Loading data from a txt file - C#

Question

...Continuation of this

Now I've created a text file with code... Now I just need to read the text i've written down in the .txt -how?

-thanks :)

EDIT: Fixed the link

link to my next question

Answer 1

Best Answer

Answer by Drakestar · Jul 05, 2012 at 02:16 PM

Your link doesn't seem to work.

Generally, you use a streamreader to load in text. Here's some code (untested) that should get you on the right track:

 using System.Text;
 using System.IO;  
 
 private bool Load(string fileName)
 {
     // Handle any problems that might arise when reading the text
     try
     {
         string line;
         // Create a new StreamReader, tell it which file to read and what encoding the file
         // was saved as
         StreamReader theReader = new StreamReader(fileName, Encoding.Default);

         // Immediately clean up the reader after this block of code is done.
         // You generally use the "using" statement for potentially memory-intensive objects
         // instead of relying on garbage collection.
         // (Do not confuse this with the using directive for namespace at the 
         // beginning of a class!)
         using (theReader)
         {
             // While there's lines left in the text file, do this:
             do
             {
                 line = theReader.ReadLine();
                     
                 if (line != null)
                 {
                     // Do whatever you need to do with the text line, it's a string now
                     // In this example, I split it into arguments based on comma
                     // deliniators, then send that array to DoStuff()
                     string[] entries = line.Split(',');
                     if (entries.Length > 0)
                         DoStuff(entries);
                 }
             }
             while (line != null);

             // Done reading, close the reader and return true to broadcast success    
             theReader.Close();
             return true;
             }
         }

         // If anything broke in the try block, we throw an exception with information
         // on what didn't work
         catch (Exception e)
         {
             Console.WriteLine("{0}\n", e.Message);
             return false;
         }
     }
 }

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ragnaros100 · Jul 05, 2012 at 02:33 PM 1

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Do I need to import a package to do this?... And Also. I dont understand how this code works... $$anonymous$$aybe some comments would be nice? :) Also. I fixed the link

Drakestar · Jul 05, 2012 at 03:03 PM 2

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Added some comments and namespaces. I think these are all the libraries used in the code.

ragnaros100 · Jul 05, 2012 at 03:11 PM 1

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So. Where do I specify the line and the text document? (Lets say I have my document in the "C:/$$anonymous$$yGame/data/file.txt" directory, and the code I need is on the 5th line in the document)

Drakestar · Jul 05, 2012 at 06:08 PM 2

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The file name is in the first argument of the StreamReader constructor. It's a string with the path and filename. The reader reads in line after line from the document - to act on the 5th line you could do many things: create an array of strings and add each line in the do/while loop, and then access array[4], or simply put a counter in the loop that detects when you're on line 5.

Drakestar · Jul 05, 2012 at 06:17 PM 3

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By the way, since you're now working with reading/writing text files and encodings, it's probably time to read this article: "The Absolute $$anonymous$$inimum Every Software $$anonymous$$bsolutely, Positively $$anonymous$$ust $$anonymous$$now About Unicode and Character Sets (No Excuses!)" http://www.joelonsoftware.com/articles/Unicode.html

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Answer 2

Answer by joncham · Jul 07, 2012 at 07:25 PM

Similar to the answer to the original question referenced, you could use the File.ReadAllText method:

 string text = System.IO.File.ReadAllText("myfile.txt");

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4ndro1d · Nov 21, 2013 at 11:25 AM 0

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This only works in Unity Editor but not on the targeted platforms

Answer 3

It's better do

      using (theReader)
      {
          line = theReader.ReadLine();

          if(line != null){
                  // While there's lines left in the text file, do this:
                  do
                  {
                         // Do whatever you need to do with the text line, it's a string now
                         // In this example, I split it into arguments based on comma
                         // deliniators, then send that array to DoStuff()
                         string[] entries = line.Split(',');
                         if (entries.Length > 0)
                         DoStuff(entries);

                         line = theReader.ReadLine();
                  }
                  while (line != null);
          } 
          // Done reading, close the reader and return true to broadcast success    
          theReader.Close();
          return true;
          }
    }

It uses an if less inside the do-while

Loading data from a txt file - C#

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