Read text from file and show it on GUI

I want to make a script that reads random line from a .txt file and shows it on a screen. I found some solutions, but not for Unity, but as a C# standard.

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3. using System.IO;
4. using UnityEngine.UI;
5.  
6. public class TextReadFromFile : MonoBehaviour {
7.  
8.     public TextReader quotes;
9.     Text text;
10.     public string textFromFile;
11.  
12.  
13.     void Awake()
14.     {
15.         text = GetComponent <Text>();
16.     }
17.  
18.     void Update()
19.     {
20.         text.text = "Sentence::: " + textFromFile;
21.           }
22.     private void ReadFromFile()
23.     {
24.         string[] allLines = File.ReadAllLines("quotes.txt");
25.         Random rnd1 = new Random();
26.         return allLines[rnd1.Next(allLines.Length)];
27.         textFromFile = allLines;
28.  
29.     }
30. }

There are multiple errors, but first of all, there is a problem with "return allLines[rnd1.Next(allLines.Length)];".
Have anybody had the same problem?

 

the UnityEngine version of Random doesn't have a Next function. If you want the system one, you'll need to change it to 'System.Random'

 

Thanks for that.
Can you tell me, where is the Unity looking for my file? Also, what should be the type of my textFromFile file in code?

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3. using System.IO;
4. using UnityEngine.UI;
5.  
6. public class TextReadFromFile : MonoBehaviour {
7.  
8.     public TextReader quotes;
9.     Text text;
10.     public string textFromFile;          //there should be something else
11.  
12.  
13.     void Awake()
14.     {
15.         text = GetComponent <Text>();
16.     }
17.  
18.     void Update()
19.     {
20.         text.text = "Napis::: " + textFromFile;
21.         }
22.  
23.  
24.     private void ReadFromFile()
25.     {
26.         string[] allLines = File.ReadAllLines("quotes.txt");
27.         System.Random rnd1 = new System.Random();
28.               textFromFile = allLines[rnd1.Next(allLines.Length)];
29.  
30.      }
31.     }

 

Unity looks in ...

Code (CSharp):

1. Resources.Load("filenamehere");

That's assuming you have the file in your resources folder.

 

I have this error (one of many):
Cannot implicitly convert type `UnityEngine.Object' to `System.IO.StringReader'
on "StringReader allLines = Resources.Load ("quotes.txt");"

How should I convert type Object to string[]?

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3. using System.IO;
4. using UnityEngine.UI;
5.  
6. public class TextReadFromFile : MonoBehaviour {
7.  
8.  
9.     Text text;
10.     public string textFromFile;
11.  
12.     void Awake()
13.     {
14.         text = GetComponent <Text>();
15.     }
16.  
17.     void Update()
18.     {
19.         text.text = "Napis::: " + textFromFile;
20.  
21.     }
22.  
23.  
24.     private void ReadFromFile()
25.     {
26.  
27.  
28.        StringReader allLines = Resources.Load ("quotes.txt");
29.  
30.  
31.         System.Random rnd1 = new System.Random();
32.  
33.         textFromFile = allLines[rnd1.Next(allLines.Length)];
34.  
35.  
36.     }
37. }
38.  
39.  

 

I changed script into this:

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3. using System.IO;
4. using UnityEngine.UI;
5.  
6. public class TextReadFromFile : MonoBehaviour {
7.  
8.         Text text;
9.     public string textFromFile;
10.  
11.  
12.     void Awake()
13.     {
14.         text = GetComponent <Text>();
15.     }
16.  
17.     void Update()
18.     {
19.         text.text = "Napis::: " + textFromFile;
20.      }
21.  
22.  
23.     private void ReadFromFile()
24.     {
25.  
26.  
27.         StreamReader reader = new StreamReader("Resources/quotes.txt");
28.         string s = reader.ReadLine ();
29.  
30.         while(s != null)
31.         {
32.             System.Random rnd1 = new System.Random();
33.        
34.             s = reader.ReadLine ();
35.             textFromFile=s;
36.         }
37. }
38. }
39.  

But it doesn't work neither and I don't get any errors:/ There is only a "Napis::: " appearing on a screen, without textFromFile.

 

Code (csharp):

1.  
2. using UnityEngine;
3. using System.Collections;
4.  
5. public class TextFilePlay : MonoBehaviour
6. {
7.     string[] lineArray;
8.  
9.     void Start()
10.     {
11.         // <your project>/Assets/Resources/TextDoc.txt
12.         TextAsset myFile = (TextAsset)Resources.Load("TextDoc.txt");
13.         lineArray = myFile.text.Split("\n"[0]);
14.     }
15.  
16.     void Update()
17.     {
18.         if(Input.GetKeyDown(KeyCode.Q))
19.         {
20.             Debug.Log(lineArray[Random.Range(0, lineArray.Length)]);
21.         }
22.  
23.     }
24. }
25.  

I take no credit... I've pulled this together from a couple of unity answer threads

 

Here's how I'd do it

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3. using System.IO;                    // For parsing text file, StringReader
4. using System.Collections.Generic;    // For List
5.  
6. public class FileIO : MonoBehaviour
7. {
8.     public TextAsset wordFile;                                // Text file (assigned from Editor)
9.     private List<string> lineList = new List<string>();        // List to hold all the lines read from the text file
10.  
11.     void Start()
12.     {
13.         ReadWordList();
14.         Debug.Log("Random line from list: " + GetRandomLine());
15.     }
16.  
17.     public void ReadWordList()
18.     {
19.         // Check if file exists before reading
20.         if (wordFile)
21.         {
22.             string line;
23.             StringReader textStream = new StringReader(wordFile.text);
24.            
25.             while((line = textStream.ReadLine()) != null)
26.             {
27.                 // Read each line from text file and add into list
28.                 lineList.Add(line);
29.             }
30.            
31.             textStream.Close();
32.         }
33.     }
34.  
35.     public string GetRandomLine()
36.     {
37.         // Returns random line from list
38.         return lineList[Random.Range(0, lineList.Count)];
39.     }
40. }

 

Thanks guys, pixpusher2 solution helped me a lot.

 

Its been a while but still I did use Pixpusher2's script, assigned it to a textobject in unity display.log says it is picking a random line from my txt file but....
1. it is not showing in the text box
2. how can it pick a new line from the text file every 30seconds or something?

 

welcome
Please send me pictures showing how I can read and write in the user interface and save it in a .txt file

 

Please make a new post instead of replying to an older thread, and more clearly description what you're trying to accomplish.