Just got VS2008 Beta 2 Installed so now it's time for some LINQ to XML action.
These are the top 3 places you should go to get started:
1) MSDN Linq Project: http://msdn2.microsoft.com/en-us/netframework/aa904594.aspx
2) MyVBProf: http://www.myvbprof.com/2007_Version/VB9_XML.aspx
3) Scott Guthrie's Blog: http://weblogs.asp.net/scottgu/archive/2007/08/07/using-linq-to-xml-and-how-to-build-a-custom-rss-feed-reader-with-it.aspx
I don't think I could have gotten started without the MyVBProf tutorial so I highly recommend that one. The most importing thing that helped me very quickly was to import to XML schema. Here's the MSDN item that describes how to enable this intellisense: http://msdn2.microsoft.com/en-us/library/bb531325(VS.90).aspx.
Once you got that Intellisense, writing Linq queries starts to be fun.
From the XML above I wanted to get a list of activitites. For each of the activities, I wanted:
As you can tell, the Intellisense really helps creating quickly some nicely readable queries. .Take and .Skip also made my life easier and then of course there's the anonymous types (ID = ..., StartTime =...) which also make VB coding more dynamic than ever :-)
Now I got this little sample going, I can start some real work. These are some tasks I have in mind:
- Creating a seperate XML file with just the top level information about the rides
- Creating a file with a representative collection of points per track. Feeding thousands of points to a Virtual Earth Map doesn't make any sense
- Creating some routines to clean up the data. Sometimes the device records some abnormal data I need to filter out. Also, I want to for instance see the average speed with and without breaks.
After that, I can start writing some UI. That will be interesting too. In the meantime I'll try to post on some of the Linq work I'll be doing.
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