How to store one key and multiple values in a dictionary

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.NET3.5

Hi Friends,

I have a scenario where i need to have a dictionary with a string key and associated two string values like the below.
The key is in bold.
I am using Visual studio 2008,framework 3.5. and c#.

dictionary<string,string,string>

What I have tried:

I tried the following approach:

1. dictionary<string,object>..........where the object encapsulated my two required fields.
But i would have to incur extra casting overhead while fetching the values.

2.Someone suggested me to use

dictionary<string,list><string>>

but i guess the list is itself a collection of objects and will also involve the casting overhead.

So guys please help me out....
is there any datastructure in c# that can store multiple values as valuetypes?

Thanks
Varun

Posted 30-Sep-13 21:00pm

Member 9581909

Updated 16-May-22 6:56am

Maciej Los

v2

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Comments

Ravi Bhavnani 10-Apr-19 17:20pm

> is there any datastructure in c# that can store multiple values as valuetypes?

Yes. See Tuple to store 1-8 values.
https://www.tutorialsteacher.com/csharp/csharp-tuple

/ravi

2 solutions

Solution 5

Depending on situation, you can use at least several approaches, such as:
1. Dictionary<TKey, List<TValue>>
2. Dictionary<TKey, List<ComplexObject>>
3. Dictionary<TKey, Tuple<TValue1, TValue2>>
etc.

Based on MSDN documention[^], you can create a dictionary object to create relationship between file extensions and application which is able to open that extensions. For example:

C#

Dictionary<string, List<string>> openWith = 
            new Dictionary<string, List<string>>();

        // Add some elements to the dictionary. There are no 
        // duplicate keys, but some of the values are duplicates.
        openWith.Add("notepad.exe", new List<string>(){".txt", ".vbs", ".csv"});
        openWith.Add("winword.exe", new List<string>(){".txt", ".vbs", ".csv", ".htm", ".html", ".doc", ".docx", ".dot", ".dotx", ".docm", ".dotm"});
        //and so on...

Posted 10-Apr-19 10:42am

Maciej Los

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Fredrik Bornander · Accepted Answer · 2013-09-30T21:28:00

If you're lazy create a Dictionary of string and Tuple<string,string>.

C#

IDictionary<string, Tuple<string, string>> myDictionary = new Dictionary<string, Tuple<string, string>>();

If you're not lazy, create a class that holds your two strings (I'm going to call them Foo and Bar).

C#

public class MyOwnType {
   public string Foo { get; set; }
   public string Bar { get; set; }
   public MyOwnType(string foo, string bar) {
       Foo = foo;
       Bar = bar;
   }
}

C#

IDictionary<string, MyOwnType> myDictionary = new Dictionary<string, MyOwnType>();

Hope this helps,
Fredrik