Re: Creating an instance of SelectionChangedEventArgs in wpf - WPF Discussion Boards

28-Sep-10 22:55

Just because there's a SelectionChangedEventArgs parameter there, it doesn't mean you have to pass anything to it. If you don't actually do anything in the method with the value e, you can simply pass null in as the parameter.

lstMyView_SelectionChanged(lstMyView, null);

Similarly, if you don't do anything with sender, you can always pass null in there.

A simpler technique would be to move the functionality that lstMyView_SelectionChanged implements out into a separate method and call that directly (and from the event handler as well).

Now that we've covered that, I would urge you to look into MVVM to stop relying on the code behind here. If your method is updating a model in some way, you really should separate it out of the view specific code (obviously, if you are just triggering an animation or other view option then what you are doing here is perfectly fine and shouldn't be refactored outside the view).

I have CDO, it's OCD with the letters in the right order; just as they ruddy well should be

Forgive your enemies - it messes with their heads

Re: Creating an instance of SelectionChangedEventArgs in wpf

dashingsidds28-Sep-10 23:01

dashingsidds

28-Sep-10 23:01

hi Pete,

I cannot pass null to the parameter because i am doing something with e in inside the handler. Sorry to have not mentioned it here.

Regards,

Samar

Re: Creating an instance of SelectionChangedEventArgs in wpf

Pete O'Hanlon28-Sep-10 23:24

28-Sep-10 23:24

Really, you shouldn't be calling the event handler directly - you should use a method that accepts the arguments you are interested in and call that from your event handler. Here[^] is more information on what the constructor takes; as a hint, a question like this could be easily answered for you by looking up the documentation in MSDN.

I have CDO, it's OCD with the letters in the right order; just as they ruddy well should be

Forgive your enemies - it messes with their heads

Re: Creating an instance of SelectionChangedEventArgs in wpf

dashingsidds28-Sep-10 23:43

dashingsidds

28-Sep-10 23:43

Hi Pete,

The link you have provided gives just a general information on "SelectionChangedEventArgs" class. Also even if I create a method as you have told still i would need to initialize the class somewhere in the said method, right? Or maybe i am not able to understand what you are trying to say. Can you please give me a small code snippet of the functionality you mentioned? Thanks for your valuable time here.

Regards,

Samar

Re: Creating an instance of SelectionChangedEventArgs in wpf

Pete O'Hanlon29-Sep-10 0:58

29-Sep-10 0:58

You don't need to initialize the class in the method - all you need to do is have a method that accepts the relevant IList(s) that you are interested in, and work with it there. For instance:

private void MyMethod(IList addedItems, IList removedItems)
{
  // Do something here.
}

Then all you need do in your event handler is call

MyMethod(addedItems, removedItems);

I have CDO, it's OCD with the letters in the right order; just as they ruddy well should be

Forgive your enemies - it messes with their heads

Re: Creating an instance of SelectionChangedEventArgs in wpf

dashingsidds29-Sep-10 1:24

dashingsidds

29-Sep-10 1:24

Hi Pete thanks for your answer. This looks good. Just 1 question. Say I have a listview with 5 items in it and that the 2nd item is selected then "addedItems" is the 2nd item and "removedItems" are the rest of the 4 items. Am I right on this part?

Regards,

Samar

Re: Creating an instance of SelectionChangedEventArgs in wpf

Pete O'Hanlon29-Sep-10 1:30

29-Sep-10 1:30

Not quite. AddedItems refers to the items that were added to the selection since the last time the event was fired, and RemovedItems refers to the items that were removed from the selection since the last time the event was fired. This means that the changes effectively represent deltas and are cumulative.

I have CDO, it's OCD with the letters in the right order; just as they ruddy well should be

Forgive your enemies - it messes with their heads

Which obfuscator can I use?

Aseem Sharma28-Sep-10 8:06

28-Sep-10 8:06

Hi friends,

I have made a small application using WPF. Now I want to obfuscate so that no one can steal my algorithms. Also so that no one can break my licensing mechanism.

I did try trial/free versions of some tools like Dotfuscator, Eazfuscator, Babel etc. But in these trial versions, my application get crashed while executing its one or other functionality. It might be because vendor don't want us to use application obfuscated with their free/trial versions.

Can anybody suggest me a free Obfuscator which provide reasonable/moderate security but no crash or serious bugs in obfuscated assemblies?

Thanks in Advance
Aseem

Pascal Hubert28-Sep-10 8:28

Pascal Hubert

28-Sep-10 8:28

Hi,

A free one : NET NamesObfuscator

Take a look over there : http://pipiscrew.com/ in 'Freewares 4 developers' section.

Best regards.
neojudgment

Aseem Sharma28-Sep-10 17:51

28-Sep-10 17:51

Hi Neojudgment,

Thanks for the reply. Today I'll try to use NET NamesObfuscator and will get back to you with my findings. Hope it will work for me.

Best Regards
Aseem

Aseem Sharma30-Sep-10 20:19

30-Sep-10 20:19

Hi Friend,

I found the same problems with NET NamesObfuscator what I found with others. Then I tried Babel. Its trial version is also causing crash to my application. But it has some option which we can turned ON/OFF. It served my purpose. I think Babel is a very good obfuscator. One problem with it is that it has a command line UI not GUI.

Regards
Aseem

Pete O'Hanlon28-Sep-10 9:00

28-Sep-10 9:00

Aseem Sharma wrote:
Now I want to obfuscate so that no one can steal my algorithms. Also so that no one can break my licensing mechanism.

I'm sorry to tell you this, but if you have .NET code then it can be read - the obfuscated code makes it harder, but not impossible to break your algorithms.

I have CDO, it's OCD with the letters in the right order; just as they ruddy well should be

Forgive your enemies - it messes with their heads

Aseem Sharma28-Sep-10 17:50

28-Sep-10 17:50

Hi Pete,

Thanks for the reply. I know that I cannot do anything other than just making it harder to read and understand my code. But for my small application, it would be enough. Can you suggest me a free Obfuscator that can obfuscate the WPF code and providing reasonable security?

Regards
Aseem

Pete O'Hanlon28-Sep-10 21:47

28-Sep-10 21:47

I haven't tried it out, but Eazfuscator.NET[^] might be what you want.

I have CDO, it's OCD with the letters in the right order; just as they ruddy well should be

Forgive your enemies - it messes with their heads

Aseem Sharma30-Sep-10 20:20

30-Sep-10 20:20

Hi Friend,

I found the same problems with Eazfuscator what I found with others. Then I tried Babel. Its trial version is also causing crash to my application. But it has some option which we can turned ON/OFF. It served my purpose. I think Babel is a very good obfuscator. One problem with it is that it has a command line UI not GUI.

Regards
Aseem

an unhandled win32 exception occurred in plugin-container.exe

jmcc2k11-Oct-10 1:32

jmcc2k

11-Oct-10 1:32

Crypto Obfuscator supports obfuscating WPF assemblies. Try it out.

Manu Viswan27-Sep-10 23:47

Manu Viswan

27-Sep-10 23:47

Hi,

I just started a silverlight 4 application in VS2010, enabling RIA services. Installed the Silverlight 4 Tools. and as i debug, i am finding this exception.

an unhandled win32 exception occurred in plugin-container.exe

please help me get throught this as its quite annoying as my VS2010 keeps on crashing. and also the browser reports, the silverlight plugin has crashed. I tried reinstalling VS2010 and SL tools. doesnt work.

Thanks,
Manu

Path.. on buttons dissapearing [modified]

belier127-Sep-10 23:37

belier1

27-Sep-10 23:37

Hello.

I'm new on WPF. I'm trying to use a Path as content of a button. The problem is that using the same path on different buttons, the path is only visible on the last one created.

This is the declaration of the path on a ResourceDictionary

<Path x:Key="CloseGeometry" Fill="{StaticResource DefaultForeground}" Stroke="Transparent"
Data="M 4,4 L 4,16 L 16,14 L 16,20 L 30,10 L 16,0 L 16,6 Z">
</Path>

And this is how I try to use it like button content.

<Button Name="dataEndavantButton" Style="{StaticResource AppButtonStyle}" Content="{StaticResource CloseGeometry}"></Button>

What I'm doing wrong?

Thanks in advance.

modified on Tuesday, September 28, 2010 5:49 AM

Re: Path.. on buttons dissapearing

Abhinav S29-Sep-10 7:51

Abhinav S

29-Sep-10 7:51

This article[^] should help you out.

The funniest thing about this particular signature is that by the time you realise it doesn't say anything it's too late to stop reading it.

My latest tip/trick

Visit the Hindi forum here.

Re: Path.. on buttons dissapearing

belier129-Sep-10 21:19

belier1

29-Sep-10 21:19

Thx a lot for the link. It goes beyond what I expected as answer. It gives me a wider look to the button design... Thumbs Up | :thumbsup:

Best regards, Xavier

Silverlight debugging question

Abhinav S27-Sep-10 18:12

Abhinav S

27-Sep-10 18:12

Does Silverlight 4 (VS2010) allow editing code while debugging?

The funniest thing about this particular signature is that by the time you realise it doesn't say anything it's too late to stop reading it.

My latest tip/trick

Visit the Hindi forum here.

modified on Tuesday, September 28, 2010 12:21 AM

Re: Silverlight debugging question

PumbaPumba27-Sep-10 19:16

PumbaPumba

27-Sep-10 19:16

Great question. If you are using 64Bit machine. It won't allow. Like you, I'm also having the same problem. I haven't checked it with 32-bit machine.

Re: Silverlight debugging question

Pete O'Hanlon27-Sep-10 23:02

27-Sep-10 23:02

No[^].

I have CDO, it's OCD with the letters in the right order; just as they ruddy well should be

Forgive your enemies - it messes with their heads