Stream TextReader to a File

Question

I have a TextReader object.

Now, I want to stream the whole content of the TextReader to a File. I cannot use ReadToEnd() and write all to a file at once, because the content can be of high size.

Can someone give me a sample/tip how to do this in Blocks?

Answer 1

using (var textReader = File.OpenText("input.txt"))
using (var writer = File.CreateText("output.txt"))
{
    do
    {
        string line = textReader.ReadLine();
        writer.WriteLine(line);
    } while (!textReader.EndOfStream);
}

Answer 2

Something like this. Loop through the reader until it returns null and do your work. Once done, close it.

String line;

try 
{
  line = txtrdr.ReadLine();       //call ReadLine on reader to read each line
  while (line != null)            //loop through the reader and do the write
  {
   Console.WriteLine(line);
   line = txtrdr.ReadLine();
  }
}

catch(Exception e)
{
  // Do whatever needed
}


finally 
{
  if(txtrdr != null)
   txtrdr.Close();    //close once done
}

Answer 3

Use TextReader.ReadLine :

// assuming stream is your TextReader
using (stream)
using (StreamWriter sw = File.CreateText(@"FileLocation"))
{
   while (!stream.EndOfStream)
   {
        var line = stream.ReadLine();
        sw.WriteLine(line);
    }
}