change the extension of image

Question

1.00/5 (2 votes)

See more:

Hello...i want to change the extension of images in the disk to the ico extension what's the wrong of my code

C#

string ic = "ico";
foreach (var fil in Directory.GetFiles(Server.MapPath("~/minimalcolors/"))) {
string ext = fil.Substring(fil.IndexOf("."));
ext.Replace(ext, ic);

Posted 28-Feb-13 2:50am

Amro Mustafa

Add a Solution

Comments

[no name] 28-Feb-13 8:53am

You do know that Replace returns a new string right? All you are doing is throwing the result away.

Sergey Alexandrovich Kryukov 11-Mar-13 10:12am

Of course, but the problem is different. Why would anyone change "extension" of some image to icon? Please see my answer...
—SA

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Sergey Alexandrovich Kryukov · Answer 1 · 2013-03-10T14:03:00

It is absolutely useless to "change extensions" of anything. It has nothing to do with actual file format.
Actually, there is no such thing as "extension". By historical reasons, either last three characters at the end of the file name, or all characters after '.' at the end are called "extension". In obsolete FAT file system and MS-DOS, all file names were 8-character name and 3-character "extension". In newer systems, there are no such thing anymore, but a part of file name at the end (as I described above) is used to identify "file type". It does not mean much; it's just that the Windows Shell tried to look up the Windows registry to find the "default application" used to open the file. It cannot help to read the file if the "extension" does not match its actual content and format.

—SA

**Orcun Iyigun** · Answer 2 · 2013-02-28T02:56:00

Solution 1

You should use Path.ChangeExtension method. MSDN Link[^]

C#

var result = Path.ChangeExtension(yourfile, ".jpg");

If you want to physically change the extension, you could use File.Move method:

C#

File.Move(yourfile, Path.ChangeExtension(yourfile, ".jpg"));

Good luck,
OI

Posted 28-Feb-13 2:56am

Orcun Iyigun

Updated 28-Feb-13 2:57am

v2

Comments

Amro Mustafa 28-Feb-13 9:03am

thank you....i will try

ridoy 28-Feb-13 12:57pm

+5

Sergey Alexandrovich Kryukov 10-Mar-13 20:05pm

It cannot help to "convert" icon to JPEG or anything like that, totally useless. Just a wrong answer, sorry. Formally, it will change exception, yes, but can you see what OP is trying to do? This is just misleading, for this "purpose".
—SA

Orcun Iyigun 11-Mar-13 3:39am

After seeing your answer I agree to it but in my answer my purpose is not to convert to JPEG as you mentioned. It is just an example, I know you understand that part. Heck, I don't know which extension he wants to convert. It would be totaly ridicilous to change the extension from mp3 to jpeg since they are not matching in format either. But you have seen the bigger picture. Kudos to you.

Sergey Alexandrovich Kryukov 11-Mar-13 10:10am

Thank you, Orcun.
—SA

Orcun Iyigun 11-Mar-13 10:14am

Btw 5ed :) as usual.