C# Discussion Boards - CodeProject

N a v a n e e t h10-Apr-08 18:15

N a v a n e e t h

10-Apr-08 18:15

Reflector[^] can show IL code.

All C# applications should call Application.Quit(); in the beginning to avoid any .NET problems.- Unclyclopedia

How to use google | Ask smart questions

sujithkumarsl10-Apr-08 18:43

sujithkumarsl

10-Apr-08 18:43

its a third party tool na..
i want to do it from my test application

My small attempt...

Christian Wikander10-Apr-08 22:48

Christian Wikander

10-Apr-08 22:48

Did you try to search the site prior to asking? Maybe this can provide some help: http://www.codeproject.com/KB/dotnet/asmex.aspx[^]

compute hash value for a string

Brady Kelly10-Apr-08 22:35

Brady Kelly

10-Apr-08 22:35

ILDASM.EXE comes with Visual Studio.

Pits fall into Chuck Norris.

George_George10-Apr-08 15:23

10-Apr-08 15:23

Hello everyone,

I am new to how to use C# to calculate hash value for a string. I want to check we normally use MD5CryptoServiceProvider.ComputeHash?

As described here?

http://support.microsoft.com/kb/307020/en-us

thanks in advance,
George

Christian Graus10-Apr-08 17:28

Christian Graus

10-Apr-08 17:28

What's wrong with the gethash method that's built in ?

You can use any method you like, but I would agree you should use a built in crypto class, if you want something other than the built in method.

Christian Graus

Please read this if you don't understand the answer I've given you

"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )

George_George10-Apr-08 19:04

10-Apr-08 19:04

Thanks Christian,

Do you have a sample for gethash? I can not find one from MSDN or Google. Smile | :)

regards,
George

Christian Graus10-Apr-08 19:43

Christian Graus

10-Apr-08 19:43

GetHashCode is a method on all objects in .NET

George_George10-Apr-08 20:00

10-Apr-08 20:00

Thanks Christian,

Question answered. I searched for "gethash" other than "GetHashCode" before, so no samples are found. Smile | :)

have a good weekend,
George

N a v a n e e t h10-Apr-08 17:49

N a v a n e e t h

10-Apr-08 17:49

George_George wrote:
use MD5CryptoServiceProvider.ComputeHash?

MD5 is weak. There are many algorithms available to get the original string from a MD5 hash. You may consider using SHA. There are different types like SHA256 , SHA384 , SHA512 etc. Here is an example which uses SHA512 to hash.

string stringToBeHashed = "Hello";
byte[] bytesToBeHashed = Encoding.ASCII.GetBytes(stringToBeHashed);
SHA512 sha = new SHA512Managed();
byte[] hashedBytes = sha.ComputeHash(bytesToBeHashed);
string hashedString = Convert.ToBase64String(hashedBytes);

Hope this helps

All C# applications should call Application.Quit(); in the beginning to avoid any .NET problems.- Unclyclopedia

How to use google | Ask smart questions

George_George10-Apr-08 19:06

10-Apr-08 19:06

Cool, N a v a n e e t h!

regards,
George

Mark Churchill10-Apr-08 19:47

Mark Churchill

10-Apr-08 19:47

It depends on whether you need a cryptographically strong hash or not.

.GetHashCode is fast and quite weak (its easy/more likely to find something with the same hash).

The CSPs are a lot slower but generate much stronger hashes.

Mark Churchill
Director
Dunn & Churchill
Free Download:
Diamond Binding: The simple, powerful, reliable, and effective data layer toolkit for Visual Studio.

George_George10-Apr-08 19:55

10-Apr-08 19:55

Thanks Mark,

CSP you mean Crypto Service Provider? Or? For example, C# class do you refer?

regards,
George

Mark Churchill10-Apr-08 20:28

Mark Churchill

10-Apr-08 20:28

Yep the crypto service providers.

Mark Churchill
Director
Dunn & Churchill
Free Download:
Diamond Binding: The simple, powerful, reliable, and effective data layer toolkit for Visual Studio.

George_George10-Apr-08 21:41

10-Apr-08 21:41

Thanks Mark,

Cool!

regards,
George

Sending email using c#

YAI10-Apr-08 13:34

YAI

10-Apr-08 13:34

Hi,

I am trying to send email using c# and the code from my research is here:

MailMessage logMailMessage = new MailMessage();
logMailMessage.To = "email1@hotmail.com";
logMailMessage.Subject = "Subject is here ";
logMailMessage.From = "email2@hotmail.com";
logMailMessage.Attachments.Add(new MailAttachment(Settings.LogFile));
SmtpMail.Send(logMailMessage);

What I don't know is how does the machine know the password of email address that I am using to send the email? pls help thk Big Grin | :-D

Dave Kreskowiak10-Apr-08 13:38

Dave Kreskowiak

10-Apr-08 13:38

YAI wrote:
hat I don't know is how does the machine know the password of email address that I am using to send the email?

It doesn't. You have to supply it somehow. That's if your SMTP server (which, BTW, you didn't specify anywhere) requires a username/password to send a message.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

PIEBALDconsult10-Apr-08 15:06

PIEBALDconsult

10-Apr-08 15:06

It's usually done with anonymous SMTP, if your SMTP server allows such.

YAI10-Apr-08 18:31

YAI

10-Apr-08 18:31

Thank for the replies. And How can I know whether Smtp server allows that? If I want to check whether the sending is successful, is putting try catch with catch(Exception ex) enough?

#realJSOP11-Apr-08 4:20

#realJSOP

11-Apr-08 4:20

Most don't any more. For instance, AT&T changed their servers a few weeks ago to disallow the practice.

"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

Abhijit Jana10-Apr-08 18:26

Abhijit Jana

10-Apr-08 18:26

Those mail are send via SMTP. if you want to send mail from your accout then you have to set the NetworkCredential For that. which contain your name, password and domain

Best Regards
-----------------
Abhijit Jana
Microsoft Certified Professional
"Success is Journey it's not a destination"