C#-এ Dictionary.Keys প্রোপার্টি

C#-এ Dictionary.Keys প্রোপার্টিটি ডিকশনারি-এ থাকা সকল কী (keys) ফেচ (fetch) করতে ব্যবহৃত হয়।

সিনট্যাক্স

নিচে সিনট্যাক্স দেওয়া হলো:

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

উদাহরণ

Dictionary.Keys প্রোপার্টি বাস্তবায়নের প্রথম উদাহরণ:

using System;
using System.Collections.Generic;
public class Demo {
    public static void Main(){
        Dictionary<string, string> dict = new Dictionary<string, string>();
        dict.Add("One", "Kagido");
        dict.Add("Two", "Ngidi");
        dict.Add("Three", "Devillers");
        dict.Add("Four", "Smith");
        dict.Add("Five", "Warner");
        Console.WriteLine("Count of elements = " + dict.Count);
        Console.WriteLine("\nKey/value pairs...");
        foreach(KeyValuePair<string, string> res in dict){
            Console.WriteLine("Key = {0}, Value = {1}", res.Key, res.Value);
        }
        Console.Write("\nAll the keys..\n");
        Dictionary<string, string>.KeyCollection allKeys = dict.Keys;
        foreach(string str in allKeys){
            Console.WriteLine("Key = {0}", str);
        }
    }
}

আউটপুট

এটি নিচের আউটপুট তৈরি করবে:

Count of elements = 5
Key/value pairs...
Key = One, Value = Kagido
Key = Two, Value = Ngidi
Key = Three, Value = Devillers
Key = Four, Value = Smith
Key = Five, Value = Warner
All the keys..
Key = One
Key = Two
Key = Three
Key = Four
Key = Five

মান আপডেট এবং কী লিস্ট উদাহরণ

মান আপডেট করার পর সকল কী দেখানো:

using System;
using System.Collections.Generic;
public class Demo {
    public static void Main(){
        Dictionary<string, string> dict = new Dictionary<string, string>();
        dict.Add("One", "Chris");
        dict.Add("Two", "Steve");
        dict.Add("Three", "Messi");
        dict.Add("Four", "Ryan");
        dict.Add("Five", "Nathan");
        Console.WriteLine("Count of elements = " + dict.Count);
        Console.WriteLine("\nKey/value pairs...");
        foreach(KeyValuePair<string, string> res in dict){
            Console.WriteLine("Key = {0}, Value = {1}", res.Key, res.Value);
        }
        Console.WriteLine("Value for key three = " + dict["Three"]);
        dict["Three"] = "Katie";
        Console.WriteLine("Updated value associated with key Three...");
        Console.WriteLine(dict["Three"]);
        Console.Write("\nAll the keys..\n");
        Dictionary<string, string>.KeyCollection allKeys = dict.Keys;
        foreach(string str in allKeys){
            Console.WriteLine("Key = {0}", str);
        }
    }
}

আউটপুট

এটি নিচের আউটপুট তৈরি করবে:

Count of elements = 5
Key/value pairs...
Key = One, Value = Chris
Key = Two, Value = Steve
Key = Three, Value = Messi
Key = Four, Value = Ryan
Key = Five, Value = Nathan
Value for key three = Messi
Updated value associated with key Three...
Katie
All the keys..
Key = One
Key = Two
Key = Three
Key = Four
Key = Five