how to compute huge arithmetic string expression in c#

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Hi every one I want to compute some formula but when i using

C#

object Result = new DataTable().Compute(Formul, string.Empty);

for example this formula (-1163142499 - 281259084 - 4700000 - 848996756)
i get this message which the number is too large or to small for int32 how can i use this
methods by larger data types.
thanks.

Posted 3-Jul-14 21:00pm

MohsenGolmehr

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[no name] 4-Jul-14 3:05am

You can use Int64

[no name] 4-Jul-14 3:21am

BigInteger

2 solutions

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OriginalGriff · Accepted Answer · 2014-07-03T21:27:00

Solution 2

Why are you trying to use DataTable.Compute as an expression evaluator?
Why not use an actual expression evaluator?

There are Loads of them on this site alone, that you can use, or modify to fit your needs:
Google List for Codeproject[^]
The top two are good (though the first is rather old):
Runtime C# Expression Evaluator[^]
A Tiny Expression Evaluator[^]

Posted 3-Jul-14 21:27pm

OriginalGriff

Comments

MohsenGolmehr 5-Jul-14 0:42am

Hi Thanks for your answers.
the reason i am using this method is i do not want use complex solution for a simple problem
because i have lots of complex problem on this application and calculating is not much complexer than example it is just (Plus , Mines , Parenthesis , Multiplication ,Divide)

MohsenGolmehr · Accepted Answer · 2014-07-04T18:50:00

I Tried so many test on Sql server And I found this
when I write this Command

SQL

SELECT SUM(-1163142499 - 281259084 - 4700000 - 848996756)

I get this error

Msg 8115, Level 16, State 2, Line 1
Arithmetic overflow error converting expression to data type int.

And then I write this

SQL

SELECT SUM(10000000000000000000000 + -1163142499 - 281259084 - 4700000 - 848996756) AS Res

Res = 9999999999997701901661

I get Answer But I must Reduce it by (10000000000000000000000)

I dont know whats going on but it solved My problem.

Thanks you All.