Tuesday, September 30, 2008

make sure you manually stop storyboards on hidden objects

storyboards continue to run even if the object you’re animating is invisible, so you’re generally burning CPU cycles for nothing. in silverlight, you can stop any storyboard just by calling Stop:


in WPF, you need to specifically let the runtime know that you want Stop functionality when you call Begin via the isControllable paramater:

myStoryboard.Begin(this, true);

Saturday, September 13, 2008

properties vs. functions

although there’s little difference after compilation, treat properties and functions very different from a logical perspective. properties should almost always be deterministic, i.e. calling the same property twice should return the same value (so object.Property == object.Property must be true). a property can have a lazy get constructor, so it actually does some work the first time it is called, but it must remember the result of that work and return it on subsequent calls. so in general a property returns something stateful or something static.

in all other cases, use a function, and give it a meaningful name based on what it’s doing (i.e. GetRandomNumber(), CreateUser(), etc.).