Convert txt file contents to variable

Unity Engine
1

I am trying to write a script which reads a number written in a txt file, then reacts a different way depending on what it finds there.

Using these two scripts :

…I have come up with his code.

    import System.IO;
    var fileName = "writetest.txt";
    var number1 : String;
    
    
     
    function Start () {
    var sr = new StreamReader(Application.dataPath + "/" + fileName);
    var fileContents = sr.ReadToEnd();
    sr.Close();
       
    var lines = fileContents.Split("\n"[0]);
    number1 = lines[0];    
      }

    
        function Update() {


            if (number1 == 1){
            {
            Debug.Log("Positive");
            }
            
            
            if (number1 == 0){
            {
            Debug.Log("Negative");
            }
           
         }
       }
     }

The txt file currently has a single 0 in it, so I’m trying to get the debug log to say “Negative”.

However, nothing happens in game.

What have I done wrong?

2

What error message did you get in the console?

Hint: A string that has the value “0” is not the same thing as the number 0. See http://forum.unity3d.com/threads/58867-Convert-String-to-Int-in-C

3

Does your value of number1 come up null or zero in the inspector. If its null try

(eg) if((number1==0) || (number1==null)) { }

(Tip) variables shouldn’t end with numbers in its name. Try something like this - (eg) number0A, or number1A. If you have to parse your value in the future you may get some errors.

4

There is no error message in the console. It simply does not do anything (neither “positive” or “negative” is displayed).

I’m afraid I don’t quite understand your hint.

Are you saying that what is read from the text file is not really a 0, or at least not understood in the same way? Metaphorically, it’s more like the word zero rather than a number?

It is null (empty). I tried your suggestion, but the effect was no different.

5 
if (number1 == "1"){
{
   Debug.Log("Positive");
}

if (number1 == "0"){
{
   Debug.Log("Negative");
}
6

This.

http://www.dotnetperls.com/int-parse

7

Hi,
let us say the datas in the File i like:
234; 2938; 5657; 5735; ; 45; 2; and so on…

  1. You should take the StreamReader() like
    content = new StreamReader( Application.dataPath + Filename));

  2. var filedatas = content.ReadToEnd();

  3. SpltDatas = filedatas.Split(“;”[0]);

  4. Convert it to FLOAT or INT
    Float with parseFloat()

Maybe this helps?

8

Thank you! This solved it.

Here’s the full code with your update, for anyone who has similar problems :

    import System.IO;
    var fileName = "writetest.txt";
    var number1 : String;

    
    
     
    function Start () {
       
    
    var sr = new StreamReader(Application.dataPath + "/" + fileName);
    var fileContents = sr.ReadToEnd();
    sr.Close();
       
    var lines = fileContents.Split("\n"[0]);
    number1 = lines[1];    
      }

    
        function Update() {

    //check reads number of second line
    if (number1 == "1"){
    {
       Debug.Log("Positive");
    }
    }
     
    if (number1 == "0"){
    {
       Debug.Log("Negative");
    }

}
}

9

If you are treating a string as a number it would be more logical to use parseInt to convert it:
var n = parseInt(number1);
if(n == 1) Debug.Log(“positive”);

You’re going to run across situations where you need the actual value, so it would be better to get used to it.