How to Get the Dictionary Key by value in C# ?

Published on February 7, 2016 by abundantcode

Filed under C#

Last modified February 6, 2016

Print this page

rate 1 star rate 2 star rate 3 star rate 4 star rate 5 star
Your rating: none, Average: 0 (0 votes)

This article have been viewed 6204 times

If you want to get the Key of a dictionary based on the value in C# , you can use the LINQ’s where clause o FirstOrDefault method.

How to Get the Dictionary Key by value in C# ?

using System;
using System.Collections.Generic;
using System.Linq;

namespace ACCode
{
    class Program
    {
        static void Main(string[] args)
        {
            Dictionary<string, string> dictionaryItems= new Dictionary<string, string>()
            {
                {"1", "One"},
                {"2", "Two"},
                {"3", "Three"},
                {"4", "Three"},
                {"5", "Three"}
            };
            var dictValue = dictionaryItems.FirstOrDefault(x => x.Value == "Three").Key;
            Console.WriteLine(dictValue);
            Console.ReadLine();
        }       
    } 
}

Leave a Comment


x

You might be Interested in these Posts

C Program to convert lower case string to upper case

Problem Statement Write a program in C to convert the given string from lower case to upper case. ...

How to decode a base64 string in C#?

Here's a sample code snippet demonstrating how you can easily decode a base64 encoded string in C#. ...

How to disable editing of items in a combo box in c#?

When working in Win forms using C# and especially when you use the combo box , you would have notice...