C# Discussion Boards - CodeProject

Arun Bhalla1-Aug-03 6:55

Arun Bhalla

1-Aug-03 6:55

Ista wrote:
But then again exceptions in .NET are very costly and therefore as would work better.

How costly are exceptions in .NET and why? I can see how excessively coding around exceptions would not be smart... but at least in ordinary C++, exceptions aren't really expensive, as far as I know.

Ista1-Aug-03 7:06

1-Aug-03 7:06

http://msdn.microsoft.com/vcsharp/using/understanding/perf/default.aspx?pull=/library/en-us/dndotnet/html/dotnetperftips.asp

this is a link to one article. I spent 2 weeks going from link to link reading about how the CLR reacts and timing. This is a must read:

http://msdn.microsoft.com/vcsharp/using/understanding/perf/default.aspx?pull=/library/en-us/dndotnet/html/fastmanagedcode.asp

nick

I'm not an expert yet, but I play one at work. Yeah and here too.

Philip Fitzsimons1-Aug-03 2:31

Philip Fitzsimons

1-Aug-03 2:31

don't forget "IS"

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/csref/html/vclrfispg.asp[^]

"When the only tool you have is a hammer, a sore thumb you will have."

Ista1-Aug-03 4:47

C# .NET control - Problem in NT 4.0 Help!!

1-Aug-03 4:47

so actually if do an

IS

followed by an

AS

would be much faster if your not completely sure of the object

I'm not an expert yet, but I play one at work. Yeah and here too.

CodeFriendly31-Jul-03 14:09

CodeFriendly

31-Jul-03 14:09

Hi,

I developed a .net control in XP with .NET framework 1.0.
It works fine when used in XP or Windows 2000, but when I use the application in NT 4.0 service pack 6 with .NET 1.0, it simply fails to load ... i get the message "Unable to load file ‘MyControl.SplitButton’"
MyControl.SplitButton is my assembly - MyControl.SplitButton.dll.

Leave alone not working, NT simply fails to even load the asembly (as per the above message).

Do you think I will need to rebuild the assembly in NT 4.0

Any thoughts please....

Re: C# .NET control - Problem in NT 4.0 Help!!

Ista31-Jul-03 16:03

Building and running on other machines.

31-Jul-03 16:03

Check this link out

http://www.dotnet247.com/247reference/msgs/30/150431.aspx

I'm not an expert yet, but I play one at work. Yeah and here too.

mikemilano31-Jul-03 13:19

mikemilano

31-Jul-03 13:19

I have built simple calculation console applications on VS C#.NET and i can not get the applications to run on another system.

The other system is XP Pro with .NET 1.1 installed.

The application error I get when running the app is: The application failed to initialize properly (0xc0000135.) Click on OK to terminate the application.

Can anyone tell me or provide me with a link to help me get past this hurdle?

Re: Building and running on other machines.

Mike Dimmick31-Jul-03 13:31

Mike Dimmick

31-Jul-03 13:31

My first suggestion would be to stick the VS.NET CD into the system it doesn't work on and install the remote debugging tools. Set up a connection between your development box and the remote box.

Then you might be able to work out what went wrong Wink | ;-)

Proper class design

Ista31-Jul-03 12:27

31-Jul-03 12:27

In the IBindingList example on Microsoft they use class properties in a struct.

I have been using provate variables.

What is the proper design?

I'm not an expert yet, but I play one at work. Yeah and here too.

Nick Parker31-Jul-03 18:05

Nick Parker

31-Jul-03 18:05

Ista wrote:
What is the proper design?

C# Class Design Handbook[^]

-Nick Parker

Ista31-Jul-03 18:09

31-Jul-03 18:09

so is this for beginners or programmers who are advanced and just want to polsih off best pratices.

Looks to me like its a beginners book

I'm not an expert yet, but I play one at work. Yeah and here too.

Nick Parker31-Jul-03 18:19

Nick Parker

31-Jul-03 18:19

I haven't read the book, class design could be categorized as both beginners and advanced, knowing the proper way to design a specific class requires a good deal of understanding all of which can start when you are a beginner.

-Nick Parker

Ista1-Aug-03 4:26

1-Aug-03 4:26

Well yeah but I get turned off by books that start out with

"Whats is polymorphism" Its like duh, I've been programming c++ and Java for 5+ years and I'm really more for design patterns than an introduction to programming

I'm not an expert yet, but I play one at work. Yeah and here too.

Nick Parker1-Aug-03 5:44

Nick Parker

1-Aug-03 5:44

Ista wrote:
"Whats is polymorphism" Its like duh, I've been programming c++ and Java for 5+ years and I'm really more for design patterns than an introduction to programming

Well, maybe you should check out Design Patterns[^].

-Nick Parker

Ista1-Aug-03 5:49

1-Aug-03 5:49

well alrighty then. It looks like a must buy

I'm not an expert yet, but I play one at work. Yeah and here too.

Making a form modeless?

vlusardi31-Jul-03 11:24

vlusardi

31-Jul-03 11:24

Don't see a form property that will allow me to leave a form open while accessing the parent form... how is this functionality achieved...???

thanks,

vince

Ista31-Jul-03 12:24

31-Jul-03 12:24

Form1 fm = new Form1();
fm.Show();

modal is
fm.ShowDialog();

I'm not an expert yet, but I play one at work. Yeah and here too.

vlusardi31-Jul-03 12:35

vlusardi

31-Jul-03 12:35

thanks for the reply... I tried using Form.Show()and it had no effect, still couldn't access the parent form without closing the child dialog... any other ideas...???

There's nothing special about the app, can't understand why it won't let me shift focus to the parent....

thanks for any more help,

vince

Ista31-Jul-03 16:01

31-Jul-03 16:01

something like this

public class FormChild
{

private Form objParent;

public Form Parent
{
get
{
return objParent;
}

set
{
objParent=value;
}

FormChild_Load(object sender, EventArgs e )
{
MessageBox.Show(objParent.Name);
}
}

public Class ParentForm
{
...
Main

FormChild child = new FormChild();
child.Parent = this;
child.Show();
}

That should work, I might mistype though but you have to supply a cycle reference

I'm not an expert yet, but I play one at work. Yeah and here too.

vlusardi1-Aug-03 5:11

vlusardi

1-Aug-03 5:11

Thanks a again for the help....

That's basically how I've coded my main and child form, but still no luck... As I said before, there's nothing special about either of the forms, main is a treeview/listview pair with a "settings" button that launches a child form... child form contains various controls (textboxes, buttons, monthcalendar control, status bar), and the only custom constructor (if you can call it that) accepts a string that is used to initialize a textbox...

Thanks for any other suggestions...

vince

Ista1-Aug-03 5:14