Why is StreamWriter not working?

[shockna1]

Im trying to write a class to replace strings in a text file but for some reason StreamWriter will not work in my class. Its not throwing any exceptions or anything its just not writing to the text file. Also I used to have a destructor in my class but it was throwing an exception when I tried to close or dispose outFile.

class TextReplacer
{
    private StreamReader inFile;
    private StreamWriter outFile;

    public TextReplacer(StreamReader _in, StreamWriter _out)
    {
        inFile = _in;
        outFile = _out;

        outFile.WriteLine("TESTING!!!"); // DOES NOT WORK
    }

    public void Repace(string find, string replace)
    {
        string line = inFile.ReadLine();

        if (line != null)
        {
            line = line.Replace(find, replace);

            Console.WriteLine(line);

            outFile.WriteLine(line); // DOES NOT WORK

            Repace(find, replace);
        }

        return;
    }
}

[Aimee Bailey]

I'm betting this is probably because you still have the file open in read-only mode. A quick way to do what your trying to do could be:

public void ReplaceInFile(string file, string find, string replace)
{
	string buffer = File.ReadAllText(file);
	buffer = buffer.Replace(find, replace);
	File.WriteAllText(file, buffer);
}

However if you needed to use StreamReader and StreamWriter within a class, then this is probably what your looking for:

public void Replace(string find, string replace)
{
	string buffer = "";
	using(FileStream fs = new FileStream(m_Filename, FileMode.OpenOrCreate, FileAccess.ReadWrite))
	{
		StreamReader sr = new StreamReader(fs);
		buffer = sr.ReadToEnd();
				
		buffer = buffer.Replace(find, replace);
			
		fs.Position = 0;
				
		using(StreamWriter sw = new StreamWriter(fs))
		{
			sw.Write(buffer);
			sw.Flush();
			sw.Close();
			sr = null;
		}
	}	
}

All the best.

Aimee.