.NET (Core and Framework)

David Stone12-Nov-02 4:35

David Stone

12-Nov-02 4:35

Oh great. So now we can program for the inferior beings. Big Grin | :-D

Seriously though, it was only a matter of time before it was ported from FreeBSD to OSX because the latter has FreeBSD underpinnings.

You will now find yourself in a wonderous, magical place, filled with talking gnomes, mythical squirrels, and, almost as an afterthought, your bookmarks
-Shog⁹ teaching Mel Feik how to bookmark

I don't know whether it's just the light but I swear the database server gives me dirty looks everytime I wander past.
-Chris Maunder

Paul Watson12-Nov-02 5:43

Paul Watson

12-Nov-02 5:43

David Stone wrote:
OSX because the latter has FreeBSD underpinnings.

Just curious but how does the whole Unix, Mac OSX, FreeBSD and Linux world relate? How different are they to each other?

Paul Watson
Bluegrass
Cape Town, South Africa

Ray Cassick wrote:
Well I am not female, not gay and I am not Paul Watson

David Stone12-Nov-02 8:07

David Stone

12-Nov-02 8:07

When Steve Jobs left Apple, he went to NeXt..creators of the Windowing system for FreeBSD. So when he came back to Apple, he incorporated FreeBSD into the MacOS. Also, the OSX themes look a lot like NeXtStep's do...

Ray Cassick13-Nov-02 7:23

Ray Cassick

13-Nov-02 7:23

What is there for GUI applications?

MacForms?

.NET redistributable related

James T. Johnson13-Nov-02 7:37

James T. Johnson

13-Nov-02 7:37

To my knowledge the SSCLI doesn't contain anything for GUI applications nor Data access. I imagine with the SSCLI supporting OS X its only a matter of time before some people get together and create something.

James

- out of order -

Shamoon11-Nov-02 16:56

Shamoon

11-Nov-02 16:56

For any application developed in C#, it is necessary to have .NET redistributable installed on the target machine otherwise the application will not run.

I've heard that the size of .NET redistributable is about 25 MB and of course it is necessary to include it with our setup program no matter how small our application is.

Is it possible that the size of redistributable that we provide is less than 25 MB, just including only those dependencies that are utilized by our samall appication ????

Re: .NET redistributable related

David Stone11-Nov-02 18:43

David Stone

11-Nov-02 18:43

No. Because the Common Language Runtime needs to be there...plus all the base classes in the framework. So you have to ship the entire thing with your app.

Re: .NET redistributable related

RichardEastes13-Nov-02 15:55

RichardEastes

13-Nov-02 15:55

This is a huge problem with .NET

If you're a small company and generally don't distribute your apps on CD, .NET is severly limiting your potential market.

I've managed to compile C++ 6.0 using Studio.NET and the final exe does not require the 22MB framework but I have been unsuccessful with VB.net

I agree that EVENTUALLY, everyone will have the framework installed, but untill then, would you download a 22.1MB application or a 100Kb application?

Rick Eastes.
http://www.eastes.net

ActiveDirectory ldap

Anonymous11-Nov-02 10:01

Anonymous

11-Nov-02 10:01

I try to read the ActiveDirectory with DirectoryEntry an DirectoySearcher Class.
Can someon tell me how to read all Users of the ActiveDirectory.

Soap serialization

Gerosa11-Nov-02 6:00

Gerosa

11-Nov-02 6:00

When I do a webservice that has a soap element declared as int, the soap serialization attributed zero for it, if I don't pass him in the soap message.
Anybody knows how can I change the default value? Or avoid the serializtion attributed zero for the variable.
I was making my webservice in C#.
Thanks.

Password Encryption

Derek Lakin11-Nov-02 3:41

Derek Lakin

11-Nov-02 3:41

I use the code described below to one-way hash a supplied user's password to verify it against the one-way hashed password stored in a database.
While the code works and provides the functionality I am looking for I am not convinced that it does it in the quickest/most elegant/most sensible/safest way.
Any ideas for improvement?

// Convert the supplied password into a char array
char[] password = new char[50];
System.IO.StringReader reader = new System.IO.StringReader(this.textBoxPassword);
reader.Read(password, 0, 50);

// Copy the char array into a byte array for encryption
byte[] bPassword = new byte[50];
for(int i = 0; i < 50; i++)
{
	bPassword[i] = (byte)password[i]);
}

// Hash the password
System.Security.Cryptography.SHA1 shaM = new System.Security.Cryptography.SHA1Managed();
byte[] hash = shaM.ComputeHash(bPassword);

// Convert the hash into a char array
char[] cHash = new char[hash.Length];
for(int i = 0; i < hash.Length; i++)
{
	cHash[i] = (char)hash[i];
}

// Create a string from the hash for db verification
string hashword = new string(cHash);

// ... Perform db verification

Re: Password Encryption

Daniel Turini11-Nov-02 3:47

Daniel Turini

11-Nov-02 3:47

I understand your pain.
There's a conceptual error here: you are assuming a byte is a char. This is only true in ASCII Encoding.
For the first for loop, check the System.Text.Encoding classes.
For the second for loop, I would use a Convert.ToBase64String to assure you'll not generate "weird" chars, although the resulting string will grow 33%.

lazy isn't my middle name.. its my first.. people just keep calling me Mel cause that's what they put on my drivers license. - Mel Feik

Re: Password Encryption

Furty13-Nov-02 16:07

Furty

13-Nov-02 16:07

This is the way I'd do it:

System.Security.Cryptography.SHA1 shaM = new System.Security.Cryptography.SHA1Managed();

byte[] hash = shaM.ComputeHash(System.Text.UTF8Encoding.UTF8.GetBytes(bPassword));

string hashedPassword = System.Convert.ToBase64String(hash)

Subclassing?

Stan Shannon11-Nov-02 2:19

11-Nov-02 2:19

Is there a .NET equivalent to subclassing controls in a dialog box as on the Win32 side of things? I need a little more control over a textbox than the standard .NET API allows.

"Any clod can have the facts, but having opinions is an art."
Charles McCabe, San Francisco Chronicle

James T. Johnson11-Nov-02 3:11

James T. Johnson

11-Nov-02 3:11

Create a new class inheriting from TextBox, add your functionality, then use that class on your Form.

Or use event handlers attached to a TextBox, but this is only good for having the TextBox do additional work, not change/stop the work it does.

James

- out of order -

Stan Shannon11-Nov-02 3:45

11-Nov-02 3:45

Thanks. I've actually done that, but it does not represent a complete solution for what I am trying to achieve.

The form still owns the control and defines it's behavior. So, for example, even if I override the TextBox's OnPaint method and attempt to use the Graphics object to draw in the client area of the text box - the form's default behavior still overrides what I want the control to do.

The only way I am aware of to gain ownership of a control is to actually subclass it so that I can control its internal behavior - as commonly done in Win32.

"Any clod can have the facts, but having opinions is an art."
Charles McCabe, San Francisco Chronicle

Paul Watson11-Nov-02 4:00

Paul Watson

11-Nov-02 4:00

Stan Shannon wrote:
The form still owns the control and defines it's behavior. So, for example, even if I override the TextBox's OnPaint method and attempt to use the Graphics object to draw in the client area of the text box - the form's default behavior still overrides what I want the control to do.

(I may not understand your situation right so this may not be what you are asking)

Then you need to override the Paint member inside your inhereted control.

e.g. In my CP+ app I did the following to provide a underlined look on DataGrid cells (this is C# but should be easy enough for other languages):

First I inhereted the DataGridTextBoxColumn (subclass I assume):

public class DataGridLinkColumn : DataGridTextBoxColumn

then I overrode the Paint event:

protected override void Paint(Graphics g,Rectangle Bounds,CurrencyManager Source,int RowNum, Brush BackBrush ,Brush ForeBrush ,bool AlignToRight)
{
    g.FillRectangle(BackBrush, Bounds.X, Bounds.Y, Bounds.Width, Bounds.Height);
    FontStyle fstylNew = new FontStyle();
    fstylNew = FontStyle.Underline;
    System.Drawing.Font font = new Font(System.Drawing.FontFamily.GenericSansSerif , (float)8.25, fstylNew);
    g.DrawString( GetColumnValueAtRow(Source, RowNum).ToString(), font ,Brushes.Blue ,Bounds.X ,Bounds.Y );
}

Is that what you are looking for?

Paul Watson
Bluegrass
Cape Town, South Africa

Ray Cassick wrote:
Well I am not female, not gay and I am not Paul Watson

Stan Shannon12-Nov-02 0:48

12-Nov-02 0:48

Thanks, Paul. With the TextBox, even when "subclassed", the Paint event handler is never called. I assume this is because the parent class (in the windows sense) is processing the message via the parent Form.

I found a work-around, but to me this is just another example of why .NET is not yet an optimum development environment.

"Any clod can have the facts, but having opinions is an art."
Charles McCabe, San Francisco Chronicle

Martin Haesemeyer13-Nov-02 6:49

Martin Haesemeyer

13-Nov-02 6:49

You can override the WndProc function and intercept WM_PAINT. By overriding WndProc IMHO you should be able to do everything you could by Win32 subclassing.

Cheers
HTH
Martin

"Situation normal - all fu***d up"
Illuminatus!

Stan Shannon13-Nov-02 7:08

How do I catch ListView's scrolling?

13-Nov-02 7:08

Thats sort of what I was thinking also, I just wanted to hear someone else say it. I don't want to spend a lot of time right now going down that road only to run into more unexpected issues, but I might try it in the near future. Thanks.

"Any clod can have the facts, but having opinions is an art."
Charles McCabe, San Francisco Chronicle

8-Nov-02 2:01

I want to catch the "SCROLL" events on a ListView control,
in order to code something like a dynamic populating ListView.
Someone knows about that?

Re: How do I catch ListView's scrolling?

Stan Shannon11-Nov-02 2:24