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  • How do I detect whether the sample supplied by VideoSink.OnSample() is right-side up?

    - by Ken Smith
    We're currently using the Silverlight VideoSink to capture video from users' local webcams, kinda like so: protected override void OnSample(long sampleTime, long frameDuration, byte[] sampleData) { if (FrameShouldBeSubmitted()) { byte[] resampledData = ResizeFrame(sampleData); mediaController.SetVideoFrame(resampledData); } } Now, on most of the machines that we've tested, the video sample provided in the byte[] sampleData parameter is upside-down, i.e., if you try to take the RGBA data and turn it into, say, a WriteableBitmap, the bitmap will be upside-down. That's odd, but fairly easy to correct, of course -- you just have to reverse the array as you encode it. The problem is that at least on some machines (e.g., the single Macintosh in our test environment), the video sample provided is no longer upside-down, but right-side up, and hence, flipping the image actually results in an image that's received upside-down on the far side. I reported this to MS as a bug, but their (terse) response was that it was "As Designed". Further attempts at clarification have so far been ignored. Now, I'll grant that it's kinda entertaining to imagine the discussions behind this design decision: "OK, just to make it interesting, let's play the video rightside up on a Mac, but let's turn it upside down for Windows!" "Great idea!" "Yeah, that'll keep those developers guessing!" But beyond that, I can't find this, umm, "feature" documented anywhere, nor can I find any documentation on how one is supposed to be able to tell that a given video sample is upside down or rightside up. Any thoughts on how to tell this?

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  • Find a better control

    - by Budda
    It is necessary to implement the following functionality: There is a rectangle "field", its size is 150x100 pixels. Field is split to locations, each location is 10x10 (totally 15x10 locations on the field). There are few "coins" (5, for example), each of them can be dropped into any location. The list of text messages should be displayed in the drop-down list if any coin is clicked (when any message is clicked, drop-down list should be hidden and coin should display the number of selected message from 0 to 9, for example). That should be done with Silverlight 4.0 I am going to implement custom control "Coin", it will have a view (with a circle), it will display some kind of popup-window (please advise, which one), focus will be set to this window. On "FocusLost" window will be closed (without changing message number), if any message from the list will be clicked then its number will be stored inside of coin. Question 1: is there any control that already has required functionality? Question 2: how to implement "drag-and-drop" of coins to the "field" (lets assume, they will be close to the field)? Any thought or ideas will be helpful. Thanks.

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  • How to create databinding over two xaml files?

    - by BionicGecko
    Hello, I am trying to come to a working understanding of how databinding works, but even after several tutorials I only have a basic understanding of how databinding works. Thus this question might seem fundamental to those more familiar with silverlight. Even if it is trivial, please point me to some tutorial that deals with this problem. All that I could find simply solved this via adding the data binding on a parent page.xaml (that i must not use in my case). For the sake of this example let us assume, that we have 5 files: starter.cs button1.xaml + codeBehind button2.xaml + codeBehind The two buttons are generated in code in the starter(.cs) file, and then added to some MapLayer button1 my_button1 = new button1(); button2 my_button1 = new button2(); someLayer.Children.Add(my_button1); someLayer.Children.Add(my_button2); My aim is to connect the two buttons, so that they always display the same "text" (i.e. my_button1.content==my_button2.content = true;). Thus when something changes my_button1.content this change should be propagated to the other button (two way binding). At the moment my button1.xaml looks like this: <Grid x:Name="LayoutRoot"> <Button x:Name="x_button1" Margin="0,0,0,0" Content="{Binding ElementName=x_button2, Path=Content}" ClickMode="Press" Click="button1_Click"/> </Grid> But everthing that i get out of that is a button with no content at all, it is just blank as the binding silently fails. How could I create the databinding in the context I described? Preferably in code and not XAML ;) Thanks in advance

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  • Silverlight Cream for January 26, 2011 -- #1036

    - by Dave Campbell
    In this all-submittal Issue: XamlNinja, Kevin Dockx, Steve Wortham, Andrea Boschin, Mick Norman, Colin Eberhardt, and Rudi Grobler(-2-, -3-, -4-, -5-). Above the Fold: Silverlight: "Getting an invalid cross-thread exception in Silverlight?" Kevin Dockx WP7: "WP7 Contrib – the last messenger" XamlNinja ISO: "How many files are too many files for isolated storage?" Mick Norman Shoutouts: Telerik announced a free WP7 Webinars series that you probably don't want to miss: Join Us for the Special Free Windows Phone 7 Webinars Series. Guest lecturers - Shawn Wildermuth and Mark Arteaga From SilverlightCream.com: WP7 Contrib – the last messenger XamlNinja has a great post up extending Laurent's IMessenger to deal with a tricky issue of trying to fire a message from one VM to another even if the 2nd VM isn't alive yet... oh, and this is in WP7Contrib, so go grab it! Getting an invalid cross-thread exception in Silverlight? Kevin Dockx has a solution to a problem we've all had... the 'invalid cross-thread exception' ... and the solution is even for those of us trying to do this in a VM... cool and easy solution, Kevin! Mastering Storyboards One Mistake at a Time Steve Wortham is back with a tutorial with a great title :) ... check out the progression from one success to another in this picture/title viewer ... don't miss the very end where he has the control rolled up into a CaptionedImageHyperlink, and a link to download it! Windows Phone 7 - Part #2: Your First Application Andrea Boschin has part 2 of his SilverlightShow WP7 series up. Lots of good intro material here on the manifest file and app.xaml ... he even gets into the ApplicationBar, phone orientation, and the Metro theme. How many files are too many files for isolated storage? Mick Norman alerted me to his blog early this morning, and this is his latest post... interesting tests of how many files are too many for ISO on your WP7... and I have to admit... he's stuffing a boatload of them out there in these tests! ... great info Mick! and thanks for the links. A Navigator Control For Visiblox Time Series Charts Colin Eberhardt's latest post is about creating an interactive navigator for large time series datasets in Visiblox charts.... check the images at the top of the post, and it'll be obvious :) ... very cool stuff. MVVM Frameworks with WP7 support Rudi Grobler has been very busy and if you check the dates, these posts are all in a day or two! This first highlights two contenders for MVVM on WP7: Caliburn and MVVMLight... both well-supported... quick intro to each followed by good links out to the author's sites Reading barcodes from your WP7 device Rudi Grobler also has a cool post up on reading barcodes with your WP7... he's using the ZXing Barcode Scanning Library, and makes quick work of the job. Taking Sterling for a Test-Drive Rudi Grobler has a quick intro to Sterlink, Jeremy Likness' ISO database for Silverlight up... quickly taking care of writing and reading back data. SQLite on WP7 After his discussion of Sterling, Rudi Grobler is now demonstrating the use of SQLite that has been ported to WP7. Check out his demo code... looks pretty easy to use. Hacking the WP7 Camera (The basics) Rudi Grobler's latest post is on getting direct access to the camera on WP7... be sure to do all the downloads and check out the external links he has. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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  • GDD-BR 2010 [2E] Building Business Apps using Google Web Toolkit and Spring Roo

    GDD-BR 2010 [2E] Building Business Apps using Google Web Toolkit and Spring Roo Speaker: Chris Ramsdale Track: Cloud Computing Time: 14:40 - 15:25 Room: sala[2] Level: 201 Who says you can't build rich web apps for your business? Follow along in this session to learn how you can use the latest integrated set of tools from Google and VMware to take your internal business apps into the cloud. We'll cover how to get started using GWT with Spring Roo and SpringSource Tool Suite (STS), as well as the new data presentation widgets and MVP framework that will be available in the 2.1 release of GWT. From: GoogleDevelopers Views: 69 0 ratings Time: 45:56 More in Science & Technology

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  • Silverlight Cream for December 12, 2010 - 2 -- #1009

    - by Dave Campbell
    In this Issue: Michael Crump, Jesse Liberty, Shawn Wildermuth, Domagoj Pavlešic, Peter Kuhn, James Ashley, Sara Summers, Morten Nielsen, Peter Torr, and Tau Sick. Above the Fold: Silverlight: "Silverlight 4 – Coded UI Framework Video Tutorial" Michael Crump WP7: "Windows Phone From Scratch #12–Custom Behaviors (Part I)" Jesse Liberty From SilverlightCream.com: Silverlight 4 – Coded UI Framework Video Tutorial Michael Crump posted a video tutorial today on the Coded UI Test Framework that we got with the VS2010 Feature Pack 2. Wanna create automated tests? ... check out Michael's video and save yourself some time. Windows Phone From Scratch #12–Custom Behaviors (Part I) Jesse Liberty posted his Windows Phone from Scratch number 12 today... and it's on Custom Behaviors... cool stuff... need to read this and get your head around it... this is part 1, jump on it before he drops part 2 on us! The Next Application Platform? All of them... Shawn Wildermuth has a thought-provoking post up ... check it out and see if you're ready to join him on the adventure of building for all the platforms... Windows Phone 7 Accelerometer Test App Domagoj Pavlešic has a test app up for the accelerometer on the WP7 ... if you need to use it, and are having problems, a good example always helps me. Protocol of developing an animation texture tool Peter Kuhn found a need for a tool to creat some animations for an WP7 XNA game... so he challenged himself to write it, and detailed out all his steps as he went. Re-examining WP7 Launchers and Choosers James Ashley's most recent post is on the Pivot Control ... check this out... add a working Horizontally oriented slider to a pivot... plus some external links to help out New Prototyping Sketch Sheets for WP7 This is one of those posts that I had to go to SilverlightCream and make sure I hadn't hit it yet... pretty cool prototype sheets for WP7 by Sara Summers ... we've seen others, they're all good. Simulating GPS on Windows Phone 7 Morten Nielsen helps you get around the fact that you're not going to be able to use the emulator for testing your GPS app ... at least not without some assistance... and that doesn't mean hauling your dev system around your neighborhood, either. How to correctly handle application deactivation and reactivation We've seen posts on Tombstoning, but probably not from Silverlight team members... check this one out from Peter Torr ... great even sequence information and all the info on how to correctly handle it, plus external links to the documentation... you knew there was documentation, right? :) Localizing a Windows Phone 7 Application Tau Sick has a post up discussing Localization and your WP7 apps... coming from soneone with an app in the marketplace in 3 languages, it's a pretty good bet he's got it figured out! Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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  • Free SEO Analysis using IIS SEO Toolkit

    In my spare time Ive been thinking about new ideas for the SEO Toolkit, and it occurred to me that rather than continuing trying to figure out more reports and better diagnostics against some random fake sites, that it could be interesting to ask openly for anyone that is wanting a free SEO analysis report of your site and test drive some of it against real sites. So what is in it for you, I will analyze your site to look for common SEO errors, I will create a digest of actions to do and other...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Free SEO Analysis using IIS SEO Toolkit

    In my spare time Ive been thinking about new ideas for the SEO Toolkit, and it occurred to me that rather than continuing trying to figure out more reports and better diagnostics against some random fake sites, that it could be interesting to ask openly for anyone that is wanting a free SEO analysis report of your site and test drive some of it against real sites. So what is in it for you, I will analyze your site to look for common SEO errors, I will create a digest of actions to do and other...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Generate ASP.NET + AJAX with Ajax Control Toolkit

    Code OnTime LLC announces immediate availability of the free code generator project Web Site Builder for our free ASP.NET code generator. The new code generation project delivers premium functionality at no charge in the hands of ASP.NET developers.   The ASP.NET web applications generated with Web Site Builder are using Microsoft ASP.NET Ajax Extensions and Ajax Control Toolkit. Now you can create stunning applications straight from your database with adaptive filtering, fast sorting...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Best gui toolkit to use for creating 3D board game

    - by UserInteractive
    I have created a board game using Java and Swing - using GridLayout and various other apis. It works properly but the UI looks very very simple. I would want couple of animations like tilting the GridLayoutat any angle. There are pawns on boxes of the GridLayout that I want to be animated when somebody clicks on it. I'm not sure of the right GUI toolkit to use for this. Swing repaint is possible to a limit and cannot be used for a lot of animation and graphics. And I realized after creating the game that Swing is probably not a good tool to create games. Could anybody suggest a better framework to use that I can use it in Eclipse with Java? I was thinking of JavaFX or tools like Adobe Flash or Adobe Air. Any suggestions please?

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  • Chrome Mobile: The Mobile Web Developers Toolkit (Part 2)

    Chrome Mobile: The Mobile Web Developers Toolkit (Part 2) Building for mobile web requires a different mindset than desktop web development, and a different set of tools. The tools we're used to using often aren't available or would take up too much screen real estate. And going back to the dark ages of tweak/save/deploy/test/repeat isn't exactly optimal, so what can we do? Thankfully there are a number of great options - from remote debugging to emulation, mobile browsers are offering more and more tools to make our lives easier. We'll take a look at a couple of tools that you can use today to make cross platform mobile web development easier and then peer into the crystal ball to see what tools may bring in the future. Join us for Part 2 - as we take a look at a some of the many tools to make testing the mobile web easier. From: GoogleDevelopers Views: 0 0 ratings Time: 01:00:00 More in Science & Technology

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  • Chrome Mobile: The Mobile Web Developers Toolkit (Part 1)

    Chrome Mobile: The Mobile Web Developers Toolkit (Part 1) Building for mobile web requires a different mindset than desktop web development, and a different set of tools. The tools we're used to using often aren't available or would take up too much screen real estate. And going back to the dark ages of tweak/save/deploy/test/repeat isn't exactly optimal, so what can we do? Thankfully there are a number of great options - from remote debugging to emulation, mobile browsers are offering more and more tools to make our lives easier. We'll take a look at a couple of tools that you can use today to make cross platform mobile web development easier and then peer into the crystal ball to see what tools may bring in the future. Join us for Part 1 - as we take a look at a few boiler plates, frameworks and helpful libraries for building the mobile web. From: GoogleDevelopers Views: 0 0 ratings Time: 01:00:00 More in Science & Technology

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  • Workaround for UpdateSourceTrigger LostFocus on Silverlight Datagrid?

    - by Dave Lowther
    I have a Silverlight 2 application that validates data OnTabSelectionChanged. Immediately I began wishing that UpdateSourceTrigger allowed more than just LostFocus because if you click the tab without tabbing off of a control the LINQ object is not updated before validation. I worked around the issue for TextBoxes by setting focus to another control and then back OnTextChanged: Private Sub OnTextChanged(ByVal sender As Object, ByVal e As TextChangedEventArgs) txtSetFocus.Focus() sender.Focus() End Sub Now I am trying to accomplish the same sort of hack within a DataGrid. My DataGrid uses DataTemplates generated at runtime for the CellTemplate and CellEditingTemplate. I tried writing the TextChanged="OnTextChanged" into the TextBox in the DataTemplate, but it is not triggered. Anyone have any ideas?

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  • Can a Silverlight application authenticate versus a local LDAP/ActiveDirectory Server

    - by caryden
    If I have an externally hosted application (www.outside.com) outside the firewall but users within a company wanted to be able to enable LDAP authentication against their local (behind the firewall) AD server (acting as LDAP) or other LDAP server (call it ldap.inside.com), how would this be done. It seems technically possible in that when a user tried to login to outside.com through a client-side silverlight interface, that the SL app could connect to the outside.com login service and be told to authenticate that user against ldap.inside.com. The SL app would make the calls to ldap.inside.com to authenticate the user. Of course, there is the issue of how the server is notified securely that the client authenticated itself...Has anyone done this?

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  • SilverLight 3.0 DataGrid LoadingRow Event

    - by Asim Sajjad
    Following are my Question regarding the LoadingRow event of the Datagrid When will it fires after the Row is bound to the data or after that. As if you debug the Silverlight application then of first execution if you type following code ((System.Windows.Controls.TextBlock)(((System.Windows.Controls.ContentControl)(((DataGridRow)e.Row).Cells[1])).Content)).Text if will return empty string but if your datagrid has scroll (which is in my case , my datagrid has scroll), if you scroll down then the LoadingRow firs again and this time it will return Text on that cell?? why it is not return text on first time and return on second time when i press the scroll bar ??? If I paste above code in the cs file then it will return error 'System.Windows.Controls.DataGridRow' does not contain a definition for 'Cells' and no extension method 'Cells' accepting a first argument of type 'System.Windows.Controls.DataGridRow' could be found (are you missing a using directive or an assembly reference?) Can any one help me in these question thanks in advance,

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  • Silverlight DataStateBehavior, initial value not used

    - by JimmySavile
    Hi, I am trying to use the Silverlight DataStateBehavior, it works fine in most cases where I click a button which sets say a 'Selected' Property in the view model to either false or true. The DataStateBehavior then tells the VisualStateManager to go to the relevant state. Like this: <Button...> <i:Interaction.Behaviors> <id:DataStateBehavior Binding="{Binding Selected}" Value="True" TrueState="SelectedVisualState" FalseState="DeselectedVisualState"/> </i:Interaction.Behaviors> </Button> The above works fine. What I am trying to do though is to get it to set the correct state when the application loads, if I were to set the 'Selected' property on the view model to true by default I wouldn't see any changes in the UI until I clicked the button to change the viewmodel property. I know there are several classes involved with the DataState stuff including: BindingListener.cs ConverterHelper.cs DataStateBehavior.cs DataStateSwitchBehavior.cs DataTrigger.cs Any clues would be good, Thanks

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  • Way to concat strings when using binding in Silverlight

    - by Artur
    I wonder if there is a way of concating two strings in Silverlight inside xaml file. I have a DataGrid where one of the columns is 'Default Contact' and I would like to represent data in there as first and last name. <sdk:DataGridTextColumn Header="Default Contact" Binding="{Binding Path=DefaultContact.FirstName}" /> I was thinking about something like: Binding="{Binding Path=DefaultContact.FirstName + " " + DefaultContact.LasttName}" But this doesn't work. I don't even know if this is possible to achieve. Seems like really basic thing so I hope it is supported in some way. Any help would be greatly appreciated.

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  • Page navigation in silverlight 4 using MVVM pattern

    - by Archie
    Hello, I have a a navigation application developed in Silverlight 4. It has a main page which contains a frame. I load a particualr view in that frame and I know that I can use NavigationService to navigate to other page which would be loaded in the same frame. But my question is how it can be done using MVVM? To get the frame do I need to pass the reference of the page? Also, as per my knowledge one view is not aware of any other views. So what is the best way to make them aware of each other? I have heard of Controller and Mediator but how shall I implement them so as to get the Frame of the mainpage? It would be very helpful if anyone can give me the example or probably sample code for this. Thanks in advance.

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  • FloatableWindow resizes Grid in Silverlight

    - by Ben
    I'm trying to use Tim Heuer's FloatableWindow control for a non-modal options window in my Silverlight application. However, I'm running into a problem with the FloatableWindow resizing it's parent grid when it opens. For example, before I open the window the application looks like this: But after opening the window, the first row of the grid expands: I'm currently setting FloatableWindow.ParentLayoutRoot to the LayoutRoot grid in MainPage.xaml. Is this the right thing to do? How can I prevent the grid from resizing when the FloatableWindow opens?

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  • SelectionChanged event binding in Silverlight+MVVM-Light

    - by Budda
    The handler of the "SelectionChanged" event of the ComboBox control has the following signature: void SelectionChangedMethod(object sender, SelectionChangedEventArgs e) How to bind to that property under Silverlight 4 and MVVM-Light to the corresponding method of the ViewModel object? As far as I know, I need to do something like this: public void Changed(Object obj, SelectionChangedEventArgs e) { // .... implement logic here } RelayCommand<Object, SelectionChangedEventArgs> _command; public ICommand ObjectSelectionChanged { get { if (_command == null) { _command = new RelayCommand<Object, SelectionChangedEventArgs>(Changed); } return _command; } } The problem is that RelayCommand class in the MVVM-Light framework doesn't support 2 generic parameters... Is there any solution or workaround for this case? How bind control event to the method with 2 parameters?

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  • Good Silverlight Custom ItemsControl Tutorial

    - by Steve Brouillard
    I'm afraid my Google-Foo is failing me again today. I'm trying to find a good tutorial on creating custom ItemsControls in Silverlight (though I imgaine a WPF version might work as well). I'm trying to create a custom ItemsControl that will be something of a virtualized ListBox. What I'm trying to accomplish isn't really similar enough to the current ListBox control to justify trying to modify the existing control, so I figure a custom one is in order here. I have a vague concept of how to accomplish it, but there are definite holes in my understanding. Thanks in advance

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  • Silverlight DataGrid Header Horizontal Alignment

    - by Brandon Montgomery
    I want to change the alignment of a header on a datagrid in Silverlight, and I can't seem to figure out how to do it. Here's what I have so far: <data:DataGridTextColumn Header="#" IsReadOnly="True" ElementStyle="{StaticResource CenterAlignStyle}" Binding="{Binding OutlineNumber, Mode=OneWay}" > <data:DataGridTextColumn.HeaderStyle> <Style TargetType="prim:DataGridColumnHeader"> <Setter Property="HorizontalAlignment" Value="Center"/> </Style> </data:DataGridTextColumn.HeaderStyle> </data:DataGridTextColumn> No matter what I try, I can't seem to change the default alignment, which appears to be "left."

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  • How to download media content on demand and reuse from browser cache in silverlight

    - by Andrew
    Hi. I have a problem with simple silverlight app, this app has a couple of buttons, each button sets mediaelement source to a short mp3 file and plays it, my problem is that when i press the same button second time it re-downloads mp3 file again but i think it shouldn't, instead it should use a copy of browser cached mp3 file that was downloaded when a button was pressed for the first time. I'm using sl4 and links in mediaelement are just simple uri's, i need to make it working in this way that when some mp3 was downloaded it will be cached on the client browser and further click on button will use a cached version of file instead of downloading it again and wasting my bandwidth. Any ideas ?

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  • Custom Fill Property on PathGeometry in Silverlight

    - by Otaku
    I've been looking at (and getting confused by) Dependency Properties - I'm not sure if this is what I need or if there is something else. I'm looking to something very specific with <Path.Data/> children in Silverlight, in particular <PathGeometry/>, <EllipseGeometry/>, etc. While the <Path/> element has a .Fill property, I'd like to add a .Fill property to any of it's Geometries, meaning it's a different color from it's parent. It could be a <SolidColorBrush/> or <LinearGradientBrush/> color, or a percentage of the parent color (like 20% darker than <Path.Fill/>. Is this possible? Is this a dependency property? How would <RectangleGeometry/>, for example, know that I am trying to fill it with a color? How would I get started? (adding WPF as a tag too as someone who knows WPF may be able to help)

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  • IPhone like scrolling on Silverlight ListBox

    - by Larsi
    Hi! I need a listbox with IPhone-like functionality for Silverlight. That is, animated scrolling, and click and drag to scroll. Scrolling will continue a bit after the mouse up event based on the "speed" of the dragging. I've search and found no control vendors providing this. So question is how should I build it? I need some hints to get started. There's two parts to this question: Part 1, How to get the animated scrolling of the listbox. Part 2, How to build a "draggable" scrolling, I guess I should put a canvas on top and track the mouseevent, and simulate some physics. Some hints here would have been great. Thanks Larsi.

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