Personally, I can’t freaking wait. I’m glad its in the winter this year. I’ve always thought it way more appropriate for a November release than summer.

private static void OnConditionPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
WeatherControl weather = d as WeatherControl;
var newValue = (Condition)e.NewValue;
RoutedEventArgs args = new RoutedEventArgs();
args.Source = weather;
weather.OnWeatherChange(null);
}

“Install an AllowPartiallyTrustedCallersAttribute’d (APTCA) assembly in to the client’s Global Assembly Cache (GAC). Use this full trust assembly to proxy calls for the XBAP.”

I am working with an xbap application in Visual Studio 2008. I installed an APTCA assembly in the client’s GAC like you indicated but when I try to run my code I get the following exception:

System.Security.SecurityException: Request for the permission of type ‘System.Security.Permissions.FileIOPermission

Thanks in advance

The controls have been posted to http://silverlightnuggets.com. Thanks!

And you’re right, I had neglected to get myself a Flickr API key … that’s why it wasn’t working for me. I should read your instructions more carefully next time!

–Rajeev

Thanks again,
Yaniv

@Yaniv - feel free to post your questions in the blog comments!

Euro 2008 was not in Italy, but in Austria and Switzerland. The final was in Vienna, Austria.

Enjoying all the pictures from your trip. It’s certainly a great break from hundreds of daily developer posts.

The three sample controls (ModalDialog, ContinuousProgress, and HorizontalWrapPanel) that you included are incredibly useful for people building their own SL apps. May I post demos of these controls to http://silverlightnuggets.com (a Silverlight code sharing site), along with a link back to your blog?

BTW, I downloaded your latest FlickrViewr sample, and it would only work for me when I removed the MinimumVersion=”2.0.30523″ attribute from FlickrViewrTestPage.aspx. That could be a problem on my end, as that has happened to me with other apps as well. I’m just mentioning it in case it helps others. Also, after I got the FlickViewr app to run, it keeps telling me “that user does not exist” even when I type in your user name “scorbette37″ … not sure why. I’m not asking you to investigate, just letting you know.

Thanks!
–Rajeev
rgoel@silverlightnuggets.com

Thanks for the great post. I have a related question. I have already put a lot of time into coding a Windows Forms control which is hosted in a webpage via the tag. But I recently wanted to upgrade it with a WPF control so I tried to add an instance of ElementHost to my control. But the ElementHost’s constructor fails with a “Request failed.” exception. I have given my control FullTrust.

Do you know if this is possible? Do I have to assert a security permission? Or must I rewrite the control from scratch as an XBAP?

Thanks!

I’ve noticed that the control does not trap the mouse movements.

For example; if you press the left mouse button, the control state changes. If you then move the mouse away from the control before releasing the left mouse button, the control is left in an invalid state.

Can this be avoided?

Cheers,

Karl

Thanks!
Karen

When I click on .sln it opens VS 2008, and then gives me the yellow triange with exclamation point message “The project file ‘C:\Users\Art\Documents\…FlikrViewer\FlickrViewr.csproj’ cannot be opened.
The project type is not supported by this installation.”

Think I have a good install of SL2B2…
Hope to get your demo working soon.

Also, I’ve updated the test page (i had forgotten to rename it default.html, and so it was picking up the old version).

The Template works great with only one project but I added a class library DLL to the solution and now I am getting a security permission exception when trying to access a method in that DLL with the XBAP debug configuration from the main application. I edited the class library DLL project file to contain the same configurations as the template. The app works fine when in debug configuration (Windows).

Previously, in another solution (non flexible config) I had a XBAP solution using a class library DLL built with another solution without security problems.

Thanks for any help,
Jody

PME is most often used in place of API when talking about objects. Sometimes it is also refered to as OM or Object Model.

@Neil: yes, you can create a UserControl using states. Today, the expectation around UserControls is that the designer will be creating the states first and then passing it to the control code developers to hook up the states. Therefore, there the tools are not looking at class metadata on UserControls. I have, however, passed on your question to the Blend team.

@John:
- PME stands for “Properties, Methods, and Events”.
- I fixed the typo, thanks!
- The core part actually doesn’t necessarily need to be the whole visual portion. In fact, it’s actually just the center part of the control. (Although, it’s true… this usage of a Part is a bit contrived. Better examples of Part usage is the Thumb part of a Slider, etc. But I wanted to keep things simple in this post.)

But I am still left with a question.

It seems to me that the example could have been accomplished much easer with templating a UserControl. I think I could easily capture hover, disable, and mouse events and use the VSM in blend to rapdily create the same effects.

I must be missing something. Why would I go to the work of building the custom control from scratch. It seems there is something I am still not understanding where method gives some power I would not mormally have.

The transition should simply represent the transition, if possible. Only store actual values from states in the transition for performance reasons, since it increases data redundancy and potential for mistakes. VisualTransition objects should only keep track of the relationships between states.

sorry for spamming your wonderful blog series, btw, with my thoughts on best practices

“In the above example, we discover the “Core” part, which we will use to determine when the control should go into the MouseOver or Pressed states. ”

The subtle assumption here is that the corePart defines the whole visual region of the control and therefore the whole visual hit test. However, just looking at the code given doesn’t tell you that much…

public static readonly DependencyProperty TemperatureProperty = = DependencyProperty.Register(”Condition”, typeof(Condition), typeof(WeatherControl),null);

should have only one equals and should be … DependencyProperty.Register(”Temperature”, … ???

What does PME stand for?

I read your blog for the great WPF articles, but good to know you are at the center of the world today.
Have a great trip.

Have a great time in Spain.

If you have a Windows Mobile device, I find this spb Traveller app really useful for those quick facts (and a ton of other stuff)

http://www.clickapps.com/moreinfo.htm?pid=14026&section=PPC

Cool blog by the way
Cheers

Ian

-
Scott Barnes
Product Manager (WPF/Silverlight)
Microsoft.

It’s hard to critic the pre-release doco, I just hope it gives the full picture as this walkthrough does.
Eg. Control contract, and sample ControlTemplate markup (which shows the VisualStateManager).

I often find theres to much description with Wpf doco, and not enough code markup.

WebClient ignores HTTP headers concerning the encoding of the response. This means that UTF-8 response will incorrectly be decoded using whatever is the default system code-page (and thus break extended characters very easily in an internationalization-dependent fashion). This is most unfortunate; HTTP supports the specification of a character set via the MIME type (or an explicit header) - is there a chance this will be fixed?

Concretely, unless a developer is extremely careful, using WebClient will result in a broken program depending on where the silverlight app is run, and even if the developer is extremely careful, it’s not possible to perform a robust http request using WebClient; instead, a rather complex series of fallbacks must be implemented using HttpRequest. Even without encoding auto-detection, such an implementation is needlessly error-prone and difficult to test, and as such would be a prime candidate for inclusion in WebClient (which seems to be intended to be simple, after all).

Thanks!

With ref to synch calls, i appreciate that asynch are largely preferable and we would be using them if we could but we are building a mapping site which calls to a GIS application for content. This application solely supports synchronous calls and so we are now in a position of looking for another GIS engine or using another web delivery mechanism…

Andy

I’ll be looking forward to Part 2!

The naming convention in Silverlight is slightly different - we are not using the underscore PART_ convention.

Thanks for the skin recommendation - CheckBox is a good control to give an intro on, since it has multiple state groups. But I promise to do a post later that goes into a more complex skin.

Looking forward for this perfect photo screen saver comes out.

=)

A couple of questions from a WPF developer… firstly I understand that the state model will be added to WPF in the future - does this mean we should stop using Triggers in our WPF application and use States instead if we want Blend to support skinning our apps? Will WPF’s inbuilt controls get states added to them?

Secondly, WPF already has the Parts model and it’s recommended by Microsoft to prefix all Parts with the PART_ prefix. Is this still recommended in Silverlight?

Oh - how about in Part2 skinning another control, I’ve already seen lots of examples on CheckBox skinning!

Cheers!
Neil

Could you tell me where can i download video of this presenatation?

Thanks,
Alexey.

What I would like to see is example of searching and downloading YouTube videos. I believe these API are created to build RIA sites that consume you own content, but not the content from other sites, or at least friendly sites.

I wish someone would just say “YouTube and Google Content are just off limits to silverlight, no mater what type of cross domain support we provide”

IS THIS TRUE? if not can you provide a simple example?

Description:

A Live Search box will be shown after you input your keywords and click “GO”. Now the problems lie in that:

1, The result box is displayed behind the Silverlight area; while in reality it is supposed to be displayed in front of the Silverlight. BTW: I set Silverlight area zindex=0 and Search result box zindex=65534 by default.

2, When the result box is displayed behind the Silverlight, the user can still do some operation on the search result box in firefox browser while can not to do anything in IE browser.

These two problems are to be tackled because they have now blocked my work. Maybe the silverlight must be show before all of element. I am eager for you help!

Thanks,
Dan

> For an example
thank you.

may I translate into Japanese and put on my blog about “Silverlight HTTP Networking Stack” part 1 to 3?
(this is machine translation. I am sorry if it is strange English.)

I’m having various issues, especially with the DialogResult class

Rgds,
Arne

(Thanks Michael for the feedback. If you have a specific scenario that you’re blocked on, could you also share it? Thanks!)

God Bless.

Arthur Ochoa
from Orange County, CA

I have some questions though.
Is there some way that i can remove the left and right button when i run in standalone app mode?
And is it possible to run the app in maximized screenstate from start? In WPF application i can set this on the window class but not sure how to do this now.

..Ben

I am trying to use databinding with your HorizonatalWrapPanel but having issues. Not sure if I have to add additional methods to your class to allow for databinding a collection to it.

I was going down the path of creating an ItemsControl and using the HorizontalWrapPanel as the ItemsPaneltemplate and a user control as the DataTemplate in the ItemsControl.ControlTemplate. But when I run it nothing shows up.

Any guidance would be great

thanks
Michael

Just curious, I wonder if the amount of ram used by the interface differs if your resolution is 1920×1280 or something smaller like 1280×1024.

Also curious, VS2008… when opening large projects, wonder if there are a few options that can be changed to speed up the responsiveness on some pentium 4’s. I really notice a difference running it on XP & a P4 3.2Ghz w/ 2gigs RAM V.S. Vista and just a slightly better Pentium D 2.8Ghz w/2gigs of similar speed RAM.

Thanks for the great post!

John

I recommend that you get to Bagan (Pagan) in Burma (Myanmar) before that country opens up…

cheers

Thanks,
Jeff

Anyways, glad you enjoyed…

e.g.

http://myhost/base/accounts(A1094)?orderby=Name