String[] to int[]

Question

I use Visual Studio 8.7.9, Unity 2019.3.13f1

When I try to convert string[] to int[],

string score = reader.ReadToEnd();
string[] scores = score.Split('\n');
int[] scoreSorter = new int[scores.Length + 1];
for(int i =0; i <scores.Length; i++)
{
    scoreSorter[i] = Convert.ToInt32(scores[i]);
    
    foreach(var s in scoreSorter)
    {
        Array.Sort(scoreSorter);
        Debug.Log(s);
        highScore.text = "Рекорды: \n" + scoreSorter[0] + "\n" + scoreSorter[1] + "\n" + scoreSorter[2] + "\n" + scoreSorter[3];
    }
    
}

I get this error in my unity console:

FormatException: Input string was not in a correct format. System.Number.StringToNumber (System.String str, System.Globalization.NumberStyles options, System.Number+NumberBuffer& number, System.Globalization.NumberFormatInfo info, System.Boolean parseDecimal) (at <437ba245d8404784b9fbab9b439ac908>:0) System.Number.ParseInt32 (System.String s, System.Globalization.NumberStyles style, System.Globalization.NumberFormatInfo info) (at <437ba245d8404784b9fbab9b439ac908>:0) System.Int32.Parse (System.String s, System.IFormatProvider provider) (at <437ba245d8404784b9fbab9b439ac908>:0) System.Convert.ToInt32 (System.String value) (at <437ba245d8404784b9fbab9b439ac908>:0) ButtonAction.ButtonClickHighScore () (at Assets/Scripts/UI/ButtonAction.cs:73)

My aim is to get each number in array, sort them and display on the scoreboard. Any help will be appreciated!

The error happens when some input value cannot be converted to an integer in the call to Convert.ToInt32. I suggest to add a _Debug.Log(scores[i])_ just before the convert line. So you will know which text is causing problems. — Steve, Nov 16 '20 at 14:09
Please log elements from scores array or use debugger to understand which values it contains. — Dmitry Grebennikov, Nov 16 '20 at 14:13
Perhaps try TryParse instead, use the debugger to step through the problem, and finally: Try using .Trim() to ensure there are no leading or trailing `" "`. — Austin T French, Nov 16 '20 at 14:13
Instead of `\n` try `Environment.NewLine` or try to split on all newline formats `string[] lines = theText.Split( new[] { "\r\n", "\r", "\n" }, StringSplitOptions.None );` - see here: https://stackoverflow.com/questions/1547476/easiest-way-to-split-a-string-on-newlines-in-net — Rand Random, Nov 16 '20 at 14:13
https://ericlippert.com/2014/03/05/how-to-debug-small-programs/ — SomeBody, Nov 16 '20 at 14:26

score 1 · Accepted Answer · edited Nov 16 '20 at 14:49

1

You probably have a newline character at the end of the input.

Change this line:

string[] scores = score.Split('\n');

To this:

string[] scores = score.Split(new char[] {'\n'}, StringSplitOptions.RemoveEmptyEntries);

edited Nov 16 '20 at 14:49

Uwe Keim

39,551
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answered Nov 16 '20 at 14:21

JesseChunn

555
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3

Or just File.ReadAllLines – Steve Nov 16 '20 at 14:22

score 0 · Answer 2 · answered Nov 16 '20 at 14:03

0

One of the strings was not a valid integer. Find out what string it is and fix it.

answered Nov 16 '20 at 14:03

Strikegently

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I use .txt file to save data. Here is the example of when it gives me error. When I fill it with different numbers, the same mistake. https://drive.google.com/file/d/1Q6xmcMlJNBpO2ukZTkJyjoINzyMqITp5/view?usp=sharing – Tim Markin Nov 16 '20 at 14:07

String[] to int[]

2 Answers2