Linq to entity group by error "attemp to divide by zero"?

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C#

let value2 = Grp.Count(x => x.Column1 <= 2 && x.Column2== "studentName") * 100 / Grp.Count(x => x.Column2== "studentName")

In this Statement some times the divider is Null so it pass NaN value how can I replace the divider from 0 to 1.

What I have tried:

let value2 = Grp.Count(x => x.Column1 <= 2 && x.Column2== "studentName") * 100 / Grp.Count(x => x.Column2== "studentName")

In this Statement some times the divider is Null so it pass NaN value how can I replace the divider from 0 to 1.

Posted 16-Mar-16 18:55pm

shaprpuff

Updated 16-Mar-16 22:18pm

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Sinisa Hajnal 17-Mar-16 5:56am

write it in two lines and check for 0. If you call first or default, you would get 0 again...maybe someone with more Linq mojo can find a workaround, but I think it would be better to write it in more lines.

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Sascha Lefèvre · Answer 1 · 2016-03-16T22:18:00

Solution 2

Either with an extension method like shown when following the link of solution 1 or like this:

C#

Math.Max(Grp.Count(x => x.Column2== "studentName"), 1)

Posted 16-Mar-16 22:18pm

Sascha Lefèvre

shaprpuff · Answer 2 · 2016-03-16T22:06:00

Solution 1

c# - Need to replace 0 with 1 in LINQ? - Stack Overflow[^]

Posted 16-Mar-16 22:06pm

shaprpuff