Once in a life time you get the chance to hire a Luminary

Industry #Luminary & #Silverlight #MVP is looking for his next role, the race is on, if u'd like to have a rock star @ your company see @WynApse author of Silverlight Cream. see http://geekswithblogs.net/TehGrumpyCoder/archive/2010/09/01/day-1-of-being-unemployed.aspx

Hiring an MVP like David Campbell is just an almost unbelievable oppertunity for a company to gain enourmous creditbiltiy as wellas a huge strategic asset. Having heard that David (not me, but Mr. Campbell) I almost chocked. I would give my eye teeth to hire some one of his calibur and there is such low chance of ever being able to hire some one like him. In any case it will be interesting to see what company gets him first :)

some more about David Campbell:

http://www.silverlightcream.com/

http://wsinsiders.com/the-silverlight-mvp/

http://geekswithblogs.net/TehGrumpyCoder/archive/2010/09/01/day-1-of-being-unemployed.aspx

http://www.wynapse.com/

http://twitter.com/WynApse/

Hacking the Xap for Business Intelligence (BI)

I did a post a while ago on 'Hacking Xap' files primarily around dynamical loading resources. The past few months I have been playing with another even cooler way to 'hack' xap files. In this case its about business and taking a precompiled xap file and instrumenting that xap file without recompiling your application or any code changes to the application. This kind of detailed usage information can be extremely helpful in looking at how applications are used and help identify key areas to focus on. From a hack standpoint to take a precompiled xap and put 'code' into all the method calls dynamically is just cool. Granted that collected information just doesn't show up on your desktop, you have to build a web service to collect the data but just the fact that I can take a precompiled xap and get it wired up without any jumping around is just cool.

so lets get to the meat of my experience...

I meet with a guy at PDC09 at well PDC from Preemptive Solutions http://www.preemptive.com/ and he brought up a tool that they have that is part of their 'dotfuscator' product. Most .net developers have either heard of 'dotfuscator' or seen it since its part of visual studio. But part of their main 'dotfuscator' tool is around 'Business Intelligence' and a little known additional feature that in my mind should be the main focus is my main interest and the subject of this post. In any case I got excited about this xap hacking tool er 'Business Intelligence tool' and he got myself a license.

So I got my license and found that getting it working is/was very problematic, not only a license key but an activation key and a bi key etc. I had to get a hold of tech support basically twice with an ongoing thread with their tech support... to be honest I'm no longer a fan of DRM or any other security system that prevents apps from running when installed or secures files. I understand that this is needed to keep software from being pirated and intellectual property stolen but preemptive got way overly excited with their implementation.

Install experience and setup aside it all seems pretty straight forward. The hard part of using the software is building the wcf service and collecting the data. Once you get a service up and running though you basically just need to load your xap and pick where you want to collect data in your app and point it at the web service. The fact that you don't need to re-compile your xap is just awesome. And from a ux standpoint getting this data really gives you insight into your application that you just couldn't get without writing alot of code up front.

If BI around usage of your application is important to you in building better Silverlight apps then this tool is worth the hassle of getting it setup. As a Silverlight 'guy' I would list this as a critical tool in your tool Silverlight toolbox.

So to be fair to the company they provide an endpoint that users can use and I'm told there is a codeplex project for helping you build an in house solution and put the results on a sharepoint web part. My only issue with that is having another company have my usage data which or course would be crazy. Certainly I would not want anyone having my data as I have virtually no trust in other companies and their network security... but alas others might be ok with that. and using sharepoint... well just say no ;) Sharepoint provides a great solution if you don't want to customize it too much... :)

Silverlight Hosting in WPF

Ok so we know this has been done. Yawn, and it can be done any number of ways from hacking it in a browser control but actually doing it in WPF without the browser control can be a huge pain. Here is a little trick that helps you do just that without all the jumping around.

Jeremiah, (this programmer extraordinaire with apparently WAY to much time on his hands) wrote this little codeplex project that is a 'WPF Panel' that hosts Silverlight. http://silverlightviewport.codeplex.com/

pretty slick, if you dive into the code it is kind of complicated but to use it is straight forward enough. If you download the project and run it you can see it in his test application running a xap in Window1.xaml.

<slvp:SilverlightViewportElement BaseUrl="http://silverlight.net/"
Source="http://silverlight.net/clientBin/showcasenav/ShowcaseNav.xap"
ViewportSize="550,550"
RenderFps="40"
x:Name="slViewport">
<slvp:SilverlightViewportElement.Effect>
<DropShadowEffect BlurRadius="50" />
</slvp:SilverlightViewportElement.Effect>
<slvp:SilverlightViewportElement.LayoutTransform>
<RotateTransform Angle="10" />
</slvp:SilverlightViewportElement.LayoutTransform>
</slvp:SilverlightViewportElement>

you'll notice this is all the standard WPF fare but lets look at the properties on the main panel itself. First is our base url that tells the control the domain in which the xap or silverlight application lives. Next we have the 'Source' which points to our xap file. We then set a view port size as 'ViewportSize' and then the last one we will mention is 'RenderFps' which is the 'speed' that the Silverlight is 'rendered' into your panel. In effect your app now runs in the WPF app. Nice and clean as long as you don't look at the source for the panel which is more a work of art... :)

Hacking the Silverlight Xap file

Every now and then I find I need to pull resources out of a Xap file. One of the issues with this is knowing what’s in the XAP. There have been a number of solutions I’ve used over the years (ok that is like 2.5 ish years) like having an index file either a Csv or Xml etc. A few weeks ago I ran across this little class that some guys were talking about on the Silverlight Insiders/MVP thread called un-zipper found here:

http://www.sharpgis.net/post/2009/04/21/REALLY-small-unzip-utility-for-Silverlight.aspx

What is cool about this class is it makes getting the assets out of a zap even if you don’t know what is in the xap up front easy and straight forward. From a using standpoint you basically need to create a webclient and a call and use the Unzipper to run through the contents. The Unzipper class deals with mucking up what is in the xap so all you need to-do is run through the collection and pull out what you need… Let us take a look at what you need to-do:
Assuming you have the Unzipper class (download here) you need the following libraries:

using System.Collections.ObjectModel;
using System.Net;
using System.Windows.Controls;

From here we need to create a web client

WebClient wc = new WebClient();
wc.OpenReadCompleted += new OpenReadCompletedEventHandler(wc_OpenReadCompleted);
wc.OpenReadAsync(new Uri("HackingXaps.xap", UriKind.RelativeOrAbsolute));


In this code we create the WebClient, add a handler and run the call pointed at our xap we want to load.

void wc_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
{
if (e.Error == null)
{
UnZipper unzip = new UnZipper(e.Result);

foreach (string filename in unzip.GetFileNamesInZip())
{
//do something with the file name…?
}
}
}

From here you can pretty much do whatever you want. Look to see this in the up coming version of the HackingSilverlight library.