C# में Dictionary.Item[] प्रॉपर्टी

C# में Dictionary.Item[] प्रॉपर्टी का उपयोग Dictionary में निर्दिष्ट कुंजी से जुड़े मान को प्राप्त या सेट करने के लिए किया जाता है।

सिंटैक्स

निम्नलिखित सिंटैक्स है:

public TValue this[TKey key] { get; set; }

उदाहरण

आइए अब Dictionary.Item[] प्रॉपर्टी को लागू करने का एक उदाहरण देखें:

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"] = "Ronaldo"; 
        Console.Write("Updated value associated with key Three..."); 
        Console.WriteLine(dict["Three"]); 
        if (dict.ContainsValue("Angelina")) 
            Console.WriteLine("\n\nValue found!"); 
        else 
            Console.WriteLine("\n\nValue isn't in the dictionary!"); 
        dict.Clear(); 
        Console.WriteLine("Cleared Key/value pairs..."); 
        foreach(KeyValuePair<string, string> res in dict){ 
            Console.WriteLine("Key = {0}, Value = {1}", res.Key, res.Value); 
        } 
        Console.WriteLine("Count of elements now = " + dict.Count); 
    } 
}

आउटपुट

यह निम्नलिखित आउटपुट उत्पन्न करेगा:

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...Ronaldo 
Value isn't in the dictionary! 
Cleared Key/value pairs... 
Count of elements now = 0

उदाहरण

आइए अब Dictionary.Item[] मेथड को लागू करने का एक और उदाहरण देखें:

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.Write("Updated value associated with key Three..."); 
        Console.WriteLine(dict["Three"]); 
    } 
}

आउटपुट

यह निम्नलिखित आउटपुट उत्पन्न करेगा:

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