stream encoding setting

[vedro-compota]

hello guys))
Advice please - how to set the stream encoding? (to read a text file)
I use this code -

StreamReader stream1 = new StreamReader(fs);
            System.Text.Encoding code = stream1.CurrentEncoding;
            StreamReader stream2 = new StreamReader(fs,code);
            while ((i = stream2.ReadLine()) != null) 
            {
               
                label1.Text = label1.Text + i;
            }
            stream2.Close();

but in label1.text I have only numbers and weird characters ((
tell me - where's the mistake?
Thank you in advance)

[Mitja Bonca]

Why do you want to encode a text? A text its alredy encoded, dont you think. You only need to get it from the file into a label.

[Mitja Bonca]

You can do it like that:

using (StreamReader reader = new StreamReader(@"C:\myFile.txt"))
        {
            string line;
            while ((line = reader.ReadLine()) != null)
            {
                label1.Text += line + Environment.NewLine;
            }
        }

[vedro-compota]

if i run this -

StreamReader reader = new StreamReader(@"C:\map.txt");
        
            string line;
            while ((line = reader.ReadLine())  != null)
            {
                label1.Text += line + Environment.NewLine;
            }

in label1.text I have only -

������� 20 20 2 4 5
������ 40 50 1 3 4 6 7
������ 70 90 3 6 9
������ 23 90 1 3 4 8 9
����� 34 100 7 8
�����-���� 300 300
�������� 67 83 2 3 8
����� 92 63 1 4 5 6
����������� 400 300 2
��������� 500 400 2

[vedro-compota]

The problem is that words are not written in English))) tell me - how to read a file character by character?

[Mitja Bonca]

Not in english? So this is useless then.
But there is the code you wanted - to read character by character:

using (StreamReader sr = new StreamReader(path)) 
            {
                //This is an arbitrary size for this example.
                char[] c = null;

                while (sr.Peek() >= 0) 
                {
                    c = new char[1]; //1 character at a time
                    sr.Read(c, 0, c.Length);
                    //The output will look odd, because
                    //only five characters are read at a time.
                    Console.WriteLine(c);
                }
            }

Hope it does some help to you.

[vedro-compota]

but can I do something like this -

StreamReader reader = new StreamReader(@"C:\map.txt");
        
            string line;
            while ((line =[B] reader.Read().ToString())[/B]  != null)
            {
                label1.Text += line + Environment.NewLine;
            }

?
why in this case, the program hangs?

[Mitja Bonca]

Where it hangs up? Or is it tryig to go into infinity in the while loop? If so, that means its still reading the file - mayne you read a file byte by byte (like I showed you on the previous example) and this is taking very long time - depends of the file lenght.
Otherwise I cannot see any other reason to hang up.
Take a look in a debug mode (put the break point and go line by line with pressing F11).

Hope it helps,
Mitja

[vedro-compota]

Where it hangs up?

thank you very much , Mitja Bonca !
I forgot to change the loop condition)) - now everything works)) but wrong)) -

StreamReader reader = new StreamReader(@"C:\map.txt");
        
            string line;
            int i=0;
            while ((i= reader.Read())  != -1)
            {
                line = i.ToString();
                label1.Text += line ;
                textBox1.Text += line ;
            }

there's only one line in the file -

Voronezh 20 20   2 4 5

but in label1.text I have -

861111141111101011221043250483250483232325032523253131013101310

[Mitja Bonca]

Would you mind giving me the content of the file? So I can try it on my own.

btw, where you read: Voronezh 20 20 2 4 5

[vedro-compota]

Of course! here it is

[Mitja Bonca]

I have chnaged a code a bit, and now it works:

private void ReadingFile()
        {
            using (StreamReader sr = new StreamReader(@"C:\1\map.txt"))
            {
                string line;
                // Read and display lines from the file until the end of 
                // the file is reached.
                while ((line = sr.ReadLine()) != null)
                {
                    if (line != String.Empty)
                        label1.Text = line + Environment.NewLine;
                }
            }
        }

I hope it does work for you too.
Mitja

[vedro-compota]

Mitja, but what about read (not readline) method?

[kvprajapati]

To display multi-lingual chars set Unicode font.

string[] lines = System.IO.File.ReadAllLines(@"c:\file.txt", System.Text.Encoding.Unicode );

label1.Font=new Font("Arial Unicode MS",10f);
foreach (string l in lines)
    label1.Text += l + "\n";

[vedro-compota]

there is an easier way to work with a certain (multilingual, inter alia) encoding and character by character reading. here it is.

string FilePath = Application.StartupPath + @"/map.txt";
            StreamReader reader = new StreamReader(FilePath,Encoding[B][U].UTF8[/U][/B]);
            [B]char[] c[/B] = new char[1];
            int i=0;
            while ((i= reader.Read())  != -1)
            {
                c[0]=  Convert.ToChar(i);
                [B]string line = new string ( c);[/B]
                label1.Text += line ;
                textBox1.Text += line ;
            }

If anyone knows how we can improve this algorithm - share knowledge))

[Mitja Bonca]

What are you trying to get with using Read() method?
This method returns an integer (not a string) so that it can return -1 if the end of the stream has been reached (like you did in your example), but I still dont get what are you trying to get - if you want to get the string inside the file, it will simply not go.
This why you have to use ReadLine(), or method like adapost has shown you in post above.

I hope this helps clearing the issue here.
best regards,
Mitja

[vedro-compota]

I just wanted to read a file character by character - and, each time getting a string value of integer code (in accordance with the encoding))) thank you very much for your help))