CODEWITHSUNDEEP
c#c#-4.0
Saravanan
Saravanan

Reputation: 11612

How to store key/value pair in C#(4.0)?

I would like to know how to Store Key/Value Pair in C# 4.0?

For example, in Java HashTable or HashMap used to store key/value pairs.. But How i do it in C#?

Upvotes: 8

Views: 48742

Answers (4)

Rudi Visser
Rudi Visser

Reputation: 22019

You can use the Hashtable class, or a Dictionary<TKey, TValue> if you know the specific types that you're storing.

Example:

// Loose-Type
Hashtable hashTable = new Hashtable();
hashTable.Add("key", "value");
hashTable.Add("int value", 2);
// ...
foreach (DictionaryEntry dictionaryEntry in hashTable) {
    Console.WriteLine("{0} -> {1}", dictionaryEntry.Key, dictionaryEntry.Value);
}

// Strong-Type
Dictionary<string, int> intMap = new Dictionary<string, int>();
intMap.Add("One", 1);
intMap.Add("Two", 2);
// ..
foreach (KeyValuePair<string, int> keyValue in intMap) {
    Console.WriteLine("{0} -> {1}", keyValue.Key, keyValue.Value);
}

Upvotes: 26

npinti
npinti

Reputation: 52195

You can check the Dictionary data structure, using string for the key type and whatever you data's type is for the value type (possibly object if multiple types of data items).

Upvotes: 2

corlettk
corlettk

Reputation: 13574

Saravanan

Java Map equals C# Dictionary (more or less)... and you'll want the generics version, of course.

This (at a quick glance) looks like a decent example. http://www.dotnetperls.com/dictionary-lookup

Also you might want to take a geezer at: http://www.25hoursaday.com/CsharpVsJava.html ... I've found it to be extremely helpful with getting up-to-speed in C#.

Cheers. Keith.

Upvotes: 1

Kevin
Kevin

Reputation: 570

You can use Dictionary in c# see examples at http://www.dotnetperls.com/dictionary-keys

Upvotes: 1

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