C# Tutorial: Writing Text Files

[Keuvie]

Thanks!

[Xav]

You're welcome, I'm here to help.

[PlayaSkater]

Thanks for the tutorial, Xav. I haven't gotten too much into file interaction with C# and this got me interested. By the way, would this be an appropriate method for storing passwords of some sort? Like if you were making a login program, it would simply read for the Username and corresponding password?

[Xav]

You could certainly do that, although if you have lots of users then a database or XML would be better. Whatever you use, remember to encrypt the file containing the data, for security.

And you're welcome.

[amrosama]

hi xav, im glad u brought the System.IO class cuz it reminded me with a little coding problem that i didnt find a reason or solution for it heres the code:

 System.IO.FileInfo MyFile = new System.IO.FileInfo("newfile.txt");
 MyFile.Create();

and any statement that uses the same files gives an "file still opened by another process" exception.
and i didnt find any ".close()" method ..

[Xav]

I've never actually used a FileInfo object. How about:

//Create a new file called newfile.txt.
System.IO.File.Create("newfile.txt"); 

Notice how no variables are necessary, as File.Create() is static.

[amrosama]

still, i have the same problem when i try to access the same file like this

  System.IO.File.Create("newfile.txt");
  System.IO.File.ReadAllText("newfile.txt");

it gives the same exception on line 2

[Xav]

Eh? How are you going to read the text from a file if you've just created it? It's going to be blank!

[amrosama]

still, it returns "being used by another process" exception....but never mind
i found an alternate by using a stream writer

  System.IO.StreamWriter create = new System.IO.StreamWriter("newfile.txt");
  create.Close();

[Xav]

That's the same method I used in my tutorial!