C# Equivalent for FILE declaration

Question

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change file extension c#

the following code is in c++, how would i represent this in c#?

FILE fp = fopen(ChangeFileExt(Application.ExeName, ".DAT").c_str(), "w");

Another question related to this topic is:

The equivalent in c# for the following:

fputs((thisstring.CommaText + "\n").c_str(), fp);

I suspect it's not the file extension change he's interested in. Read the title of the post... — Patrik Svensson, Sep 19 '12 at 09:26
Do you want to write text (fprintf) or binary data ? In .NET that is separated. — H H, Sep 19 '12 at 09:53
If you have any questions -beyond your first-, please post it as a new question. =) — J. Steen, Sep 19 '12 at 10:36

score 9 · Answer 1 · answered Sep 19 '12 at 09:18

9

How about:

FileStream fs = File.OpenWrite(Path.ChangeExtension(Application.ExeName, "DAT"));

answered Sep 19 '12 at 09:18

Justin Harvey

thanks Justin, just what i was looking for :-) – Camren Chetty Sep 19 '12 at 10:12
Thanks guys, got it working now... another question related to the same topic is the equivalent in c# for the following: fputs((thisstring.CommaText + "\n").c_str(), fp); – Camren Chetty Sep 19 '12 at 10:28
Please can raise this as a separate question for clarity? – Justin Harvey Sep 19 '12 at 10:29

H H · Answer 2 · 2012-09-19T09:49:43.950

4

You can open (create) a FileStream based upon the EXE name:

FileStream fs = File.Create(
        Path.ChangeExtension(Application.ExeName, "dat"));

or maybe a TextWriter is closer to C/C++ FILE :

StreamWriter writer = File.CreateText(
        Path.ChangeExtension(Application.ExeName, "dat"));

But please note that writing to the ProgramFiles folder is prohibited for normal users.

edited Sep 19 '12 at 09:49

answered Sep 19 '12 at 09:19

H H

score 1 · Answer 3 · answered Sep 19 '12 at 09:19

1

Haven't compiled it, but this might give you an idea.

string appName = Assembly.GetExecutingAssembly().Location;
FileStream s = File.Open(Path.ChangeExtension(appName , ".DAT"), FileMode.OpenOrCreate);

answered Sep 19 '12 at 09:19

Patrik Svensson

Thanks guys, got it working now... used the code Justin posted. another question related to the same topic is the equivalent in c# for the following: fputs((thisstring.CommaText + "\n").c_str(), fp); Thanks Camren – Camren Chetty Sep 19 '12 at 10:27
var writer = new System.IO.StreamWriter("c:\filepath\file.txt"); writer.Write("This is a string without line break."); writer.WriteLine("This is a single line in the file."); – Patrik Svensson Sep 19 '12 at 14:39

3 Answers3