Open In App

C# | Getting the list of keys of a SortedList object

Last Updated : 01 Feb, 2019
Comments
Improve
Suggest changes
Like Article
Like
Report
SortedList.GetKeyList Method is used to get the list of keys in a SortedList object. Syntax:
public virtual System.Collections.IList GetKeyList ();
Return Value: It returns an IList object containing the keys in the SortedList object. Below programs illustrate the use of above-discussed method: Example 1: CSharp
// C# code for getting the keys
// in a SortedList object
using System;
using System.Collections;

class Geeks {

    // Main Method
    public static void Main(String[] args)
    {

        // Creating a SortedList of integers
        SortedList mylist = new SortedList();

        // Adding elements to SortedList
        mylist.Add("1", "C++");
        mylist.Add("2", "Java");
        mylist.Add("3", "DSA");
        mylist.Add("4", "Python");
        mylist.Add("5", "C#");

        // taking an IList and
        // using GetKeyList method
        IList klist = mylist.GetKeyList();

        // Prints the list of keys
        Console.WriteLine("Key List");

        for (int i = 0; i < mylist.Count; i++)
            Console.WriteLine(klist[i]);
    }
}
Output:
Key List
1
2
3
4
5
Example 2: CSharp
// C# code for getting the keys
// in a SortedList object
using System;
using System.Collections;

class Geeks {

    // Main Method
    public static void Main(String[] args)
    {

        // Creating a SortedList of integers
        SortedList mylist = new SortedList();

        // Adding elements to SortedList
        mylist.Add("First", "Ram");
        mylist.Add("Second", "Shyam");
        mylist.Add("Third", "Mohit");
        mylist.Add("Fourth", "Rohit");
        mylist.Add("Fifth", "Manish");

        // taking an IList and
        // using GetKeyList method
        IList klist = mylist.GetKeyList();

        // Prints the list of keys
        Console.WriteLine("Key List");

        // will print the keys in sorted order
        for (int i = 0; i < mylist.Count; i++)
            Console.WriteLine(klist[i]);
    }
}
Output:
Key List
Fifth
First
Fourth
Second
Third
Note:
  • The returned IList object is a read-only view of the keys of the SortedList object. Modifications made to the underlying SortedList are immediately reflected in the IList.
  • The elements of the returned IList are sorted in the same order as the keys of the SortedList.
  • This method is similar to the Keys property but returns an IList object instead of an ICollection object.
  • This method is an O(1) operation.
Reference:

Next Article

Similar Reads