StreamReader and StreamWriter don't work at the same time in the build project

Questions & Answers
1

Good Morning to everybody. I’m using StreamReader and StreamWriter in a c# script to read/write on a txt file (the file is situated in the same folder where I’ll create the project build, therefore outside Project_data). Before the build, StreamReader and StreamWriter work both correctly and read/write on the file. I’ve tried to debug the script on Unity. Every instruction is executed correctly. When I create the build project, it works only StreamWriter or StreamReader. I’ve tried to use File.WriteAllText and File.ReadAllText, but I found the same problem. I have no idea how to fix the issue.
I have no error message returned because the code is correctly executed in Unity.
Only StreamReader works when I create a build project.
This is the code that I use to read/write on the file:

using UnityEngine;
using System.Collections;
using System.Diagnostics;
using System.IO;
using System;
using System.Text;


public class Countdown : MonoBehaviour {
    //Create a timer of 180s
    float timeRemaining = 180;
    //Get informations from the current process
    Process currentProcess = Process.GetCurrentProcess(); 


    //Number of objects to show
    int n_cues = 0;
    //Arguments imported
    string arguments_string;
    //Array to read/write arguments
    char[] n_cues_argument_char = new char[2];

    StreamReader sr;
    StreamWriter sw;

    // Use this for initialization
    void Start() {

        /* Reading of the file*/
        try
        {
            sr = new StreamReader("C:\\Users\\LaptopLab\\Desktop\\Scene\\arguments.txt");

            arguments_string = Convert.ToString(sr.ReadLine());
            sr.Close();

            arguments_string.CopyTo(0, n_cues_argument_char, 0, arguments_string.Length);
            n_cues = Convert.ToInt32(n_cues_argument_char[1].ToString());
        
        }
        catch (Exception e)
        {
            Console.WriteLine("Exception: " + e.Message);
        }

       

    }

    // Update is called once per frame
    void Update() {
        timeRemaining -= Time.deltaTime;
    }

    void OnGUI()
    {
        //While timer is not zero, view current timer value on UI
        if (timeRemaining > 0)
        {
            GUI.Label(new Rect(100, 100, 200, 100), "Time Remaining : " + (int)timeRemaining);
            GUI.Label(new Rect(100, 120, 200, 100), "N_Cues: " + n_cues);
            GUI.Label(new Rect(100, 160, 200, 100), "Arguments_Readed : " + arguments_string);
        }
        else
        {
            //Update n_cues
            if (n_cues == 5)
                n_cues = 1;
            else
                n_cues++;

            //Update array of characters with the arguments modified 
            n_cues_argument_char[0] = n_cues_argument_char[0];
            n_cues_argument_char[1] = Convert.ToChar(n_cues.ToString());


            /* Write a word on the file */ 
            try
            {
                sw = new StreamWriter("C:\\Users\\LaptopLab\\Desktop\\Scene\\arguments.txt");
                arguments_string = new string(n_cues_argument_char);

                sw.WriteLine(n_cues_argument_char);
                sw.Close();

            }
            catch (Exception e)
            {
                Console.WriteLine("exception: " + e.Message);
            }

            finally
            {
                Console.WriteLine("executing finally block 2");
            }

            //Close the current process
            currentProcess.Kill();
      
        }
    }
}

Thanks for your help!

2

Hi, tidied your code up a bit - don’t see why it shouldn’t work now as long as the file exists to begin with.

using UnityEngine;
using System.Collections;
using System.Diagnostics;
using System.IO;
using System;
using System.Text;
 
public class Countdown : MonoBehaviour 
{
	float timeRemaining = 180;
	int n_cues = 0;
	string arguments_string;
	
	Process currentProcess = Process.GetCurrentProcess(); 

	void Start() 
	{
		try
		{
			using(StreamReader sr = new StreamReader("C:\\Users\\LaptopLab\\Desktop\\Scene\\arguments.txt"))
			{
				arguments_string = Convert.ToString(sr.ReadLine());	
				n_cues = Convert.ToInt32(arguments_string[1]);
			}
		}
		catch (Exception e)
		{
			Console.WriteLine("Exception: " + e.Message);
		}
	}

	void Update() 
	{
		timeRemaining -= Time.deltaTime;
	}

    void OnGUI()
	{
		if (timeRemaining > 0)
		{
			GUI.Label(new Rect(100, 100, 200, 100), "Time Remaining : " + (int)timeRemaining);
			GUI.Label(new Rect(100, 120, 200, 100), "N_Cues: " + n_cues);
			GUI.Label(new Rect(100, 160, 200, 100), "Arguments_Readed : " + arguments_string);
		}
		else
		{
			if (n_cues == 5)
				n_cues = 1;
			else
			   n_cues++;

			arguments_string = arguments_string[0] + n_cues.ToString();

			try
			{
				using(StreamWriter sw = new StreamWriter("C:\\Users\\LaptopLab\\Desktop\\Scene\\arguments.txt"))
				{
					sw.WriteLine(arguments_string);
				}
			}
			catch (Exception e)
			{
				Console.WriteLine("exception: " + e.Message);
			}

			currentProcess.Kill();	   
		}
    }
}