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1. Import System.Windows.Interactivity.dll.

2. Add a reference to the .dll in the download.

3. Drag the behavior from the asset panel onto a ChildWindow.

4. Set a fixed width and height to the ChildWindow. Set width and height of the Layoutroot to Auto.

Some pretty strange bug in amCharts has been reported to me. In one scenario user got 3 graph lines when zooming-in deeply on a single line graph.

While investigating this bug I found out that previous data point in that scenario was far apart from the one in view and a line was drawn from that previous data point to the current one. The calculated X-coordinate of the previous data point was something around –89000 in my test case so I became curious if this a little crazy coordinate value could be the source of the problem.

Recently I had a developer ask me how he could fire an event from the CheckBox that I had put in the Style of the UserControl I gave him. 

I thought about it and, the problem is that objects in a Style are not really part of the Visual Tree until the Style is attached at runtime. 

In pretty much any graphics system, transforms constitute the most important feature that doesn’t actually draw anything. Instead, transforms alter the appearance of visual objects by modifying coordinates with mathematical formulas generally expressed as a matrix multiplication.

In the comments of my Silverlight unemployment visualization, someone asked about where I got the US outline. I got it from theWikiCommons website which has an SVG (scalable vector graphics) version that I pulled into Adobe Illustrator and then exported as a XAML file using Mike Swanson’s Illustrator-to-XAML plugin. I realized this might not be possible for many people who don’t own Adobe Illustrator, so I did it myself for several files that are now available for download as XAML vector graphics maps of the US.

We’ll cover navigation, layout, and sample data—all without writing a line of code! Pay attention because there’s a quiz at the end to test what you’ve learned!

Q: In Silverlight I want to display a list of complex bound criteria, which includes data, child data and photos for each item. The requirement is for the list to be displayed horizontally with only one item displayed at a time. Is this possible?

A: There are at least two approaches to solving this: a ListBox and a DataForm. In Silverlight 3, I wasn't able to scroll the ListBox incrementally, resulting in partially displayed items. In some cases this might be desirable, but the DataForm offers a clean incremental scroll. Figure 1 shows the DataForm solution. Both approaches use a DataTemplate that allows reuse of control layouts.

This example is the result on making heavy experimental use of effects on a Textblock element. It has a visual appearance that reminds me of Jugendstil (Art Nouveau). Therefore I called it "Digital Jugendstil".

This prefix provides a common URI-based XAML namespace that ALL of the most commonly used client SDK controls can share.

Let's have a look at how this worked before, in Silverlight 3 (and in the Silverlight 4 beta, for that matter).