Question

If I have a string variable with a formula:

string myformula = "3 * 5 + Pow(2,3)";

How can I convert this string to a mathematical formula that the compiler can calculate?

Answer 1

Finally I got the FLEE library for this purpose. The tool is free and perfectly fit for your purpose.
Below is an example how to use this library:

// Define the context of our expression
ExpressionContext context = new ExpressionContext();
// Allow the expression to use all static public methods of System.Math
context.Imports.AddType(typeof(Math));
// Define an int variable
context.Variables["a"] = 100;
// Create a dynamic expression that evaluates to an Object
IDynamicExpression eDynamic = context.CompileDynamic("sqrt(a) + pi");
// Evaluate the expressions
double result = (double)eDynamic.Evaluate();