Input string was not in a correct format

I'm trying to create a calculator but this is giving this error when I'm going to save
FormatException: Input string was not in a correct format.
System.Number.ParseSingle (System.String value, System.Globalization.NumberStyles options, System.Globalization.NumberFormatInfo numfmt) (at <437ba245d8404784b9fbab9b439ac908>: 0)
System.Single.Parse (System.String s, System.Globalization.NumberStyles style, System.Globalization.NumberFormatInfo info) (at <437ba245d8404784b9fbab9b439ac908>: 0)
System.Single.Parse (System.String s) (at <437ba245d8404784b9fbab9b439ac908>: 0)
Calculadora.Update () (at Assets / Calculadora.cs: 54)

I already tried it in different ways and I couldn't solve it

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class Calculadora : MonoBehaviour
{
public InputField num1;
public InputField num2;
public InputField op;
public InputField SalvaResultado;
public Text salvo;
public Text output;
float resultado;
float salvar;

// Update is called once per frame
void Update()
{

if (Input.GetKeyDown("enter"))
{
switch (op.text)
{
case "+":
resultado = float.Parse(num1.text) + float.Parse(num2.text);
output.text = resultado.ToString();
break;

case "-":
resultado = float.Parse(num1.text) - float.Parse(num2.text);
output.text = resultado.ToString();
break;

case "*":
resultado = float.Parse(num1.text) * float.Parse(num2.text);
output.text = resultado.ToString();
break;


case "/":
resultado = float.Parse(num1.text) / float.Parse(num2.text);
output.text = resultado.ToString();
break;

default:
break;
}

}

if (Input.GetKeyDown("s"))
{
salvar = float.Parse(SalvaResultado.text);
salvo.text = salvar.ToString();
salvo.text = output.text;
}
}
}

 

Please use code tags when you post long bits of code.

Otherwise, the error is pretty clear. When you do a float.Parse call, the value you pass in has to be able to be converted to a float. So it's either your num1.text, num2.text, or SalvaResultado.text values that aren't in a format that can be changed. What values are you entering?

 

Everything that @Brathnann said above, plus if you like you can use the float.TryParse call if you expect invalid data.

https://docs.microsoft.com/en-us/dotnet/api/system.single.tryparse?view=netcore-3.1

float

is simply an alias for

System.Single

, which is a single-precision floating point number. You can write it with float:

Code (csharp):

1. float result = 0.0f;
2.  
3. string MyInputString = " ....";
4.  
5. if (float.TryParse( MyInputString, out result))
6. {
7.   // use your valid result here
8. }

 

Hey there,

I have to necro this, since I'm experiencing the same issue. It specifically happens when I'm trying to delete text inside a GUILayout.TextField in OnGUI(), which auto updates. It doesn't break anything, and automatically replaces the "invalid" argument with a valid number.

So I think this is an engine problem. It trys to parse something, that you took away from it.

Still I don't need that exception report, if the engine fixes itself.

 

I noticed I had this same issue when I switched from a standard Unity UI Input Field to a Text Mesh Pro Input Field.

That being said @Kurt-Dekker 's solution worked to fix my issue. Thank you very much