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Issue

This Content is from Stack Overflow. Question asked by Andrea Mangialardo

I would like to convert (but i think it’s not possible) a string into a bool, in this way:

string a = "b.Contains('!')";

private void print(string condition)
{
   string b = "Have a nice day!";

   /* Some kind of conversion here for condition parameter */
   /* like bool.Parse(condition) or Bool.Convert(condition) */

   if(condition)
   {
      Console.Write("String contains !-character.");
   }
}

Mind that the bool-string has to be passed to the function as a parameter.

Is there a way to achieve this?

Solution

There is no built in way to parse your string to a expression.

But of your goal is to sent the expression to an other function you could do this

using System;

public class Program
{
    public static void Main()
    {       
        print(x=>x.Contains("!"));
    }
    
    private static void print(Func<string,bool> condition)
    {
       string b = "Have a nice day!";

       /* Some kind of conversion here for condition parameter */
       /* like bool.Parse(condition) or Bool.Convert(condition) */

       if(condition.Invoke(b))
       {
          Console.Write("String contains !-character.");
       }
    }
}

if you would like a non build in way you could look at : Is there a tool for parsing a string to create a C# func?

This Question was asked in StackOverflow by Andrea Mangialardo and Answered by Connor Stoop It is licensed under the terms of CC BY-SA 2.5. - CC BY-SA 3.0. - CC BY-SA 4.0.