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In this third WP7 programming tip, Jeff Prosise demonstrates how to disable an application bar button in code.

Source: Jeff Prosise's Blog

Application bars play an important role in the UI of many phone applications. An application bar can contain up to four buttons (and five menu items) giving the user quick and easy access to the app’s most commonly used features.

Each button is an instance of ApplicationBarIconButton, and the ApplicationBarIconButton class exposes a property named IsEnabled that allows buttons to be enabled and disabled.

See more Windows Phone programming tips by Jeff:

• Silverlight for Windows Phone Programming Tip #1
• Silverlight for Windows Phone Programming Tip #2

Loek van den Ouweland has a video on the Image Button in WP7.

Source: Loek van den Ouweland's Blog

Silverlight for Windows Phone 7 has no Image Button control. Of course you can subclass an Image or create a UserControl, but it is much easier through the great Silverlight Styling & Templating. In this video I’ll show you how it’s done.

Michael Washington demonstrates how to create animated button press in Windows Phone 7.

Source: Open Light Group

Perhaps it would have been simpler if I just used a button, but I already created my WP7 app with a list that contained non buttons. However, when you select an item it doesn’t move at all. This didn’t quite feel right. The fix turned out to be really simple.

In Part 5 of this series, Mike Taulty demonstrates how he added quick select buttons to his PDC 2010 Silverlight app.

Source: Mike Taulty's Blog

Following on from the previous post I wanted to add some simple buttons so that when a user is looking at a list of sessions they can quickly click and select that they want to download all the available PowerPoints or all the available hi-def videos or whatever it might be.

Here you can find the previous posts from this series:

Part 1 | Part 2 | Part 3 | Part 4

Source: Peter Brady's Blog

Text rendering has always been Silverlight's dirty little secret. For every major release I hope that maybe this time fonts won't look terrible. Unfortunately as of 4.0, there are still a lot of improvements that must be made before Silverlight text will match the quality and readability of Flash. Robby Ingebretsen gives some helpful tips that can improve smoothness in Silverlight 4. But one of Silverlight's most basic controls continues to look terrible.

Source: Jesse Liberty's Blog

Create a drop-down button. Your button will have a part to click (with text saying what it will do) and an arrow next to it to drop down a list of alternative actions to take when the button is pressed. Changing the action and then clicking the button changes what happens when the button is pressed. You do not need to actually take the action, just indicate that you have differentiated which action was intended.

I've previously written that one of my ContextMenu test cases for the April '10 release of the Silverlight Toolkit was to implement a quick "split button" control for Silverlight using Button and ContextMenu. Though it wasn't my goal to build a general-purpose control for widespread use, there's been a lot of interest in SplitButton/MenuButton and I followed up with a few fixes for the Silverlight version and "official" support for WPF.

These buttons have gone through many iterations and I’m still not sure I’m quite happy with them just yet, but I’ll cover them anyway since they introduce a few interesting attached properties.

Hardware requirements for Windows Phone 7 Part 1 – Buttons, Screen, Cameras, Keyboards, Wireless, Bluetooth, CPU