C# Discussion Boards - CodeProject

jtmtv1816-Dec-02 9:51

16-Dec-02 9:51

can any help me with a problem ! ... i have a encryption program that encrypts (anything) in RC2 or DES. the encryption method is in a static void and gets the (readfile) (writefile) (password)

the read file comes in the form of a full path name ie(c:\something\test.exe) then it is sent to the (readfile) part of encryption as a string. my question is how can i try this directory name and just show the file name(test.exe) and send that too (writefile) with a *.enc extention on it but still preserving the original write name. !! i have not clue how to do this. all i really need to do is trim the string but how because what if the directory isnt the exsact same size as (c:\something\test.exe) anyways all help with this question would be much appreciated.

Jesse M.

Re: question on string and encryption sorta

jtmtv1816-Dec-02 10:45

jtmtv18

16-Dec-02 10:45

oops... had to fix some things.. here's the fixed question lol:

can any help me with a problem ! ... i have a encryption program that encrypts (anything) in RC2 or DES. the encryption method is in a static void and gets the (readfile) (writefile) (password)

the read file comes in the form of a full path name ie(c:\something\test.exe) then it is sent to the (readfile) part of encryption as a string. my question is how can i remove this directory name and just show the file name(test.exe) and send that too (writefile) with a *.enc extention on it but still preserving the original write name. !! i have not clue how to do this. all i really need to do is trim the string but how because what if the directory isnt the exsact same size as (c:\something\test.exe) anyways all help with this question would be much appreciated.

Re: question on string and encryption sorta

Rob Graham16-Dec-02 11:15

Rob Graham

16-Dec-02 11:15

<br />
using System.IO;<br />
...<br />
string justTheName = Path.GetFileNameWithoutExtension(theFullPathNameIHave);<br />
string theNameIWant = justTheName + ".enc";<br />
<br />

help require?

imran_rafique16-Dec-02 6:49

imran_rafique

16-Dec-02 6:49

I have created a service in c#.
And I am executing a Process.Start command in this code ( OF SERVICE PROJECT) .
that command(Process.Start ) is executing sucessfully for local drives but it throws Win32Exception (means There was an error in opening the associated file) at network path. for example path is \\computername\folder1\folder2\some.exe

AND it heapens only with Service type application all other applications are executing any process at network path (i.e \\computername\folder1\folder2\some.exe)successfully with this command(Process.Start).

Can any body tell how will I make my Service to execute any Process at network path?

r00d0034@yahoo.com

Re: help require?

Andres Manggini16-Dec-02 12:13

Andres Manggini

16-Dec-02 12:13

Hi,

Could it be that your service is running under an account that does not have sufficient permissions to access shared folders ?.

Hope this helps.

Andres Manggini.
Buenos Aires - Argentina.

Re: help require?

imran_rafique16-Dec-02 12:36

imran_rafique

16-Dec-02 12:36

it did not help at all.
service is running under admin account.

r00d0034@yahoo.com

Windows Form Control hosted in IE

LJMorsillo16-Dec-02 4:34

LJMorsillo

16-Dec-02 4:34

Here's a story... I hope someone can help me write a happy ending in time for Christmas!
I have a control

<code>namespace WvfCtlNet {
public class WvfCtl : System.Windows.Forms.UserControl .... </code>

which I'm hosting in IE

<OBJECT id="control" classid="http:WvfCtlNet.dll#WvfCtlNet.WvfCtl" name="control"> ...

I'm not getting anything other than a little box (place holder) when the page is displayed.

The control shows up in the GAC downloads ("gac /ldl") The version number agrees with the dll.

When I look in Internet Options-Settings..-View Files... I see the following entry:
?FusionBindError!name=WvfCtlNet.dll WvfCtlNet.WvfCtl

What the heck is this? (I think I know that Fusion is a technology related to 'no touch' installation but that's about it!)

Why doesn't my contol pop up? I works when hosted by an Windows Forms app.

Worst of all - This was working a week ago - I've not made any config changes, though I did recently install the Microsoft Web Services Extensions (WSE) pack.

I am flummoxed!

Thank you.
Sincerely, Lindsay

xor strings??

Karavaev Denis15-Dec-02 23:52

Karavaev Denis

15-Dec-02 23:52

How to make simple xor in C#?

=====================
http://wasp.elcat.kg

Re: xor strings??

Kannan Kalyanaraman16-Dec-02 0:13

Kannan Kalyanaraman

16-Dec-02 0:13

Hi,
If you are looking at nos. then you can use ^ operator.
For strings, you need to first convert them to bytes,

<br />
ASCIIEncoding enc = new ASCIIEncoding ();<br />
byte[] keybytes = enc.GetBytes (key);<br />

here key is of type string

once you have converted to bytes, you can work on them.
Hope this helps.

Cheers
Kannan

Re: xor strings??

Karavaev Denis16-Dec-02 0:46

Karavaev Denis

16-Dec-02 0:46

string txt1 = "some_text";
string txt2 = "anything_else";
ASCIIEncoding enc = new ASCIIEncoding();
ASCIIEncoding enc2 = new ASCIIEncoding();
byte[] kb1 = enc.GetBytes(txt1);
byte[] kb2 = enc2.GetBytes(txt2);
MessageBox.Show(kb1 ^ kb2);

Operator '^' cannot be applied to operands of type 'byte[]' and 'byte[]'

damm, what I did wrong?

=====================
http://wasp.elcat.kg

Re: xor strings??

Christian Graus16-Dec-02 0:54

Christian Graus

16-Dec-02 0:54

You need to ^ each byte, not the whole lot. You need to step through the strings, and can only perform the operation on the set of bytes that exists in both arrays, so unless the two strings are always the same length ( which they are not in your example ), I doubt you're going to get what you wanted.

Christian

No offense, but I don't really want to encourage the creation of another VB developer.
- Larry Antram 22 Oct 2002

C# will attract all comers, where VB is for IT Journalists and managers - Michael
P Butler 05-12-2002

Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not
as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002

Re: xor strings??

Karavaev Denis16-Dec-02 1:06

Karavaev Denis

16-Dec-02 1:06

Ok, is there any other simple way to encode\decode some string?

=====================
http://wasp.elcat.kg

Re: xor strings??

Christian Graus16-Dec-02 1:09

Christian Graus

16-Dec-02 1:09

Yes, there is apparently heaps of encryption/decryption stuff in .NET, but I confess to not having used any of it, yet.

Christian

No offense, but I don't really want to encourage the creation of another VB developer.
- Larry Antram 22 Oct 2002

C# will attract all comers, where VB is for IT Journalists and managers - Michael
P Butler 05-12-2002

Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not
as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002

Re: xor strings??

Kannan Kalyanaraman16-Dec-02 1:04

Kannan Kalyanaraman

16-Dec-02 1:04

You will have to iterate the array and do the operations individually on every byte.

<br />
 for(int i=0; i<10; i++)<br />
       kb1[i] ^= kb2[i];	<br />

Cheers
Kannan

Re: xor strings??

Daniel Turini16-Dec-02 0:22

Daniel Turini

16-Dec-02 0:22

Besides the above suggestion, you can after this, create a BitArray with the byte[] and use its Xor method.

I see dumb people

Dynamically Generating Data for a Waveform Graph Control

Matthew Alan Gray15-Dec-02 16:27

Matthew Alan Gray

15-Dec-02 16:27

I am currently developing a waveform graph control, and I am having difficulty in dynamically displaying multiple plots. Basically, I want to display anywhere from one to an undetermined number of plots on a single graph; I could use arrays to do this, but there would be difficulty resizing the arrays if I set the size of the arrays too low, and there would be wasted resources if I set the size of the array to high... What I need is an efficient way to add, update, and remove structures representing plot data that can be easily and efficiently resized -- is there a straightforward way to do this in C#??

Matthew Alan Gray, B.S.C.E.
Graduate Student, Mississippi State University
mag2@ece.msstate.edu

same COM object?

peterchen15-Dec-02 10:00

peterchen

15-Dec-02 10:00

And another one...

COM rules state that to check if two interfaces point to the same COM object, QI both interfaces for IUnknown directly, and compare the results.

How do I do that in C#?

If I could find a souvenir / just to prove the world was here [sighist]

Re: same COM object?

Rama Krishna Vavilala15-Dec-02 16:52

Rama Krishna Vavilala

15-Dec-02 16:52

Equals() method takes care of that for you or == operator.

The mistakes made in this API make me realise that Microsoft has become big enough that it can shelter morons. If anyone working for me wrote anything this bad and tried to release it, I would kill them and display the body as a warning to the rest of the team. - Christian Graus about C# - GDI+

ArrayList == vector and list ?

peterchen15-Dec-02 9:59

peterchen

15-Dec-02 9:59

Hi,

Is ArrayList a "reasonable" replacement for both vector and list?
It feels a bit weird, but the best I could find in the System.Collecitons namespace.

TIA
Peter

If I could find a souvenir / just to prove the world was here [sighist]

Re: ArrayList == vector and list ?

Nick Parker15-Dec-02 16:55

Nick Parker

15-Dec-02 16:55

peterchen wrote:
Is ArrayList a "reasonable" replacement for both vector and list?

I believe it is for MS, however others weren't so pleased for one reason or another so there have been some "additions". All in C#:
Doubly-Linked List Implementation[^]
Add Support for "Set" Collections to .NET[^]

Nick Parker

You see the Standards change. - Fellow co-worker

Re: ArrayList == vector and list ?

Barry Lapthorn15-Dec-02 20:15

Barry Lapthorn

15-Dec-02 20:15

Just watch out, as by default it does a shallow copy. And of course you have to cast it back to the type you're looking for Smile | :)

Regards

Barry

Looking for a free FTP class library for .NET

gicio15-Dec-02 5:49

gicio

15-Dec-02 5:49

HI!

Is there an free FTP class library for .NET available?

OR an open source project that write a FTP class?

gicio

Re: Looking for a free FTP class library for .NET

leppie15-Dec-02 6:14

leppie

15-Dec-02 6:14

You know you could have saved yourself alot of time by just doing a search here on CP or on GotDotNet, instead you go and cross post in 3 different forums Dead | X|

WebBoxes - Yet another collapsable control, but it relies on a "graphics server" for dynamic pretty rounded corners, cool arrows and unlimited font support.

Debugger anomaly

Paul Silvernail15-Dec-02 5:25

Paul Silvernail

15-Dec-02 5:25

This is a first !!!!
WTF | :WTF:

After working on my final project for school late last night, I woke to find the debugger gremlins had come.

When I try to debug my project (F5) MS VC# hangs. The task manager show a process for my app was created, but the app never shows up as a task. I tried deleting the debug directory and doing a rebuild, no luck! If I execute without the debugger (ctrl+F5), either in release or debug build, the app runs.

Sounds like a real world release nightmare WTF | :WTF:

If anyone has ideas, please please let me know.

Thanks,
Paul

Re: Debugger anomaly

leppie15-Dec-02 5:34

leppie

15-Dec-02 5:34

Paul Silvernail wrote:
I tried deleting the debug directory and doing a rebuild, no luck!

Delete all them directories, and try again. I found that seems to work. A reboot is sometimes required.

WebBoxes - Yet another collapsable control, but it relies on a "graphics server" for dynamic pretty rounded corners, cool arrows and unlimited font support.

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