Building the eBay Simple Lister with Silverlight

Michael WolfPrinciple Architect WPF & Silverlight

Michael.Wolf@cynergysystems.com

It Takes a Team

“If you don’t have a triad of a designer, technologist, and business professional all coming to the table with equal skills and equal levels of creativity, the result will be a substandard product” – Bill Buxton 2010

• Jim Donaghy: Technical Lead• Jon Bradley: User Experience Designer• Casey Rayl / Michael Rumely: Developers

Sketching on a screen

• Think First sessions • Quick Ideation• Be ready and willing

to throw away• Deleting pixels is

always cheaper than deleting lines of code

Playing with sketches

Player Demos

2 minutes goal

• Original project goal was to list an item in 2 minutes.

• Achieved listing in 30 seconds through rapid ideation and a rich client based platform

Using Sketch flow forrapid ideation

• Demo

Organizing projects for designer developer workflow

• Designers Sandbox• Visual States• Project structure which shares a resources

assembly from sketchflow, to sandbox, to live app

Silverlight 4 Lessons learned

• Drag and Drop How to:

• Web cam security requests must be in the ui thread, but start/stop locks ui thread * no need for permission request on oob elevated

Silverlight 4 lessons learned 2

• Using xap signing shows trusted installer * more details to come from john papa

barcode lookup

• Silverlight 4 web cam capture and drag and drop used to capture images

• Barcode recognition : c# silverlight port of zxing http://code.google.com/p/zxing/

• I am working with the zxing team to submit port back

• Demo

Got Questions

• Questions? Need Answers?– Michael Wolf :

Michael.Wolf@cynergysystems.com @geekpunk

* We will be available in the commons after the session to continue the conversation