Creating a statistics during a for loop

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Hey guys,

Ok so i wasn't sure what to put as a title for this one.

Basically i am looping through a List of a type, each of these types has a username value in it and i want to get a count of each of these usernames as i go through. But the amount of and value of these usernames is unknown and can change. After the loop i want to display the username alongside a count of its occurrence.

What is the best approach to accomplish this?

Regards
Carl

Posted 3-Jul-14 22:32pm

Carl Mailey

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3 solutions

Solution 1

Learn to DIY from here[^]

Posted 3-Jul-14 22:48pm

Peter Leow

Solution 2

Use a Dictionary<string,>.
If the string exists in the Dictionary then increment the int value. On the other hand, if the string doesn't yet exist, then create the entry in the Dictionary and set its int value to 1.

Posted 3-Jul-14 22:57pm

CPallini

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Marcin Kozub · Accepted Answer · 2014-07-03T23:07:00

Solution 3

I think that you can use LINQ and GroupBy. Look at examples here:

http://code.msdn.microsoft.com/101-LINQ-Samples-3fb9811b[^]

Especially section Aggregate Operators - Count grouped

I hope it help you :)

Posted 3-Jul-14 23:07pm

Marcin Kozub

Comments

Carl Mailey 4-Jul-14 6:32am

Thanks this is exactly what i wanted.

Marcin Kozub 4-Jul-14 6:35am

Glad I could help you :D