file reading/writing

[Venkat]

Hi,
I need to read a file and simultaneously modify the same file , i.e, read
a file and then change some contents in it and then save it once again.

How do I do this?

Thanks,

[Morten Wennevik]

Hi Venkat,

Try reading the file, modify in memory and write everything back to the
file.
--
Happy Coding!
Morten Wennevik [C# MVP]

[Venkat]

Any samples pls?

"Morten Wennevik" wrote:

Hi Venkat,

Try reading the file, modify in memory and write everything back to the
file.
--
Happy Coding!
Morten Wennevik [C# MVP]

[Chad Z. Hower aka Kudzu]

=?Utf-8?B?VmVua2F0?= <Ve****@discuss ions.microsoft. com> wrote in
news:5F******** *************** ***********@mic rosoft.com:

Any samples pls?

Without knowing what your file contains thats quite impossible. I dount
you'll get anyone to write the code for you anyways though - we all have jobs
too. ;)
--
Chad Z. Hower (a.k.a. Kudzu) - http://www.hower.org/Kudzu/
"Programmin g is an art form that fights back"

Empower ASP.NET with IntraWeb
http://www.atozed.com/IntraWeb/

[Landi]

Venkat,
I have a job too but I will take a minute to tell you about this wonderful
place of the internet.
Check this out. http://www.google.com/search?q=csharp+read+write+file

Hope it helps.
-- Landi

"Venkat" <Ve****@discuss ions.microsoft. com> wrote in message
news:46******** *************** ***********@mic rosoft.com...

Hi,
I need to read a file and simultaneously modify the same file , i.e, read a file and then change some contents in it and then save it once again.

How do I do this?

Thanks,

[Nick Malik [Microsoft]]

Hello Venkat,

Your problem is way too vague to actually answer with a single answer.

Let's say you have a file that is not composed of fixed length strings. The
file contains the string "ABC DEF GHI" and you want to replace this entire
string with "ZYX". Well, the new string is shorter than the old one... so
you have to move up the rest of the bytes in the file to fill in the "hole"
you left. On the other hand, you may be substituting a longer string, and
your problem is reversed. What if you want to make more than one change in
a pass? What if you have pattern matching logic that you need to apply?

And these considerations are different if you are talking about updating the
contents of a file containing only fixed length records, or using a more
complicate encoding scheme like Shift-JIS, or using a structured mechanism
like XML sitting on top of character encoding.

If you'd like to ask a more specific question, or at least provide some
insight into the nature of your data, you may get more specific answers to
your questions.

--
--- Nick Malik [Microsoft]
MCSD, CFPS, Certified Scrummaster
http://blogs.msdn.com/nickmalik

Disclaimer: Opinions expressed in this forum are my own, and not
representative of my employer.
I do not answer questions on behalf of my employer. I'm just a
programmer helping programmers.
--
"Venkat" <Ve****@discuss ions.microsoft. com> wrote in message
news:46******** *************** ***********@mic rosoft.com...

Hi,
I need to read a file and simultaneously modify the same file , i.e,
read
a file and then change some contents in it and then save it once again.

How do I do this?

Thanks,