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The Data Grid that is built-into LightSwitch is quite advanced. You will not really appreciate it until you attempt to duplicate its functionality manually. However, you may be faced with situations that require you to implement a Data Grid from scratch. This will allow you maximum flexibility in your application…
Hierarchical data is usually used to display data in a tree. The data typically is in a single table that is self-referencing, meaning it has one property that points to other records in the same table. This is how it is able to track the parent-child relationship between records. A Tree Control is usually used to visualize hierarchical data.
Karol Zadora-Przylecki (Microsoft) created an example, and included important code required by LightSwitch when using a Silverlight Tree Control. You can see the original post here: http://social.msdn.microsoft.com/Forums/en-US/lsextensibility/thread/bcdaa86f-459a-47d3-853a-3c5e56eb088a. In this article, we will follow the concepts outlined by that post.
Note: If you are new to LightSwitch, it is suggested that you start here: Online Ordering System (An End-To-End LightSwitch Example)