How to convert string formula to a mathematical formula in C# [closed]

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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?

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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();

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Not sure why would you mention a compiler, but the simplest way will be to use a math expression evaluator, for example NCalc.

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You could add a reference to Microsoft Script Control Library (COM) and use code like this to evaluate an expression. (Also works for JScript.)

MSScriptControl.ScriptControl sc = new MSScriptControl.ScriptControl();
sc.Language = "VBScript";
string expression = "1 + 2 * 7";
object result = sc.Eval(expression);            
MessageBox.Show(result.ToString());