顯示樹狀風格

Question

我輸入

Sore | aye 
A | 1 
A | 2 
A | 3 
B | 1 
B | 2 

輸出：和我想的頂級表歸類到下面的樹視圖

A 
    1 
    2 
    3 
B 
    1 
    2 

Answer 1

鑑於此對象：

public class MyObject 
{ 
    public string Sore { get; set; } 
    public int aye { get; set; } 
} 

有了這些數據：

var ls=new List<MyObject>(); 
ls.Add(new UserQuery.MyObject(){Sore="A",aye=1}); 
ls.Add(new UserQuery.MyObject(){Sore="A",aye=2}); 
ls.Add(new UserQuery.MyObject(){Sore="A",aye=3}); 
ls.Add(new UserQuery.MyObject(){Sore="B",aye=1}); 
ls.Add(new UserQuery.MyObject(){Sore="B",aye=2}); 

你可以做到這一點很簡單：

var result=ls.GroupBy (l =>l.Sore) 
     .Select (l =>new 
        { 
         Root= l.Key, 
         Children=l.Select (x =>x.aye) 
        } 
       ).ToList(); 

然後就是循環列表：

foreach (var root in result) 
    { 
     //root.Root to the root node 
     foreach(var child in root.Children) 
     { 
      //Add the child to the root nodes children 
     } 
    } 

Answer 2

var str = "Sore | aye\r\nA | 1 \r\nA | 2\r\nA | 3\r\nB | 1\r\nB | 2"; 

var relations = str.Split(new[] {Environment.NewLine}, 
          StringSplitOptions.RemoveEmptyEntries) 
        .Skip(1).Select(l => l.Split('|').Select(
            x => x.Trim()).ToArray()).ToArray(); 

var relationsDic = new SortedDictionary<string, SortedSet<string>>(); 

foreach (var relation in relations) 
{ 
    if (relationsDic.ContainsKey(relation[0])) 
    { 
     relationsDic[relation[0]].Add(relation[1]); 
    } 
    else 
    { 
     relationsDic[relation[0]] = new SortedSet<string> {relation[1]}; 
    } 
} 

foreach (var kvp in relationsDic) 
{ 
    Console.WriteLine(kvp.Key); 

    foreach (var sub in kvp.Value) 
    { 
     Console.WriteLine("\t" + sub); 
    } 
}