Cannot clear the Input Field from Inspector

Question

Despite of hours of Googling but I'm still cannot figure out how to solve this problem

alt text

The problem is on the first Input Field where the number cannot be deleted when I press backspace, and I have to press backspace twice to empty the field, and on the first backspace press, it throws an Invalid Format error. I believe this has something to do with my input string format but I can't figure out why and how to fix it.

Below is the code I'm having problem with:

 public void GetFirstInput()
     {
         Calculate();
         s1 = float.Parse(a1.text, CultureInfo.InvariantCulture);
         Debug.Log(s1);
     }

Can anyone provide me some insights? Thanks.

Answer 1

Answer by Bunny83 · Sep 08, 2018 at 10:24 AM

You almost never want to use int.Parse, especially when the string comes from user data. In almost all cases you should use TryParse. TryParse returns a boolean if the parsing was successful or not. The actual parsed value is outputted to an out parameter. If the parsing fails the value is set to 0. If you want to avoid assigning 0 to your actual variable unless the user actually enters 0 you can use a temp variable like this:

 int tmp;
 if (int.TryParse(a1.text, NumberStyles.Integer, CultureInfo.InvariantCulture, out tmp))
     s1 = tmp;

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Cannot clear the Input Field from Inspector

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