Kunal-Chowdhury.com - Microsoft Technology Blog for developers and consumers

Silverlight 4: How can I create customized OOB Window?

As you all know that, the Out-Of-Browser (OOB) functionality in Silverlight is not a new feature. It is available since Silverlight 3. Microsoft added the trusted application behaviour in Silverlight 4 Beta. In addition to this, they introduced one more additional functionality called “Chromeless OOB WIndow” i.e. “Customized OOB Window” in Silverlight 4 RC (Release Candidate). In this article, I will guide you to create a simple customized OOB Window Application in Silverlight 4 RC. After the end of this tutorial, you will be able to create a Customized OOB Window in Silverlight 4 which will look similar to this.


Read the Complete Article @ DotNetFunda.com

"Articles of the day" @ WindowsClient.net on Customizing Visual Studio 2010 Start Page


Today morning I came across one news that, one of my another article on “Tips & Tricks: Customizing Visual Studio 2010 Start Page” came as “Articles of the Day” in Microsoft’s official WPF site: WindowsClient.net. I am really thankful to the entire team who gave my articles such honour.


Read the Original Article @ DotNetSpark.com.

"Articles of the day" @ WindowsClient.net on Visual Studio 2010 New Features

imageOne of my other article “What’s New in Visual Studio 2010” came as “Articles of the Day” in Microsoft’s official WPF site: WindowsClient.net. I am really thankful to the team who are choosing my articles to publish in various forums. This time by DotNetSpark team.

Read the Original Article @ DotNetSpark.com

How can I develop Printing functionality using Silverlight 4?

Silverlight 4 Printing API Demo Silverlight 4 now supports printing functionality using the Printing APIs. Using the APIs, you can now print your whole application screen or a portion of the application. Also, you can customize the look while you printing your part/full application.


In this post, I will step you guys to the depth of the printing API. Don’t forget to share your thoughts. Suggestions are always welcome. This will help me to improve my articles.


"Articles of the day" @ WindowsClient.net on Windows 7 Multitouch (Part-II)


It’s another great day when one of my other article on “Windows 7 Multi-touch Application Development” has been selected in Microsoft official WPF site: WindowsClient.net. It’s a great pleasure for me. Thanks to DotNetFunda Team for the honour.

Read the Original Article @ DotNetFunda.com

Breaking changes in Silverlight 4 RC

Microsoft has just released the Silverlight 4 RC with several changes in the Silverlight runtime & in the Silverlight tools. Though there are couple of changes since Silverlight 3 & since Silverlight 4 Beta but it supports most of the Silverlight 3 applications by using Quirks mode. In some cases your earlier application will break or behave differently.

In this post I will describe you both the breaking changes in Silverlight 4 since Silverlight 3 & Silverlight 4 Beta. But before going to the discussion on the breaking changes, let me tell you what is Quirks mode. Quirks mode is a behaviour by which your previous application will work on the new runtime. Simple example is that, if you have Silverlight 3 compiled application it will try to run in Silverlight 4 (some cases it will fail) using quirks mode but if you compile the same application in Silverlight 4 it will not use the quirks mode and through errors on the changes.


What’s new in Silverlight 4:

  • XAP Signing
  • Custom Chrome Window
  • WebCam/Mic Configuration Preview
  • Text position and Selection API
  • Pinned full screen mode on secondary display
  • Support for Private Browsing
  • RichTextBox XAML clipboard format
  • Elevated apps doesn’t have Sockets Security Restrictions
  • Support for querying printer page size and printable area
  • XmlnsPrefix & XmlnsDefinition attributes has been added


Breaking Changes since Silverlight 3:

So, lets start with describing the breaking changes in Silverlight 4 since Silverlight 3.

  • Mouse Wheel Support - Silverlight 4 controls (ListBox, TextBox, ComboBox, ScrollViewer, Calendar, DatePicker, DataGrid) now have support for Mouse Wheel.
  • Shared BitmapImage Source – Now Silverlight 4 will render the images properly if more than one Image controls are sharing the same BitmapImage source.
  • ImageBrush.ImageSource returns ImageSource – ImageBrush.ImageSource in Silverlight 4 now returns ImageSource instead of UriSource which could be WritableBitmap or BitmapImage.
  • Keyboard Navigation in TabControl – Keyboard navigation in TabControl was a feature in Silverlight 3 having an issue with the TabItem activation. Previously pressing Up Arrow activated the next TabItem and pressing Down Arrow activated the previous TabItem. In this release they fixed it to properly activate the TabItem. In Silverlight 4 if you press Up Arrow it will activate the previous TabItem & pressing Down Arrow will activate the next TabItem.
  • Automation focus in DataGridCell - DataGridCell now receives automation focus when currency changes in the DataGrid, rather than focusing on the other part of the DataGrid.
  • Hit Test while Toggling Full Screen Mode – While toggling full screen mode Silverlight 4 will now rerun hit testing. This allows controls that were under the mouse before toggling to update the MoouseEnter state if necessary.
  • Whitespace handling with Span tag – TextBlock and RichTextArea now accepts text content & creates implicit runs generating whitespaces between inlines separated by CRLF.
  • DisplayMemberPath & ItemTemplate recreates all containers – Silverlight 4 now recreates all containers by invalidating them while there is any change in DisplayMemberPath or in ItemTemplate properties of the ItemControl.
  • New XAML Parser – Silverlight 4 now includes all new XAML Parser along with the previous XAML Parser. As per the runtime version detected in the application manifest it will parse the XAML in the appropriate parser. Apart from that, it has now additional benefits like “Better XAML compatibility”, “Greater parsing correctness & consistency”, “Better feedback error mechanism”, “Performance improvement”.
  • Panels Clear() method calls InvalidateMeasure – If you call the Clear() method of the Silverlight 4 panel it will now explicitly call InvalidateMeasure.
  • Virtualizing Stack Panel now scrolls by 3 lines – Mouse Wheel scroll in Silverlight 4’s Virtualizing Stack Panel will scroll by three (3) lines instead of one (1) line.


Breaking Changes since Silverlight 4 Beta:

If you were exploring Silverlight 4 Beta this section will be most important for you. There are some changes in both the runtime & tool since the beta release. So before starting with that please read the same carefully.

  • Removed TextSelection.CanInsert – TextSelection.CanInsert is now no longer available in Silverlight 4.
  • RichTextArea changed to RichTextBox – RichTextArea now renamed to RichTextBox.
  • RichTextBox.TextDecorations no longer exists – RichTextBox.TextDecoration is not available now. Instead of it you can use Inline.TextDecorations.
  • Default value to RichTextBox.TextWrapping – Silverlight 4 now has a default value of RichTextBox.TextWrapping to Wrap. If you don’t want to wrap your content you have to explicitly set it to NoWrap.
  • HtmlBrush renamed to WebBrowserBrush – In Silverlight 4 HtmlBrush now renamed to WebBrowserBrush.
  • COM Interoperability – COM Interoperability types are now moved to System.Runtime.InteropServices instead of System.Windows.Interop namespace.
  • WebCam/Output Protection Support – There has been a huge changes in the webcam/output protection support:
      • CanEnableHDCP renamed to CanEnableHdcp
      • CanEnableCGMSA renamed to CanEnableCgmsa
      • VGA, DVI, HDMI, LVDS, SDI, UDIExternal, UDIInternal also renamed to similar naming convention
      • VideoFormat.Height and VideoFormat.Width renamed to VideoFormat.PixelHeight and VideoFormat.PixelWidth respectively
      • AsyncCaptureImage call now changed to CaptureImageAsync
  • NotificationWindow – NotificationWindow.Visible property has been changed to NotificationWindow.Visibility

"Articles of the day" @ WindowsClient.net on Windows 7 Multitouch (Part-I)

Today morning when I checked my mail, I saw one mail regarding “Article of the day” from DotNetFunda.com mentioning one of my article titled “Windows 7 Multitouch Application Development (Part – I)” has been selected as “Article of the day” in Microsoft WPF site WindowsClient.Net.


Thank you DotNetFunda team.

Visual Studio 2010 Features – Better Productivity

You guys all know that Microsoft Visual Studio 2010 will be launch on 12-April-2010 worldwide and currently it is in Release Candidate (RC) state. I am exploring it for a while since Beta 2 & found it really useful than the earlier versions. There are lots of features added into the account of Visual Studio 2010 which will improve the productivity of application development. Developers can use it for faster coding, collaborating among the whole team & more. In this post I will describe the new features of Visual Studio 2010 which I already explored. I think this will be beneficial for all.

Multi-targeting Application Development:
Using Visual Studio 2010 you can not only develop applications for the .Net 4.0 but also can use it for the development of earlier versions of the framework. While creating a new project in the IDE you will see the option to select between different types of .Net Framework (i.e. 2.0, 3.0, 3.5 & 4.0).
Depending upon your choice it will filter the project templates in the New Project dialog. If you select “.Net Framework 4.0” it will show all the project types but if you select “.Net Framework 2.0” it will only show the projects supported by .Net Framework 2.0.
Not only this, as Visual Studio 2010 builds on top of Windows Presentation Foundation (WPF), you will find it more useful while searching for a specific project type. Suppose, you want to develop an application for your client in WPF & you are finding it very difficult to search within a huge collection of project types. Don’t worry. There is a “Search Box” right to the dialog for you to help finding the same. Just enter the keyword (in this case “WPF”) & see the magic. While typing, it will auto filter based on the keyword you entered.
Faster Intellisense Support:
Visual Studio now came up with faster intellisense support. It is now 2-5 times faster than the earlier versions. The IDE will now filter your intellisense as you type. Suppose, you want to create an instance of “WeakReference” & due to the search algorithm of the VS2010 IDE, you don’t have to write the full word of the Class. Just type “WR” and it will automatically filter out that & show you “WeakReference” in the intellisense. Try it out.
Editor Zoom Functionality:
You will find this feature useful while you are showing some presentation or doing a webcast. Earlier VS2010 you have to open the options panel & then you have to change the font size of the editor, which was little bit troublesome. Now that issue is gone. You don’t have to follow where to go to change the text size. While inside the editor window, just press the control key (CTRL) and use your mouse wheel to increase/decrease the zoom level.
Faster Assembly loading in “Add Reference”:
In Visual Studio 2010 loading of assemblies in the “Add Reference” dialog is pretty fast. In earlier versions, it freezes the dialog for some time to load all the assemblies. In 2010 IDE, by default it focuses on the “Project” tab & in the background loads the other tabs. In case it is opening the dialog focusing on the “.Net” tab you will notice that instead of loading all the assemblies at a time, it loads those in a BackgroundThread. Thus improving the loading time a bit faster.
Detach Window outside IDE:
Are you working on dual monitor? If so, you will find this feature very useful. VS2010 IDE now supports detaching Window outside the editor. Suppose, you want to detach your “Error”, “Output”, “Solution Explorer” or “Properties” window in the second monitor while working in the editor in the first monitor, you can do that now. Thus it gives you more space in the editor & separating your important windows outside the IDE.
Reference Highlight:
Another feature of Visual Studio 2010 IDE is the reference highlight. By this feature, it will highlight you all the call to that method or member variable, which you can find easy enough to search all the position of the reference wherever it has been called.
Faster Code Generation:
Before discussing about this feature with you, let me ask you a question “Are you using TDD i.e. Test Driven Development?”. If so, you will find this feature not only useful but very much attractive. So, what is that? Wait, lets ask yourself another question “How to write code while doing Test Driven Development?”. Thinking? Right, you have to implement the skeleton of the class & methods first and then you have to write the UnitTestcases to implement the actual logic. VS2010 came up with the excellent feature of generating codes for you. Have a look into the following snapshot:
As you can see, I don’t have a class named “Person” in my project and hence it is marking it as UNKNOWN by highlighting it in Red. If you look into the first snapshot in depth you can find out that though the class is not present in my namespace or even in the project, it is creating the class reference in the intellisense. Great, right? Wait a minute. If you now place you cursor on top of “Person” and press F10 while holding down ALT+Shift, you will see a dropdown comes up in the screen with two menu item asking you to either generate the class for you or generate a new type.
The first option you can find it easy. If you chose that, it will generate a class file named “Person” for you in the project. Lets go for the second choice where you will get more options & will find it much more interesting. This will open up a new dialog “Generate New Type” for you. There you can chose which access modifier you need (private/public/protected/internal), you can chose different types of code to generate (enum/class/struct/interface), you can also modify the location of the class file. You can either put it in the same project or you can chose a different project available in the solution. Not only that, you can also create a new file for the class or append the class in another file. In short, this feature gives you various options to customize.
Same thing is applicable while generating methods. Have a look into that.

Box Selection:
This is another nice feature of Visual Studio 2010. Let’s describe this using an example. Suppose, you declared some properties as public & in near future you want to mark them as internal. How can you do this? You will go and replace the access modifier one by one to internal. Am I right? Yup, in Visual Studio 2010 you can do this work very easily. Press Alt+Shift and draw a Box Selection using your cursor which will look like the first snapshot. Then type the desired characters to replace the text within the selected boundary.
Here in the example, the public keywords of the properties has been marked using the Box Selector and when typing, it is actually changing in all the lines. Have a look into the second snap where I am typing “internal” to replace “public” and that’s populating in all the lines where I marked.

Easy Navigation:
It is very easy now when you want to navigate to your specific code. As Visual Studio 2010 is built on top of WPF hence it has now proper filtering as and when you type. Press CTRL+, to open up the “Navigate To” dialog and this will show a list of matching criteria once you start typing in the “Search terms” field.
Better Toolbox Support:
Visual Studio now came up with better Toolbox support. You can now search Toolbox Item very easily. Just type the desired name of the Toolbox Item and the IDE will jump into the focus of matched element. Pressing TAB will bring the focus to the next matching element.
It has now a better feature in terms of Bookmarks. A team can now collaborate bookmarks between them by using the import/export bookmarks. You can now pin the debug value so that you can access it in later point of time, also you can now add a label to your bookmark.
Lets give a brief idea on this. Suppose, you are debugging your module & while debugging you found an issue in another’s module and want to let him know that there is a bug in his code and creating issues in your module. Just sending out an information requires debugging to the code again & finding out the issue by the another team member. Now in VS2010 IDE, you can now pin the debug value and export that bookmark with proper comments as an XML & send it out to your another team member. Once he imports it to his IDE, he can see the bookmark with the debug value available from the last session. From this point he can debug the root cause instead of finding out the area again. This is very useful in terms of collaborating debug information with the team.
The only thing that I don’t like here is, the XML which uses line number to store the breakpoint information. If the code has been modified in the other member side, it will not work correctly. The only requirements of the import/export to work correctly is “There should not be any modification in the shared code file”.

Visual Studio has now the feature called “IntelliTrace” by which you can trace each step of your debug points. This is very useful when it comes to a larger UI where you can find the calling thread information in the IntelliTrace Window.
There are more features like better TFS Support, in-built support for Cloud development, modeling, reports etc. which I have not explored till now. Once I explore those, will post it as a separate thread. So for now, go ahead and learn Visual Studio 2010 features and get familiar with it for productive development.

Fix for Visual Studio 2010 RC Intellisense Crash

Microsoft has released two hot fixes till now for Visual Studio 2010 RC crash related to intellisense. The people who are currently using Visual Studio 2010 RC in a machine having UI Automation 3.0 APIs, touch screen, screen reader etc. have to download & install the following two HotFixes:

Click here to get the first Fix for Visual Studio 2010 RC

Click here to get the second fix for Visual Studio 2010 RC

If you need any more information on the fixes then get it here at MSDN Blog.

C# 4.0 New Features – Named and Optional Parameters

In this post I will talk for one of the new feature in C# 4.0 – Named and Optional Parameter. Actually these are not a single feature but two different feature. You can get more benefit if you work with them together. So, what are those? Named parameter is a way to provide an parameter to the method using the name of the corresponding parameter instead of its position in the parameter list. Whereas, optional parameter allows you to omit arguments to member invocation.

Silverlight 5 Wish list – Please contribute yours

Hi folks, as all of you know that Silverlight 4 is now going to come out as “Go-Live” license within a few months and also in the mean time there are some wishlist coming for Silverlight 5, hence I am writing this post to collect those most wanted features requested by the community. Please contribute your wishlist for Silverlight 5 here (as comment) and I will update that list regularly.
  • Sophisticated Authentication & Security (includes client certificates as credentials for web service call) - [Vote] – alexander.biskop
  • More encryption algorithm - [Vote] – alexander.biskop
  • More flexible way to do localization in DataForm/DataGrid - [Vote] – sladapter
  • Application patching functionality - [Vote] – Haathen
  • Better Local Messaging API - [Vote] – ksleung
  • Better drawing API - [Vote] – ksleung
  • Support for Report Viewer - [Vote] - mlonny
  • Real time printing support - [Vote] – ksleung
  • Support for iPod/iPhone - [Vote] - microsoft_kc
  • Android support - [Vote] – ksleung
  • Better 3D support like WPF - [Vote] - microsoft_kc
  • An embedded database component like SQL-CE that can be used in OOB mode - [Vote] – Joeyw
  • Better support for WritableBitmap - [Vote] – Joeyw
  • Vector Printing - [Vote] – Joeyw
  • Support for IObservable for databinding - [Vote] – Joeyw
  • Rich Text Editor which allows Word Wrapping around images or other elements - [Vote] - Erwin Beckers
  • BMP and GIF image support - [Vote] - Erwin Beckers
  • More advanced controls like Outlook Agenda/Calendar control - [Vote] - Erwin Beckers
  • Transparency Support in Out-Of-Browser Mode - [Vote] - microsoft_kc
  • Improved SaveFileDialog with DefaultName option - [Vote] - Neha
  • ChildWindow with NON-modal support - [Vote] - Amantha
  • Flash video playback - [Vote] - Erwin Beckers
  • A working webbrowser control in a non-out-of-browser scenario - [Vote] - Peter Gfader
  • Support tooltip better for transparent, init delay, show delay, tiling image brush - [Vote] - Anonymous
Your suggestions for Silverlight 5 feature requests are welcome to publish here. Cheers…
Also, you can post them & vote in Silverlight Uservoice.

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