November 23, 2011

Top 10 blogs from Diego Rodriguez

Diego Rodriguez is a partner at the design and innovation firm IDEO. He is also a professor at Stanford's, where he teaches classes about business design and entrepreneurship. His blog metacool has a passionate following among people who spend their lives trying to make a dent in the universe.

October 15, 2011

Disabled list items with enabled scrollbars

In several scenarios we disables list box preventing user to do any action against list items. When you disable list box it also disables scrollbars preventing scrolling of list items. However in some cases we might want to show scrollable disabled items to view list contents. To solve this issue there are various options available including implementation of custom list box with properties to enable scrolls. Following code snippet shows a technique to disable only list items allowing user to scroll items. Note the ScrollViewer and ItemsPresenter properties in list box control template which governs enabling scrollbars while disabling list items.


<Window x:Class="WpfTest.Window2"        xmlns=""
Title="Window8" Height="300" Width="300">
<ListBox  Margin="10,10,10,10" Height="130" Width="100">
<Style TargetType="ListBox"  >
<Setter Property="Template">
<ControlTemplate TargetType="ListBox">
<Border BorderBrush="Black" BorderThickness="1">
<ScrollViewer IsEnabled="True" >
<ItemsPresenter IsEnabled="False"
SnapsToDevicePixels="{TemplateBinding UIElement.SnapsToDevicePixels}"/>
<ListBoxItem>Item 1</ListBoxItem>
<ListBoxItem>Item 2</ListBoxItem>
<ListBoxItem>Item 3</ListBoxItem>
<ListBoxItem>Item 4</ListBoxItem>
<ListBoxItem>Item 5</ListBoxItem>
<ListBoxItem>Item 6</ListBoxItem>    
<ListBoxItem>Item 7 - Long length item</ListBoxItem>
<ListBoxItem>Item 8</ListBoxItem>
<ListBoxItem>Item 9</ListBoxItem>

October 05, 2011

What is WCF Web API?

Applications are continually evolving to expose their functionality over the web for example social services like Flickr, Twitter and Facebook. Aside from social applications, organizations are also looking to surface their core enterprise business functionality to an ever expanding array of client platforms. WCF Web API allows developers to expose their applications, data and services to the web directly over HTTP. This allows developers to fully harness the richness of the HTTP as an application layer protocol. Applications can communicate with a very broad set of clients whether they be browsers, mobile devices, desktop applications or other backend services. They can also take advantage of the caching and proxy infrastructure of the web through providing proper control and entity headers. We are designing specifically to support applications built with a RESTful architecture style though it does not force developers to use REST. The benefits of REST for your applications include discoverability, evolvability and scalability.

September 17, 2011

A Comparison between Enterprise-Architecture Methodologies

Roger Sessions explains comparisons between top 4 architecture methodologies in this article.
None of the methodologies fulfills the enterprise architecture however they can be viewed as -
  • The Zachman Framework for Enterprise Architectures—Although self-described as a framework, is actually more accurately defined as a taxonomy
  • The Open Group Architectural Framework (TOGAF)—Although called a framework, is actually more accurately defined as a process
  • The Federal Enterprise Architecture—Can be viewed as either an implemented enterprise architecture or a proscriptive methodology for creating an enterprise architecture
  • The Gartner Methodology—Can be best described as an enterprise architectural practice
Following table shows ratings for these four methodologies -
  • 1: Does a very poor job in this area
  • 2: Does an inadequate job in this area
  • 3: Does an acceptable job in this area
  • 4: Does a very good job in this area