I am presenting at SoCalCodeCamp this weekend (January 30th, 2010) – Advanced WPF – Using Model-View-ViewModel in WPF Applications. Agenda : 1. Roles of the M-V-VM triad 2. Why use M-V-VM ? 3. Characteristics of the ViewModel 4. Build a Sample WPF Application using M-V-VM Resources : MSDN Magazine Article and Sample Application Download Martin Fowler’s description of the ‘Presentation Model ‘ Jeremy Miller’s ‘Build Your Own CAB’ series
I am not just being philosophical here. In WPF, ControlTemplates allow you to transform a control’s appearance. This is not the same as applying stylesheets. This is an entirely new level of customization. What you see in the screenshot below looks like a Dial but is actually a simple ProgressBar control wearing a “Dial” template. The Dial template was created using Microsoft Expression Blend . Include the ControlTemplate as a Window.Resource and then assign it to ProgressBar element’s Template attribute : Of course that is not all. The ControlTemplate must define some named elements of FrameworkElement type. Charles Petzold has explained it in detail : MSDN Magazine Article. So, I will not repeat it here. The sample code can be […]
This exercise in binding a WPF ListView control with LINQ to SQL was a lot of fun ! The following image shows data from AdventureWorks sample database displayed in the ListView control. The end result is very admirable, even in this very basic demo. Feeling a complete sense of freedom is unavoidable when working with WPF. This sample demonstrates : LINQ to SQL mapping. WPF ListView Control DataBinding. Displaying images stored in database as varbinary in WPF control. The sample code can be downloaded here : WPF-LINQ to SQL Sample License : Creative Commons Attribution-Noncommercial-Share Alike 3.0 United States License.
It is essential to treat database schema as source code and apply all the norms and best practices applicable to it. From what I hear and read, database schema version control is non-existent in too many projects. Various techniques to accomplish version control of database schemas have been discussed and published. Martin Fowler and Pramod Sadagale has written a comprehensive article on Evolutionary Database Design. It is a must-read for everyone involved with database development. K. Scott Allen writes in detail about an excellent system here – Versioning Databases – Change Scripts. This approach is sufficiently light-weight (for my taste) and provides complete control over the whole process. I am providing a free tool here that you can use to […]