Question on TextReader & TextWriter

[flash.tato]

I have a file with this structure

[B]4 81 xxx xxx xxx 0[/B]
[B]4 82 xxx xxx xxx 0[/B]
[B]4 83 xxx xxx xxx 0[/B]
[B]4 84 xxx xxx xxx 0[/B]

xxx xxx xxx are values that i don't know.

I want that clicking a button it search the line that it starts with "4 81" and edit xxx xxx xxx (in the same line) with "789 980 650"

How can I do?!

 

[jmcilhinney]

You don't edit text files. You read them into a String or Strings, edit those, then write the result back to the file. The easiest way would be to use the IO.File.ReadAllLines method to get an array of lines from the file. You can then perfrom whatever edits you need and call IO.File.WriteAllLines to write out the new text.

 

[flash.tato]

Can you post a code sample?

Because there are string values that i don' know (xxx xxx xxx) and i want to overwrite them.

 

[jmcilhinney]

That's purely string manipulation. Use the String.Split method to break a line up on the spaces, then edit whichever part syou need to.