c# convert string expression to a boolean expression [closed]

Answer 1

If you're dealing with relatively simple mathematical expressions then a straightforward implementation of the shunting-yard algorithm should do the trick.

Answer 2

You could take a look at JINT (Javascript Interpreter for .NET) http://jint.codeplex.com/

Answer 3

I would use Irony, the .NET language kit. You could construct a simple grammar with Irony and then parse the string into executable command. There's a decent example of an arthmetic grammar in this tutorial and in the Expression Grammar Sample, its a pretty common request ;)

I definitely suggest using a proper compiler as opposed to Regex or a roll your own approach - it will be much more extensible if you ever want to add more rules.

Answer 4

Take a look at my library, Proviant. It's a .NET Standard library using the Shunting Yard algorithm to evaluate boolean expressions. You could also implement your own grammar.

Answer 5

Have a look at Flee (Fast Lightweight Expression Evaluator) on CodePlex.

Answer 6

If it follows all C# expression rules then compile it as dynamic code as per http://www.west-wind.com/presentations/dynamiccode/dynamiccode.htm