          } 
          break; 
         case XmlNodeType.EndElement: 
          //break out of while loop 
          endElement = true; 
          break; 
        } 
       } 
      } 
     } 
     public void Print(Node node, int level) 
     { 
      foreach (List<Team> match in node.matches) 
      { 
       Console.WriteLine("{0} Match", new string(' ',5 * level)); 
       foreach (Team team in match) 
       { 
        Console.WriteLine("{0} Team : Name = '{1}', Id = '{2}'", new string(' ', (5 * level) + 3), team.name, team.id); 
       } 
      } 
      if (node.child != null) 
      { 
       Print(node.child, level + 1); 
      } 
     } 
    } 
}