Question

Possible Duplicate:
Error message during calculation

int totalValue = 0;
    totalValue = int.Parse(Label9.Text) * int.Parse(Label6.Text);
    Label8.Text = totalValue.ToString();

Hi programmers. I can’t figure out why the above line isn’t working. The above line gives me a runtime error that says; Input string was not in a correct format.

Answer 1

as i posted in the other question as well, try to use int.tryParse() instead, if something goes wrong it just returns 0 instead of that exception

like this:

  int a;
  int b;
  int.TryParse("a",out a);
  int.TryParse("5",out b);
  int totalValue = a * b;
  Console.WriteLine(totalValue.ToString());

this code will write “0” to the console, because it cant parse “a” to a string

  int a;
  int b;
  int.TryParse("5",out a);
  int.TryParse("5",out b);
  int totalValue = a * b;
  Console.WriteLine(totalValue.ToString());

this code will write “25” to the console, because it can parse “5” to an integer number