reading and writing to a txt file

[bjwade62]

I have an existing txt file that I want to open, get the text (which is a number), add 1 to the number and save/close the txt file.

 

Sound like filestream but I'm not sure how to use it. I've founds peices of information but nothing I can use together.

 

Any help out there?

 

Thanks,

[snarfblam]

Assuming that you are using DotNet 2.0 or later, and the number is the only contents of the text file, you could do something along the lines of the following:

[Vb]

 

Dim FileName As String

Dim Lines() As String 'Contents of the files will be stored here

 

Lines = System.IO.File.ReadAllLines(FileName)

' This assumes that the first line of the file contains a properly formatted number

Dim Value As Double = Double.Parse(Lines(0))

' Increment the number

Value += 1

' Store it back in the document

Lines(0) = Value.ToString()

' Write the document back to the disk

System.IO.File.WriteAllLines(FileName, Lines)

[/code]

I haven't tested it and some exception handling would be a very good idea, but that's the jist of it.

[bjwade62]

That worked. Thanks