Open In App

C# | Dictionary.ContainsValue() Method

Last Updated : 01 Feb, 2019
Improve
Improve
Like Article
Like
Save
Share
Report

This method is used to check whether the Dictionary<TKey,TValue> contains a specific value or not.

Syntax:

public bool ContainsValue (TValue value);

Here, the value is the Value to locate in the Dictionary. The value can be null for reference types.

Return Value: This method returns true if the Dictionary contains an element with the specified value otherwise it returns false.

Below are the programs to illustrate the use of Dictionary<TKey,TValue>.ContainsValue() Method:

Example 1:




// C# code to check if a value 
// is present or not in a Dictionary.
using System;
using System.Collections.Generic;
  
class GFG {
  
    // Driver code
    public static void Main()
    {
  
        // Create a new dictionary of 
        // strings, with string keys.
        Dictionary<string, string> myDict = 
          new Dictionary<string, string>();
  
        // Adding key/value pairs in myDict
        myDict.Add("Australia", "Canberra");
        myDict.Add("Belgium", "Brussels");
        myDict.Add("Netherlands", "Amsterdam");
        myDict.Add("China", "Beijing");
        myDict.Add("Russia", "Moscow");
        myDict.Add("India", "New Delhi");
  
        // Checking the value "India" but 
        // here "India" is the key
        if (myDict.ContainsValue("India"))
            Console.WriteLine("Value : India is present.");
  
        else
            Console.WriteLine("Value : India is not present.");
    }
}


Output:

Value : India is not present.

Example 2:




// C# code to check if a value is
// present or not in a Dictionary.
using System;
using System.Collections.Generic;
  
class GFG {
  
    // Driver code
    public static void Main()
    {
  
        // Create a new dictionary of 
        // strings, with string keys.
        Dictionary<string, string> myDict = 
           new Dictionary<string, string>();
  
        // Adding key/value pairs in myDict
        myDict.Add("Australia", "Canberra");
        myDict.Add("Belgium", "Brussels");
        myDict.Add("Netherlands", "Amsterdam");
        myDict.Add("China", "Beijing");
        myDict.Add("Russia", "Moscow");
        myDict.Add("India", "New Delhi");
  
        // Checking for value Moscow
        if (myDict.ContainsValue("Moscow"))
            Console.WriteLine("Value : Moscow is present");
  
        else
            Console.WriteLine("Value : Moscow is absent");
    }
}


Output:

Value : Moscow is present

Reference:



Similar Reads

C# | SortedDictionary.ContainsValue() Method
This method is used to check whether the SortedDictionary&lt;TKey, TValue&gt; contains an element with the specified value or not. Syntax: public bool ContainsValue (TValue value); Here, the value is the Value to locate in the SortedDictionary. The value can be null for reference types. Return Value: This method returns true if the SortedDictionary
2 min read
C# | Dictionary.Add() Method
Dictionary&lt;TKey,TValue&gt;.Add() Method is used to add a specified key and value to the dictionary. Syntax: public void Add (TKey key, TValue value); Parameters: key: It is the key of the element to add. value: It is the value of the element to add. The value can be null for reference types. Exceptions: ArgumentNullException : If the key is null
3 min read
C# | Dictionary.ContainsKey() Method
This method is used to check whether the Dictionary&lt;TKey,TValue&gt; contains the specified key or not. Syntax: public bool ContainsKey (TKey key); Here, the key is the Key which is to be located in the Dictionary. Return Value: This method will return true if the Dictionary contains an element with the specified key otherwise, it returns false.
2 min read
C# | Dictionary.Remove Method
This method is used to remove the value with the specified key from the Dictionary&lt;TKey,TValue&gt;. Syntax: public bool Remove (TKey key); Return Value: This method returns true if the element is successfully found and removed; otherwise it returns false. This method returns false if key is not found in the Dictionary. Exception: This method wil
2 min read
C# | Dictionary.Clear Method
This method is used to remove all key/value pairs from the Dictionary&lt;TKey,TValue&gt;. Syntax: public void Clear (); Below are the programs to illustrate the use of above-discussed method: Example 1: // C# code to remove all pairs // from Dictionary using System; using System.Collections.Generic; class GFG { // Driver code public static void Mai
2 min read
C# | Dictionary.Item[] Property
This property is used to get or set the value associated with the specified key in the Dictionary. Syntax: public TValue this[TKey key] { get; set; } Here, key is the Key of the value to get or set. Property Value: It is the value associated with the specified key. If the specified key is not found, a get operation throws a KeyNotFoundException, an
2 min read
C# | Dictionary.Values Property
This property is used to get a collection containing the values in the Dictionary&lt;TKey,TValue&gt;. Syntax: public System.Collections.Generic.Dictionary&lt;TKey, TValue&gt;.KeyCollection Values{ get; } Return Value: This property returns a collection containing the Values in the Dictionary. Below are the programs to illustrate the use of Dictiona
2 min read
C# | Dictionary.Keys Property
This property is used to get a collection containing the keys in the Dictionary. Syntax: public System.Collections.Generic.Dictionary&lt;TKey, TValue&gt;.KeyCollection Keys { get; } Return Value : It returns a collection containing the keys in the Dictionary. Below are the programs to illustrate the use of above-discussed property: Example 1: // C#
2 min read
C# | Dictionary.Count Property
This property is used to get the number of key/value pairs contained in the Dictionary. Syntax: public int Count { get; } Return Value : The number of key/value pairs contained in the Dictionary. Below are the programs to illustrate the use of above-discussed property: Example 1: // C# code to count the number of // key/value pairs in Dictionary us
2 min read
C# | Get an enumerator that iterates through the Dictionary
Dictionary&lt;TKey, TValue&gt;.GetEnumerator method is used to return an enumerator that iterates through the Dictionary&lt;TKey, TValue&gt;. Syntax: public System.Collections.Generic.Dictionary&lt;TKey,TValue&gt;.Enumerator GetEnumerator (); Return Value: This method returns an Dictionary&lt;TKey, TValue&gt;.Enumerator structure for the Dictionary
3 min read