Question

I have a question. This code open fine the txt files with english text, but when I trying to open the txt files with cyrillic text… the cyrillic symbols are “squares”. Is it possible to resolve this problem?

        string fileData = openFileDialog1.FileName;
        StreamReader sr = new StreamReader(fileData);
        richTextBox.Text = sr.ReadToEnd();
        sr.Close();

        SavedFile = saveFileDialog1.FileName;
        dataTextBox.SaveFile(SavedFile, RichTextBoxStreamType.PlainText);

Solution:

        string fileData = openFileDialog1.FileName;
        StreamReader sr = new StreamReader(fileData, Encoding.Default);
        richTextBox.Text = sr.ReadToEnd();
        sr.Close();

Answer 1

And you are SURE the file is UTF8, right? If you write string str = sr.ReadToEnd();, place a breakpoint on the next line and watch str in Visual Studio, you see cyrillic text right? Try opening the file in notepad, File->Save As and select UTF8 as encoding.

The reason notepad is able to “read” the file is that it uses the user codepage, and in your case it’s probably the Windows-1251 (Cyrillic) Codepage. StreamReader tries to read the file as UTF8. If you want you can force StreamReader to use a different codepage. The second parameter is the Encoding you want to use. You pass Encoding.GetEncoding(1251) for cyrillic. Sadly you must know the Encoding “a priori” (=before) reading the file.