.Net text calculator (formula parser)

Question

I am going to implement custom server side validation of numeric user input.

All is what I nee is to be able to feed a formula to the calculator, feed parameters and get the result back.

The formula consist of basic arithmetical operation, for example like this

([name1] + [name2] - [name3])*1.5

Then it should accept parameters like

calculator.AddParam("name1", 12);

And return the result of calculation like

var result = calculator.Calculate();

Does such libriary exist for .net?

You could just use IronScheme :) (Or IronPython/Ruby/etc) – leppie Sep 28 '11 at 18:08 — leppie, Sep 28 '11 at 18:08

score 2 · Accepted Answer · answered Sep 28 '11 at 18:06

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I've used Flee a couple times to do this pretty quickly and easily.

answered Sep 28 '11 at 18:06

Ron Warholic

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It's very well-written, very extensible, and evaluates >8'000'000 formulas/sec on my laptop. Recommended. – smirkingman Nov 22 '11 at 13:53

Carter Medlin · Answer 2 · 2011-09-28T20:13:48.637

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Try this

(C# compiling code at runtime)

http://www.codeproject.com/KB/recipes/matheval.aspx

edited Sep 28 '11 at 20:13

answered Sep 28 '11 at 18:04

Carter Medlin

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score 1 · Answer 3 · edited May 23 '17 at 11:55

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You could reuse the Javascript engine that comes with Windows, as explained here: parse and execute JS by C#

It's quite powerful, supports 32-bit and 64-bit architectures, and does not need to be documented, as everyone knows how to write some JS statemements :-)

edited May 23 '17 at 11:55

Community

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answered Sep 28 '11 at 18:26

Simon Mourier

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.Net text calculator (formula parser)

3 Answers3