Topic: Newbie looking for simple C# examples

[SteveK]

Hi,

I've just been through the C# Hello World example here http://www.cadalyst.com/cad/autocad/autocad-commands-c-cad-clinic-civil-3d-tutorial-3069.

Does anyone have any small C# examples I can learn from? An example would be searching a drawing for text that is green and changing it to blue.

And as an aside: is there an ssget equivalent in C#?

Thanks,

steve

[Kerry]

A couple to start with :

http://www.autodesk.com/autocad-net-developers-guide
http://images.autodesk.com/adsk/files/autocad_2010_dotnet_training.zip
http://images.autodesk.com/adsk/files/objectarx_addendum_-_ribbon.exe
http://usa.autodesk.com/adsk/servlet/item?siteID=123112&id=785550  [edit: link fixed]

http://usa.autodesk.com/adsk/servlet/index?siteID=123112&id=1911627
http://through-the-interface.typepad.com/


[added:]
and have a look around theSwamp of course ... there is a bit tucked away here

[fixo]

Hi,

I've just been through the C# Hello World example here http://www.cadalyst.com/cad/autocad/autocad-commands-c-cad-clinic-civil-3d-tutorial-3069.

Does anyone have any small C# examples I can learn from? An example would be searching a drawing for text that is green and changing it to blue.

And as an aside: is there an ssget equivalent in C#?

Thanks,

steve

Here is what you asked about

Feel free to change to your suit

~'J'~

[Glenn R]

Start off by learning the language first - forget the autocad side of it for now, as it sounds like you're at the very beginning. You'll be glad you did in the long run.

[SteveK]

http://through-the-interface.typepad.com/

Cheers Kerry, that site (above) is quite good. Here's a couple I found I can read through.
Using pickfirst selection
http://through-the-interface.typepad.com/through_the_interface/2006/09/using_the_pickf.html
Creating an AutoCAD layer
http://through-the-interface.typepad.com/through_the_interface/2010/01/creating-an-autocad-layer-using-net.html

Here is what you asked about
Feel free to change to your suit
~'J'~

Thanks very much Fixo! I'll get back to you with questions   

Start off by learning the language first - forget the autocad side of it for now, as it sounds like you're at the very beginning. You'll be glad you did in the long run.

I got plenty of holes in my knowledge, but I know the basics of C++ so I'm gonna see how far I can get with that. 

[SteveK]

Fixo, I just went through your code. It actually made sense! The only thing that looks a bit foreign is the bit bracketed: "using (Transaction..."

Can I ask a few questions?...

1. Where does the object Regex come from? As in the line:

Code: [Select]

newtext = Regex.Replace(dbt.TextString, sFind, sReplace);
2. Is the

Code: [Select]

catch (Autodesk.AutoCAD.Runtime.Exception ex) the common error catcher? Ie, what if I use:

Code: [Select]

catch (...)?

3. What does

Code: [Select]

[assembly: CommandClass(typeof(SelText.TextMod))] at the top of the cs file do?

4. How does autoCAD know to run the Initialize function in InitCommand.cs? Don't we need to call it because it's in a function?

5. Out of interest, do we ever use classes apart from a single class to house our commands?

6. Lastly, I just want to make sure there's no apropos button in SharpDevelop, like there is in the Visual Lisp Editor. And the best thing to use as a quick reference is http://docs.autodesk.com/ACD/2010/ENU/AutoCAD%20.NET%20Developer%27s%20Guide/index.html?

Thanks!!  

steve

[Kerry]

1) System.Text.RegularExpressions.Regex

2) what do you mean by ; catch (...)
You catch exceptions thrown (Please Read The Documentation )

3) not mandatory, but improves loading performances. (Please Read The Documentation )

4) public class InitCommand : Autodesk.AutoCAD.Runtime.IExtensionApplication

5) yes (Please Read The Documentation )

6) You mean Intellisence ?
   re the quick reference : did you see my first link ?

regards
Kerry

[edit]
RTFM changed to Please Read The Documentation

[SteveK]

Kerry, I know you know a great deal, but if you don't want to genuinely help then please don't post! Let someone else.

[Kerry]

Steve

ALL of my answers are correct and relevant to your question.

The (Please Read The Documentation ) is for additional information.

If you expect me ( or anyone) to write a thesis to cover information already included in documentation you will be disappointed I think.

... oh, and you're welcome


RTFM changed to Please Read The Documentation

[SteveK]

Kerry, You expect a thanks when you were being rude? There's a difference between correct and helpful.

You know yourself you posted what you did because you've either seen these questions a hundred times or you've read them countless times in the .NET manual and you think I could have found the answer if I'd searched it or the web.

In answer I have made a search for these questions. And I just like finding out details in a forum. It's how myself and countless others have learnt lisp. Yes I've read a hundred questions that boil down to the same one asked last year, but so long as someone show's an effort to learn I quite enjoy helping them along.

Anyways, that's enough of that. Thanks Kerry, question 1 was beneficial to me.

[Kerry]

How about 4)
do you understand the inheritance implications of  Autodesk.AutoCAD.Runtime.IExtensionApplication

http://through-the-interface.typepad.com/through_the_interface/2006/09/optimizing_the_.html
http://through-the-interface.typepad.com/through_the_interface/2006/09/initialization_.html
http://discussion.autodesk.com/forums/message.jspa?messageID=6287126
http://through-the-interface.typepad.com/through_the_interface/2009/06/a-new-project-wizard-for-autocad-net-development.html

[Kerry]

Regarding 2)

what do you mean by :

catch (...) ?

[Kerry]

Regarding 3)

What does
[assembly: CommandClass(typeof(SelText.TextMod))]at the top of the cs file do?
do

I answered
3) not mandatory, but improves loading performances.

http://www.autodesk.com/autocad-net-developers-guide
http://through-the-interface.typepad.com/through_the_interface/2006/09/optimizing_the_.html

[Kerry]

Regarding 5)

yes.
I have no further comment other than :
If you don't know this I suggest you read Glenn's post

[SteveK]

Thanks Kerry.

2. Ignore this. catch (...) was an afterthought from C++. It doesn't work. My bad.
3. That link is helpful.
4. No I don't understand that, but once again those links put me on the right track I think.
5. It was more a general question I just thought an experienced C#'er could comment on. I'm sure I'll notice when I come across it, was just curious if classes are used in code that run simple autocad commands. I can't think how, and it doesn't matter.

Thanks again Kerry, and sorry I didn't mean to be a blight on your day.