Re: about C# - C# Discussion Boards

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about C#

king2010-Jul-07 0:07

king20

10-Jul-07 0:07

Why C# does not support the multiple Inheritance

Re: about C#

king2010-Jul-07 0:12

king20

10-Jul-07 0:12

C# does not having more than one super class tats y we r using interfacing concept to overcome this.

Re: about C#

Christian Graus10-Jul-07 1:21

Christian Graus

10-Jul-07 1:21

Because it was easier not to, I suspect. You should use interfaces as a poor substitute. Interfaces are cool and useful, but they do not replace multiple inheritence.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Re: about C#

Vikram A Punathambekar10-Jul-07 5:05

Vikram A Punathambekar

10-Jul-07 5:05

I don't know... Stroustrup did it way back in the early 80s. Surely MS in the new millennium should have been able to do it? I think Chintan has the right answer below.

Cheers,
Vıkram.

After all is said and done, much is said and little is done.

Re: about C#

Chintan.Desai10-Jul-07 2:28

Chintan.Desai

10-Jul-07 2:28

let assume following class

class base1{}

class base2{}

class derive{} :base1,base2

Here if both base class has one common method say Method1().Now,during execution if derived class excess Method1(),then derived class will get confuse Confused | :confused:

as from which base class i should get Method1(),therefore they were taken out from C# as well as from java. Rose | [Rose]

Regards
Chintan
www.visharadsoft.com
(Nothing is so purify as KNOWLEDGE)

Re: about C#

Le centriste10-Jul-07 2:41

Le centriste

10-Jul-07 2:41

There also the case where 2 base classes inherit from the same base, you then inherit from those 2 classes.

-----

If atheism is a religion, then not collecting stamps is a hobby. -- Unknown

Re: about C#

Tony Lambert17-Dec-07 12:47

Tony Lambert

17-Dec-07 12:47

> Here if both base class has one common method say Method1().Now,during execution if derived class excess Method1(),then derived class will get confuse

Not really. Smile | :)

This problem has already been solved at a same matter with multiple inheritance interfaces. It could be solved (IMHO with more willing).

For example:

class base1
{
  void Method()
  {
    DoSomethingGood();
  }
}

class base2
{
  void Method()
  {
    DoSomethingVeryGood();
  }
}

class derive : base1, base2
{
  new void base1.Method()
  {
    DoSomethingBad();
  }
  new void base2.Method()
  {
    DoSomethingVeryBad();
  }
}

Re: about C#

PhilDanger10-Jul-07 5:11

PhilDanger

10-Jul-07 5:11

It is VERY easy to abuse multiple inheritance and end up in "M.I. Hell" -- circular references, inheriting methods from each class that have the same name, destructors being called twice because two bases derive from the same base. All of this can be avoided with careful design, but I think it was a case of protecting the programmer from himself (herself).

-Phil

PS. I thought I'd save some time/code while programming a strategy/card game in C++ by having the card inherit from the actual unit so it could read it's stats and display it -- since the Card interface had the same accessor names for these stats I had to overload everything in the card in order to call the correct "versions" of these functions, and no time was saved.

Re: about C#

Scott Dorman10-Jul-07 7:10

Scott Dorman

10-Jul-07 7:10

From the C# Frequently Asked Questions:

http://blogs.msdn.com/csharpfaq/archive/2004/03/07/85562.aspx[^]

-----------------------------
In just two days, tomorrow will be yesterday.

Regular Expressions

dub_beat10-Jul-07 0:03

dub_beat

10-Jul-07 0:03

Hi,

As a project for a friend I need to capture every album name from his website (long story).

Instead of going through page by page I thought it would be a good idea to scrape the html using regular expressions to extract the album names.

1) my first question is, is this the best way to go about it or can any body suggest a better method that I may not be aware of.

The reason I ask for a "better" method is because I've looked up regex for the first time and I'm pretty sure it will take me days to construct a useful expression (I find it hugely complex)

2) The layout of the html source is like this.

-------------------------------------------------------------------------------

<tr class="productListing-odd">
    <td align="center" class="productListing-data"> <a href="http://eatmetalrecords.com/shop/product_info.php?cPath=41&products_id=2118"><img src="images/484_angra9.jpg" border="0" alt="ANGRA Angel's cry lp" title=" ANGRA Angel's cry lp " width="80" height="80"></a> </td>
    <td class="productListing-data"> <a href="http://eatmetalrecords.com/shop/product_info.php?cPath=41&products_id=2118">ANGRA Angel's cry lp</a> </td>
    <td align="right" class="productListing-data"> 33.00EUR </td>
    <td align="center" class="productListing-data"><a href="http://eatmetalrecords.com/shop/index.php?cPath=41&sort=2a&action=buy_now&products_id=2118"><img src="includes/languages/english/images/buttons/button_buy_now.gif" border="0" alt="Buy Now" title=" Buy Now " width="60" height="16"></a> </td>
  </tr>

-------------------------------------------------------------------------------

Based on this Should I first (and can I)
>Find all "image" tags

>Then find all "title" tags within the imgage tags

Any advice to get me up and going in some sort of direction is much appreciated

Thanks

DuB

Re: Regular Expressions

dub_beat10-Jul-07 4:53

dub_beat

10-Jul-07 4:53

Any help??

I had a look at the intro to regular expressions on this site. The examples are mainly on how to deal with bodies of text. there dosnt seem to be much on finding text within html tags?

Any known tutorials on this?

Re: Regular Expressions

Scott Dorman10-Jul-07 7:12

Scott Dorman

10-Jul-07 7:12

Take a look at the HTML Agility Pack[^]

-----------------------------
In just two days, tomorrow will be yesterday.

Re: Regular Expressions

Jimmanuel10-Jul-07 7:32

Jimmanuel

10-Jul-07 7:32

Scott's link looks like it might help you, but if you don't like that then Regex is probably the way to go. I'm not a Regex master so unfortunately I can't just spit out the pattern you need but something may already exist at the Regex Library[^]

Re: Regular Expressions

dub_beat10-Jul-07 22:23

dub_beat

10-Jul-07 22:23

I came across the agiltiy pack before but I couldnt figure out how to use it. theres not much documentation.

The regex library is great! found exactly what I was looking for.

Thanks for the replies

Blinking Label

stancrm9-Jul-07 22:59

stancrm

9-Jul-07 22:59

Hello...

Are there any easy ways to make label blinking ?
Instead of using Thread or Timer.

Thanks...

Re: Blinking Label

Bijesh9-Jul-07 23:04

Bijesh

9-Jul-07 23:04

An animated gif file would be the easiest way probably.

Re: Blinking Label

Martin#9-Jul-07 23:07

Martin#

9-Jul-07 23:07

Hello,

I don't think that there is an easier way than using a timer.
But maybe I'm wrong.

All the best,

Martin

Re: Blinking Label

Vasudevan Deepak Kumar10-Jul-07 0:47

Vasudevan Deepak Kumar

10-Jul-07 0:47

http://www.codeproject.com/jscript/Blink_Feature_in_MSIE.asp[^]

Vasudevan Deepak Kumar
Personal Homepage
Tech Gossips

Re: Blinking Label

stancrm10-Jul-07 0:49

stancrm

10-Jul-07 0:49

I'm using WinForm, not ASP.NET.

Re: Blinking Label

Luc Pattyn10-Jul-07 1:34

Luc Pattyn

10-Jul-07 1:34

The easiest way would be a Forms.Timer

Smile | :)

Luc Pattyn

try { [Search CP Articles] [Search CP Forums] [Forum Guidelines] [My Articles] }
catch { [Google] }

Remote Administration of Windows Media Encoder 9 Using C#

ashish_sharma_ait9-Jul-07 22:46

ashish_sharma_ait

9-Jul-07 22:46

I need to Remotely Get Encoder Statistics from a Windows Media Encoder 9 Running on a Remote Computer.

The SDK Documentation, only shows VB and C++ exampls. Is there any way to zaacess it through C#?

Re: C#.Net -- xml parser exception

originSH9-Jul-07 22:29

originSH

9-Jul-07 22:29

You really should wait way longer than 40 minutes before posting again about the same issue and with very little more information!

Spamming the boards won't get an answer any quicker and will probably make some people ignore you.

Working Behind Boxing/Unboxing

mani_iips9-Jul-07 22:20

mani_iips

9-Jul-07 22:20

Hello.

Have been trying to search for the real working behind the concept of boxing/unboxing.

I understand the concept and its utility, but dont know what exactly happens behind the scene as per memory address and the apropos changes in the stack and heap memory.

Any information or reference will be of help.

Thanks.

Re: Working Behind Boxing/Unboxing

originSH9-Jul-07 22:37

originSH

9-Jul-07 22:37

http://msdn.microsoft.com/msdnmag/issues/1200/dotnet/[^]

This article covers the setps that are taken.

Re: Working Behind Boxing/Unboxing

Chintan.Desai10-Jul-07 2:33

Chintan.Desai

10-Jul-07 2:33

www.kirupa.com Rose | [Rose]

Regards
Chintan
www.visharadsoft.com
(Nothing is so purify as KNOWLEDGE)

Last Visit: 31-Dec-99 18:00 Last Update: 25-Sep-24 16:34

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