Działanie w stringu

Question

Dzień dobry,

czy jest jakiś prosty sposób na obliczenie działania typu (2+2)*2 znajdującego się w zmiennej string w języku c#?

Dzięki za pomoc.

 

EDIT:

Próbowałem już konwertować string na int'a, jednak wyskakuje wyjątek.

System.FormatException: „Nieprawidłowy format ciągu wejściowego.”

        string calculation;

        public void UpdateSum()
        {
            lb_sum.Content = calculation;
        }

        private void lb_0_MouseUp(object sender, MouseButtonEventArgs e)
        {
            calculation = calculation + "0";
            UpdateSum();
        }

        private void lb_1_MouseUp(object sender, MouseButtonEventArgs e)
        {
            calculation = calculation + "1";
            UpdateSum();
        }

        private void lb_2_MouseUp(object sender, MouseButtonEventArgs e)
        {
            calculation = calculation + "2";
            UpdateSum();
        }

        private void lb_3_MouseUp(object sender, MouseButtonEventArgs e)
        {
            calculation = calculation + "3";
            UpdateSum();
        }

        private void lb_4_MouseUp(object sender, MouseButtonEventArgs e)
        {
            calculation = calculation + "4";
            UpdateSum();
        }

        private void lb_5_MouseUp(object sender, MouseButtonEventArgs e)
        {
            calculation = calculation + "5";
            UpdateSum();
        }

        private void lb_6_MouseUp(object sender, MouseButtonEventArgs e)
        {
            calculation = calculation + "6";
            UpdateSum();
        }

        private void lb_7_MouseUp(object sender, MouseButtonEventArgs e)
        {
            calculation = calculation + "7";
            UpdateSum();
        }

        private void lb_8_MouseUp(object sender, MouseButtonEventArgs e)
        {
            calculation = calculation + "8";
            UpdateSum();
        }

        private void lb_9_MouseUp(object sender, MouseButtonEventArgs e)
        {
            calculation = calculation + "9";
            UpdateSum();
        }

        private void lb_addition_MouseUp(object sender, MouseButtonEventArgs e)
        {
            calculation = calculation + "+";
            UpdateSum();
        }

        private void lb_subtra_MouseUp(object sender, MouseButtonEventArgs e)
        {
            calculation = calculation + "-";
            UpdateSum();
        }

        private void lb_multiplication_MouseUp(object sender, MouseButtonEventArgs e)
        {
            calculation = calculation + "*";
            UpdateSum();
        }

        private void lb_division_MouseUp(object sender, MouseButtonEventArgs e)
        {
            calculation = calculation + "/";
            UpdateSum();
        }

        private void lb_bracket1_MouseUp(object sender, MouseButtonEventArgs e)
        {
            calculation = calculation + "(";
            UpdateSum();
        }

        private void lb_bracket2_MouseUp(object sender, MouseButtonEventArgs e)
        {
            calculation = calculation + ")";
            UpdateSum();
        }

        private void lb_equal_MouseUp(object sender, MouseButtonEventArgs e)
        {
            int res = Convert.ToInt32(calculation);
            calculation = Convert.ToString(res);
            UpdateSum();
        }

        private void lb_c_MouseUp(object sender, MouseButtonEventArgs e)
        {
            calculation = "";
            UpdateSum();
        }

        private void lb_back_MouseUp(object sender, MouseButtonEventArgs e)
        {
            if (calculation != "")
                calculation = calculation.Remove(calculation.Length - 1);
            UpdateSum();

        }

EDIT2:

Znalazłem rozwiązanie na stackoverflow (nie widziałem tego przed napisaniem posta). LINK DO STACK OVERFLOW

Przepraszam za spam na forum. Temat zamykam.

Answer 1

https://stackoverflow.com/questions/1019793/how-can-i-convert-string-to-int

;)

Comments

albo w google

C# string to int

---

Już próbowałem.

System.FormatException: „Nieprawidłowy format ciągu wejściowego.”

Wstawić kod źródłowy?