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C# SortedDictionary.Keys用法及代碼示例


此屬性用於獲取包含SortedDictionary中的鍵的集合。

用法:

public System.Collections.Generic.SortedDictionary<TKey,TValue>.KeyCollection Keys { get; }



返回值：它返回一個包含SortedDictionary中的鍵的集合。

下麵是說明上述財產的用法的程序：

範例1：

// C# code to get the keys 
// in the SortedDictionary 
using System; 
using System.Collections.Generic; 
  
class GFG { 
  
    // Driver code 
    public static void Main() 
    { 
  
        // Create a new SortedDictionary 
        // of strings, with string keys. 
        SortedDictionary<string, string> myDict =  
          new SortedDictionary<string, string>(); 
  
        // Adding key/value pairs in myDict 
        myDict.Add("Australia", "Canberra"); 
        myDict.Add("Belgium", "Brussels"); 
        myDict.Add("Netherlands", "Amsterdam"); 
        myDict.Add("China", "Beijing"); 
        myDict.Add("Russia", "Moscow"); 
        myDict.Add("India", "New Delhi"); 
  
        // To get count of key/value pairs in myDict 
        Console.WriteLine("Total key/value pairs"
            + " in myDict are:" + myDict.Count); 
  
        // To get the keys alone, 
        // use the Keys property. 
        SortedDictionary<string, string>.KeyCollection keyColl =  
                                                    myDict.Keys; 
  
        // The elements of the KeyCollection 
        // are strongly typed with the type 
        // that was specified for dictionary 
        // keys 
        foreach(string s in keyColl) 
        { 
            Console.WriteLine("Key = {0}", s); 
        } 
    } 
}
輸出： 
Total key/value pairs in myDict are:6
Key = Australia
Key = Belgium
Key = China
Key = India
Key = Netherlands
Key = Russia

範例2：

// C# code to get the keys 
// in the SortedDictionary 
using System; 
using System.Collections.Generic; 
  
class GFG { 
  
    // Driver code 
    public static void Main() 
    { 
  
        // Create a new SortedDictionary 
        // of ints, with int keys. 
        SortedDictionary<int, int> myDict =  
          new SortedDictionary<int, int>(); 
  
        // Adding key/value pairs in myDict 
        myDict.Add(9, 8); 
        myDict.Add(3, 4); 
        myDict.Add(4, 7); 
        myDict.Add(1, 7); 
  
        // To get count of key/value pairs in myDict 
        Console.WriteLine("Total key/value pairs"
            + " in myDict are:" + myDict.Count); 
  
        // To get the keys alone, 
        // use the Keys property. 
        SortedDictionary<int, int>.KeyCollection keyColl =  
                                              myDict.Keys; 
  
        // The elements of the KeyCollection 
        // are strongly typed with the type 
        // that was specified for dictionary 
        // keys 
        foreach(int s in keyColl) 
        { 
            Console.WriteLine("Key = {0}", s); 
        } 
    } 
}
輸出： 
Total key/value pairs in myDict are:4
Key = 1
Key = 3
Key = 4
Key = 9

參考：



相關用法


注：本文由純淨天空篩選整理自rupesh_rao大神的英文原創作品 C# | SortedDictionary.Keys Property。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。