Replace Text in a TextFile c#

Question

What is the best way to replace text in a text file?

1. I do not want to give the file a new name
2. I do not want the text to become one long string which is what happens when I use File.ReadAllText because this is stored as a string and I loose carriage returns etc...

Also, I guess I will run into issues using a StreamReader/StreamWriter because you cannot read and write to the same file?

Thanks

Answer 1

You can do it with a stream opened for both reading and writing:

FileStream fileStream = new FileStream(@"c:\myFile.txt", FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.None);
var streamWriter = new StreamWriter(fileStream);
var streamReader = new StreamReader(fileStream);

...

fileStream .Close();

But the most easy way is still to read all file, edit the text and write it back to the file:

var text = File.ReadAllText(@"c:\myFile.txt");

...

File.WriteAllText(@"c:\myFile.tx", text);