Help me about reading .TXT File

Question

Hi there i have one TXT hile and i wanna use it as one word with one number. Text file...

 Character / 0934
 US / 0424
 Seoul / 0426
 etc...

and i wanna read one line such as "seoul, 0426"

Answer 1

Best Answer

Answer by Eric5h5 · Mar 05, 2010 at 01:28 PM

Use the System.IO classes, such as StreamReader:

 import System.IO;
 var fileName = "foo.txt";
 
 function Start () {
     var sr = new StreamReader(Application.dataPath + "/" + fileName);
     var fileContents = sr.ReadToEnd();
     sr.Close();
 
     var lines = fileContents.Split("\n"[0]);
     for (line in lines) {
         print (line);
     }
 }

This reads in the contents of the named text file and splits into separate strings on the newline char.

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Eric5h5 · Mar 08, 2010 at 05:35 AM 0

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The "var lines = fileContents.Split("\n"[0]);" line results in a string array, so "lines[134]" would be the 135th line. You can use Split again to split the line into separate elements.

Eric5h5 · Mar 08, 2010 at 03:50 PM 0

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"lines" is a string array...you can't Split a string array, only individual strings. So you'd use "var lineElements = lines[x].Split("/"[0]);", where x is the line number you want to split.

bernardfrancois · Mar 09, 2011 at 01:18 PM 0

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For iPhone and Android, you need to use the correct file path.

I just made a blog post explaining how to obtain a valid file path in a platform-independent way (working on both PC, $$anonymous$$ac, iOS and Android):

http://www.previewlabs.com/file-io-in-unity3d/

SmartyP · Feb 05, 2015 at 08:55 PM 0

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Normally in .Net you should use System.IO's Path.Combine() to combine folder and filenames versus directly working with '\' and '/' symbols.

ex: string fullPath = Path.Combine(Application.dataPath, filename);

Answer 2

Answer by fireDude67 · Dec 30, 2010 at 05:16 AM

You can use the Unity Text Asset class, and then use a regex to split it.

Simply do this...

 public TextAsset dictionaryTextFile;

and then literally drop your text file in to the project. It would be called something.txt. In the example it is called yourTextFIle.txt...

alt text

To convert a TextAsset to one long string, is completely trivial.

You just go .text. That's all there is to it.

That's exactly the reason we all use Unity, rather than actually bothering programming.

You then just convert that one long string to a List<> of strings.

So, in your code, simply do this:

 public TextAsset dictionaryTextFile;
 private string theWholeFileAsOneLongString;
 private List<string> eachLine;
 
 void Start()
     {
     theWholeFileAsOneLongString = dictionaryTextFile.text;
     
     eachLine = new List<string>();
     eachLine.AddRange(
                 theWholeFileAsOneLongString.Split("\n"[0]) );
     
     // you're done.
     
     Debug.Log(eachLine[4]);
     Debug.Log(eachLine[10]);
     Debug.Log(eachLine[101]);
     Debug.Log(eachLine[0]);
     int kWords = eachLine.Count;
     Debug.Log(eachLine[kWords-1]);
     }

AddRange and .Split("\n"[0]) are just methods to easily convert a long string which is separated by newlines, to, a List<> of words.

Fortunately it's that easy.

a.png (47.5 kB)

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Alex1002 · May 23, 2016 at 02:57 PM 0

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How to write file?

CrowaL · May 30, 2018 at 04:58 AM 0

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@fireDude67 Thank you good sir! After 8 years, this still works great!

Answer 3

Answer by StephanK · Mar 05, 2010 at 01:09 PM

You can use the standard c# file api.
If you want to run it in the webplayer or you are using javascript you could use the WWW class to do this.

var pathToFile = "path/to/example.txt"; var url = "file://" + pathToFile; yiel download = new WWW(url);

text = download.data;

pathToFile needs to be a complete path. You could also use a path relative to your unity project. Then you'd have to do this to run in the editor:

var url = "file://" + Application.dataPath + "/../" + pathToFile;

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Eric5h5 · Mar 05, 2010 at 01:32 PM 1

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There is no "C# file api". There is only the .NET file API, which works perfectly fine in Javascript or Boo. Also, "file://" doesn't work in the webplayer.

StephanK · Mar 05, 2010 at 09:55 PM 0

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I meant .NET, sorry for being vague. As I don't use javascript or Visual Basic C# and .NET are pretty much the same to me. However you are right, C# is not .NET. "file://" won't work in the web player use "http://" ins$$anonymous$$d. Would StreamReader and Application.dataPath work in a WebPlayer context?

Eric5h5 · Mar 08, 2010 at 05:37 AM 1

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StreamReader doesn't work in the web player, and dataPath returns the absolute URL of the unity file in that case.

Answer 4

Answer by DeveloperJake · Dec 01, 2021 at 05:18 PM

How exactly would we open the file?

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Pangamini · Dec 01, 2021 at 05:33 PM 0

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I'd say that this is an entirely .net / C# question

Help me about reading .TXT File

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