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Karl On WPF - .Net

The Home of Mole and Karl's BLOG on WPF & VB.NET. (Karl speaks VB, learning C#)

Won 3rd Prize at www.community-credit.comJanuary 1

I was notified this morning by David Silverlight of www.community-credit.com that I had won 3rd prize for logging my community work for December 2008.

This time I won The Lego Calendar.  How cool is this!  All prizes award this and every month can be viewed here.  Trust me, David awards only the super geek stuff.

Supplied in three blocks displaying day, month and year which can, thanks to their Lego brick type design be assembled at will, each yellow, white and red block measures in at 80mm square with the click over display being changeable with a simple depression of each of the blocks.

 

I joined Community Credit on 21 Dec 2007.  It is a super web site where developers can log their contributions to the world of computing and developing.  You don’t log work related items, just things you do outside of work and then give or expose to world, usually over the Internet in the form of articles, tutorials, code examples, presentations, attending community groups and code camp.

This is an international site.  So yo

Exploring a Model-View-ViewModel Application; WPF Password Manager, Cipher TextDecember 29 2008

I have posted an article on Code Project, Exploring a Model-View-ViewModel Application; WPF Password Manager, Cipher Text which explores some MVVM scenarios in the Cipher Text application presented in the article.

Cipher Text Application Features

• Data stored in encrypted file
• Flexible password generator
• Instant full text search feature
• Nine pre-established data entry forms (can be modified at run-time)
• Run-time modification of a record’s shape and field behavior (add, change and remove fields)
• Run-time configurable case correction rules
• Dynamic and rich field validation based on assigned field behavior
• Single click copy of any data to the clipboard
• Nice WPF UI
• “How To” usage video for getting the most of Cipher Text
• Single file XCOPY deployment

MVVM Scenarios Covered

• List of Commands Scenario
• Showing and Hiding Views and Focus Setting Scenario
• Data Driven Dynamic Form Scenario

I hope you like and can learn more about WPF  and MVVM from this article and sample code.

Have a great day!

Just a grain of sand on the worlds beaches.

Posted in Data Binding, M-V-VM, MVVM, VB.NET, WPF General      

WPF Toolkit DatePicker Memory Leak ProblemDecember 16 2008

Back on 8 December 2008 I had blogged about memory leaks and that I narrowed the leak down to a control. 

The WPF Toolkit DatePicker control has a dependency on the WPF Toolkit VisualStateManager.  The VisualStateManager has a memory leak that gets surfaced when using the DatePicker control.

Microsoft does not recommend shipping the DatePicker control to customers.

The Microsoft public announcement can be read here in this CodePlex VSM/DatePicker Known Issue post.

Hope you have a great day!

Just a grain of sand on the worlds beaches.

Posted in Bugs, WPF General      

WPF M-V-VM Series BeginsDecember 11 2008

Sorry it has taken so long to being posting to this series, but trust me the wait will be worth it.

I would like to thank Jaime Rodriguez and Josh Smith for working together with me and you’ll be seeing more information begin to flow from them.

I have set up a WPF & Silverlight Line of Business UI Design Pattern Home Page that will contain all articles, references and links to M-V-VM on my blog.

I have added my first article to the home page entitled, “Input Validation - UI Exceptions & Model Validation Errors.”  There is a link towards the bottom of the M-V-VM Home Page.

Please read the very short Home Page first so that you’ll fully understand the series content and direction.

This first article is out of order, normally a blogger would do the big introduction article first, but since this has taken longer than I wanted, I’m providing some meat up front and will go back and write the M-V-VM Introduction soon.

Also, look for a new version of XAML Power Toys, Code Name: M-V-VM that will assist in creating M-V-VM Views and ViewModels.

Hope you have a great day!

Just a grain of sand on the worlds beaches.

Posted in Commands, Data Binding, M-V-VM, MVVM, WPF General      

MVVM UpdateDecember 8 2008

I know that many developers are waiting of me to post the MVVM code.  I have spent the last three weekends tracing memory leaks that I thought were in my libraries.  I just didn’t want to post code that I knew had a memory leak.  I finally tracked the problem down today to a control.  For now, I have removed that control from my projects.  I will do a blog post on the control as soon as the control vendor has validated my findings from today. 

I will post the WPF LOB MVVM code and article on Monday, 8 December 2008.  The MVVM applications are all ready, I just need to write the article and make a few videos.  The main application I’ll post tomorrow has the Unit Tests to run the application without the UI.

This three weekends of lost time has set my delivery of Ocean back too.  I hope to post Ocean by the 18th or 19th of December.  The documentation will take the most time.

Here are some things happening in the MVVM spaces for WPF LOB developers that I know about:

• Jaime Rodriguez, possibly Josh Smith, possibly Beth Massi and myself will be doing an all day teaching event on WPF LOB MVVM in Los Altos near the end of January 2009.  As soon as registration opens I’ll post a message here.
• Adam Kinney and I will be recording another