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Hi,
This morning I thought I'll 'quickly' do a POC on a nice thought. The thought involved creating a UserControl, adding a DependencyProperty to the control, setting the value of the property by binding it to a property I have on a class (in XAML declaration), the instance of the class coming from an ObservableCollection and the control is the ItemTemplate in a ListBox, very simple...
until the DependencyProperty never got set by the binding...
I have gone through more than 20 supposed solutions, not 1 of them working when I implement it... If I bind a static resource to the property it works...
Can someone please build me a simple Silverlight project that achieves the above so that I can use it to regain my sanity... Please do not paste code snippets in this response, please send me the zip of the project, I've gone through too many snippets today (I suspect that my sanity stayed behind in one of the snippets  ) (If I can be pickey, SL4 in VS2010 please)
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Be brave little warrior, be VERY brave
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Anyone??? PLEASE HELP!
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Be brave little warrior, be VERY brave
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I am playing with MVVM.
I'd like to have :
Views in their own project - so I can hive off the project to designers
ViewModels in their own project - which should essentialy serve as teh developers version of the Gui (i.e. the developers don't need to know what it looks like, just make sure the data is provided and updated and functions provided)
Models in their own project - because it seems sensible to me.
Now in addition to all this, it would seem logical to me to have a Controller.
By this I mean a singleton class that 'controls' the application - it provides views and viewmodels, links them together and provides functionality for the viewmodels (e.g. using services to get data, store data, and acting as a 'communicator' between viewmodels (by messaging or events or whatever)
Now it's late and I am tired (and fairly thick), so I am probably missing something really obvious, but where can I stick my controller class?
The View project needs a reference to the ViewModel project (for binding)
The Controller needs a reference to both the ViewModel and View projects (as the controller will instantiate them both)
The controller needs a reference to the model project (so it can make the model data available to the ViewModels)
But (and here's the crux of my problem) the ViewModel needs a reference to the Controller (so it can achieve functionality)
How can I get this to happen without circular references?
I could obviously have the view, ViewModel and Controller all in the same project - but really would prefer not to.
I could do without the Controller and have my ViewModels handle all that stuff directly - but I want to treat my ViewModels as, well, View Models.
Thanks in advance for any advice.
___________________________________________
.\\axxx
(That's an 'M')
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Have just once controller class that knows about all view models. Every view model can access this controller via an interface to the controller. Your circular reference is gone (well somewhat gone).
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.
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Yes - I think an interface is the way to go. I was intending on a single controller instance that knows about all view models (it will be instantiating them).
But the View model needs an instance of the Controller - so I guess I will have to set the IController property of the ViewModel when the Controller instantiates it.
Thanks
___________________________________________
.\\axxx
(That's an 'M')
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May I recommend that, instead of this approach, you take a look at the work that Marlon Grech did on MefedMVVM[^]. This simplifies the whole architecture quite significantly, and will give your designers that warm gooey feeling.
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Pete O'Hanlon wrote: May I recommend that
Yes indeed, of course you may.
I just really didn't want to use a framewrk - because I find that I learn by doing - so by developing my own methodology, making mistakes, and fixing them, I understand the underlying issues. Then I can use a framework.
But Maron's stuf does look interesting -so looks like it's yet another framework I'll have to download and play with!
Thanks
___________________________________________
.\\axxx
(That's an 'M')
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If you need help, just ask - I helped Marlon develop it.
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Hi,
I want to draw too many shapes in canvas (Rectangles, ellipses, etc.). For that, i need the drawingContext.
How can i create and attach the drawingContext in Canvas control.
Is there any other simple way to do so?
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To get the drawing context, you can simply override the OnRender on a derived canvas object.
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hi..... to all....
i'm new to silverlight ...
my doubt is.... for ssrs reports there's an BIDS( bussiness intellegent development studio) ..
now i want to design reports in silverlight reporting services is there any development studio for
silverlight reporting services.... if yes please give me the download site... i want to download...
please help me....
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Reporting services reportviewer is not supported in silverlight - you need to call an ASP page for the viewer.
RS development is not done in Silverlight, there is no BIDS done in SL.
There is a 3rd party SL reportviewer but it costs $500.
Never underestimate the power of human stupidity
RAH
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ok.... but how can i design silverlight reports.. in silverlight application..
i've worked on crystal reports , ssrs, and now silverlight reports..
but i cant get were to design the silverlight reports...
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I used this article [^]as the basis for my solution.
Never underestimate the power of human stupidity
RAH
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sorry for that ..
but i really dont know... about it....
i got one more thing ..
whether i can download stimulsoft report designer.silverlight..
whether it can help me?
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Sorry I have no knowledge of component source products
Never underestimate the power of human stupidity
RAH
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ok.... tell me that...
again sorry for my stupidity..
can we create a silverlight reports as we create ssrs reports and crystal reports..
just give me breif knowledge...
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SSRS is not in silverlight so no you cannot create an SSRS silverlight report.
You can create an SSRS report using vs 2005/8/10 and display it via an ASP.net reportviewer that is a popup from a silverlight application. This is what the article demonstrates!
Never underestimate the power of human stupidity
RAH
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ok.... i was giving just an example of ssrs reports...
now live the topic of ssrs reports..
coming from first
whether there's an option of creating an silverlight reports ?
if yes how to create...?
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No. Silverlight does not support reporting services.
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.
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How can you check if Mouse is ButtonDown from MouseMove handler...?
I have a popup, I want to close a child control when the popup is moving (i.e. [mouse down + mouse move], not just mouse move which happens all the time when mouse is inside the popup)
private void SomeUserControl_MouseMove(object sender, MouseEventArgs e)
{
if(Mouse.IsRightButtonDown)
{
// Close a child control
}
}
Thanks
dev
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Here[^] is a work around that may help you achieve what you want.
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.
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Short(er) and sweet version:
The application starts up and looks fine. Open a couple modal windows and they look as they should. The screen opens normally (not maximized or minimized) and fills up the screen. There is a label that stretches across the top of the screen and a gradient background that goes from a very dark gray to a very light gray. If I maximize or minimize the background of the form becomes very choppy. It is no longer a smooth gradient. It looks similar to a screen that doesn't have the color depth to show all the colors. The label at the top has thick line going through it the same color as its background color. The modal windows are completely black on the top half. Plus the application will not close properly. I have to use Task Manager to close it.
Any ideas what could be wrong?
Gory details:
There's another application of ours on the system that uses OpenGL to show 3D models and animations. When the WPF application was installed on the computer, the animations quit working. The static 3D model would still show up, but there would be a blank screen when the animations were being shown. We didn't have the problem with WPF application at this point.
It's important that the animations show because it validates what the operator is telling the machine what to do. We loaded new graphics drivers and the animations worked again. However, it created the problem mentioned above.
Is there some incompatibility between WPF and OpenGL? I don't get why it's one or the other.
[Added]
Three points that don't make sense to me are:
Point 1: This sequence
1) OpenGL static image works, OpenGL animation works.
2) Install .NET and application. WPF works, OpenGL static image works, OpenGL animation broken.
3) Install graphics driver: WPF broken (only after resizing main window), OpenGL static image works, OpenGL animation works.
Point 2: Why it will show the OpenGL static images, but not the animation. I don't think the commands to draw the image are any different between the two. Maybe it has to do with swapping the buffers?
Point 3: Why WPF will display fine until you resize the main window.
Thank you for any help.
Brad
Deja Moo - When you feel like you've heard the same bull before.
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Somewhere in between all those gory details I would check if I have the latest drivers (video and Open GL) for the display card installed.
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.
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That's what caused the problem with the WPF side fo things. I even tried going back a version with the driver and still the same results.
Three points that don't make sense to me are:
Point 1: This sequence
1) OpenGL static image works, OpenGL animation works.
2) Install .NET and application. WPF works, OpenGL static image works, OpenGL animation broken.
3) Install graphics driver: WPF broken (only after resizing main window), OpenGL static image works, OpenGL animation works.
Point 2: Why it will show the OpenGL static images, but not the animation. I don't think the commands to draw the image are any different between the two. Maybe it has to do with swapping the buffers?
Point 3: Why WPF will display fine until you resize the main window.
Brad
Deja Moo - When you feel like you've heard the same bull before.
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