使用Streamreader输入不会在StreamWriter中提供相同的输出

Question

I'm reading a file with a StreamReader and writing the exact line to another file with a StreamWriter. The problem I have however is that in the resulting file any occurence of the character '¦' is converted to '?'.

This is the code for initializing my streams:

using (var readFile = new FileStream(path, FileMode.Open, FileAccess.Read))
{
    using (var writeFile = new FileStream(@"Modified\" +   Path.GetFileName(path), FileMode.Create, FileAccess.Write))
    {
        using (var sr = new StreamReader(readFile, new ASCIIEncoding()))
        {
            using (var sw = new StreamWriter(writeFile, new ASCIIEncoding()))
            {
                //Read line and write it to the writer
            }
        }
    }
}

Could this be a problem with the streams or is it more likely a problem with the original file? The original file itself displays just fine in multiple text editors, so it seems correct.

Answer 1

¦ isn't a valid ASCII character so I'm assuming the original file isn't ASCII encoded. Changing the encoding type to UTF would resolve the issue but it's difficult to know if that is valid for your requirements.

using (var sr = new StreamReader(readFile, new UTF8Encoding()))
{
    using (var sw = new StreamWriter(writeFile, new UTF8Encoding()))

See http://www.asciitable.com/ fpr the valid ascii character list.

Answer 2

这是通过使用Encoding.Default而不是ASCIIEncoding来解决的。