How to get the Sum of found values

Question

I want to find the elements which have the OverSized value == true and sum the BoxQuantity value of them. So far I can find the first element that has the OverSized value = true and returns the BoxQuantity value of it with the code below. Is there anyway to find all the elements that matches that condition and return sum of the box quantity values? (NOT THE SAME AS SUM AMOUNT QUESTION)

var boxNumBig = shippingSummary.ShippingBoxes.Find(item => item.OverSized == true);
int numofBigBox = boxNumBig.BoxQuantity;

You are not even using LINQ. Please read a basic tutorial before. — Camilo Terevinto, Dec 26 '18 at 18:34
This question is not the same as the other one you have marked as duplicate. I have read that question before asking and it doesnt have the condition part. My Question was how to get the sum of values returned by a condition — Evik Ghazarian, Dec 26 '18 at 19:25
Huh, are you **completely sure** it doesn't? Because I read this answer here: https://stackoverflow.com/a/26445009/2141621 in that same post — Camilo Terevinto, Dec 26 '18 at 19:29
the answer is! but not the question. duplicate questions and duplicate answers posted on different questions are not the same things. anyhow thanks for your attention. — Evik Ghazarian, Dec 26 '18 at 19:43
There, I added 2 more duplicates that ask exactly for filtering plus sum. — Camilo Terevinto, Dec 26 '18 at 19:46

Ousmane D. · Accepted Answer · 2018-12-26T18:36:13.073

1

Sure, you can:

var summation = shippingSummary.ShippingBoxes
                               .Where(item => item.OverSized)
                               .Sum(x => x.BoxQuantity);

This uses the Where extension method to retain all the objects where the OverSized is true and then uses the Sum method to take the summation.

edited Dec 26 '18 at 18:36

answered Dec 26 '18 at 18:34

Ousmane D.

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Close race. You just got me! – KidBilly Dec 26 '18 at 18:35
Thank You very much! However to the person marked this question as duplicate the other question doesn't have condition in it. – Evik Ghazarian Dec 26 '18 at 18:43

score 0 · Answer 2 · answered Dec 26 '18 at 18:34

0

.Find is not part of LINQ. It returns the first item in the list that it matches. I think you want to use .Where to find all of them.

answered Dec 26 '18 at 18:34

Daniel A. White

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How to get the Sum of found values

2 Answers2