TryGetValue returns Null even though key exists

Akshay Jain

I'm using TryGetValue to get value from dictionary but the out value returns Null even though the key and value exisist in the dictionary.

Do anyone know about the issue?

4 Replies

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Ashutosh Gupta6y ago
can you sahre your code or may be you need to create dictionaly as case insentive by provide culture.ordinalignore case.
Jin Necesario6y ago
Hi Jenith,

Learning the concepts of C# dictionary is sometimes confusing, even me sometimes I get confused. I do suggest that you read a good article about dictionaries using C#. Just click this link: https://www.c-sharpcorner.com/article/dictionary-using-c-sharp-101/.

About your current issue, I think you need to make sure that your declaration of the dictionary is correct if the result is null. Or does it really exists in the first place?

Cheers,
Jin
Laxmidhar Sahoo6y ago
Hi

Bellow is the example
public static void dictionarydemo()
        {
            Dictionary<int, string> dict = new Dictionary<int, string>()
                                {
                                    {1,"One"},
                                    {2, "Two"},
                                    {3,"Three"}
                                };

            string result;

            if (dict.TryGetValue(4, out result))
            {
                Console.WriteLine(result);
            }
            else
            {
                Console.WriteLine("Could not find the specified key.");
            }
            if (dict.TryGetValue(3, out result))
            {
                Console.WriteLine(result);
            }
            else
            {
                Console.WriteLine("Could not find the specified key.");
            }
        }
Thanks and regards
Jenith Thakkar6y ago
Please provide code