Hello, I needed to resolve a string with an account (eg 2 + 2) in C # and return an integer (eg 4)
static void Main(string[] args)
{
string str = "2 + 2";
int resultado = Calcular(str);
Console.WriteLine("Resultado => {0}",resultado);
Console.ReadLine();
}
Any tips?
The NCalc library simplifies this for you. Install it from Nuget:
Install-Package ncalc
Then use it this way:
using NCalc;
using System;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
string str = "2 + 2";
var expressao = new Expression(str);
Console.WriteLine("Resultado => {0}", expressao.Evaluate());
Console.ReadLine();
}
}
}
I use the following function:
/// <summary>
/// Calcular Formulas
/// </summary>
/// <param name="evaluationString"></param>
/// <returns></returns>
public static string CalculateFormula(string evaluationString)
{
Microsoft.JScript.Vsa.VsaEngine en = Microsoft.JScript.Vsa.VsaEngine.CreateEngine();
Object result = Microsoft.JScript.Eval.JScriptEvaluate(evaluationString, en);
return result.ToString();
}