C# | Check whether a SortedList object contains a specific key
SortedList.Contains(Object) Method is used to check whether a SortedList object contains a specific key.
Syntax:
public virtual bool Contains (object key);
Here, key is the Key which is to be located in the SortedList object.
Return Value: This method returns the true if the SortedList object contains an element with the specified key otherwise, it returns false
Exceptions:
- ArgumentNullException: If the key is null.
- InvalidOperationException: If the comparer throws an exception.
Below programs illustrate the use of above-discussed method:
Example 1:
// C# code to Check whether a SortedList // object contains a specific key using System; using System.Collections; class Beginner { // 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#" ); // Checking whether 4 is present // in SortedList or not Console.Write(mylist.Contains( "4" )); } } |
Output:
True
Example 2:
// C# code to Check whether a SortedList // object contains a specific key using System; using System.Collections; class Beginner { // 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" ); // Checking whether 10 is present // in SortedList object or not Console.Write(mylist.Contains( "Sixth" )); } } |
Output:
False
Note:
- Contains implements
IDictionary.Contains
. It behaves exactly as ContainsKey. - This method uses a binary search algorithm; therefore, this method is an O(log n) operation, where n is Count.
Reference:
- https://docs.microsoft.com/en-us/dotnet/api/system.collections.sortedlist.contains?view=netframework-4.7.2
Contact Us