C#-এ Dictionary.Item[] প্রোপার্টিটি ডিকশনারি-এ নির্দিষ্ট কী-এর সাথে যুক্ত মান পাওয়া বা সেট করার জন্য ব্যবহৃত হয়।
সিনট্যাক্স
নিচে সিনট্যাক্স দেওয়া হলো:
public TValue this[TKey key] { get; set; }
উদাহরণ
Dictionary.Item[] প্রোপার্টি বাস্তবায়নের প্রথম উদাহরণ (মান আপডেট এবং ক্লিয়ার):
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);
}
}
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...Ronaldo Value isn't in the dictionary! Cleared Key/value pairs... Count of elements now = 0
সহজ আপডেট উদাহরণ
সহজে মান আপডেট করা:
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"]);
}
}
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
