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Introducing PowerShell Pages - Script Style HTML Rendering

Early in the web development world, scripting languages such as ASP or PHP were used to compose pages. Although this proved great for relatively static pages, the dynamic web, filled with rich applications called for a more powerful framework. Thus, frameworks like ASP.NET were born. ASP.NET solved a...

Posted to Andre de Cavaignac (Weblog) by mrdecav on 07-05-2008
Gatsb.com Now Open Source (A Case Study in Geotagging, Workflow Foundation, SMS/MMS Parsing)

After hosting Gatsb.com for a year, I have decided to open source the project. I haven't had time to promote it the way I wanted to promote it, and it therefore hasn't caught on with too many users. I've been busy with other projects, other (grander) ideas, and think that this one should...

Posted to Andre de Cavaignac (Weblog) by mrdecav on 06-14-2008
Invoking PowerShell Scripts from An Application

If you want to run your PowerShell scripts from a piece of code you're writing, and would prefer not to use Process.Start , you can easily use the PowerShell runtime classes to run those scripts for you, completely in-process. The code snippit below shows how you can create a Runspace and pass it...

Posted to Andre de Cavaignac (Weblog) by mrdecav on 05-01-2008
Solution: "Unknown error", LDAP connection strings and System.DirectoryServices

If you've been using System.DirectoryServices . DirectoryEntry class, or the newer System.DirectoryServices.AccountManagement namespace to access your LDAP or Active Directory server, you may have experienced the following error: COMException: "Unknown error (0x80005000)" This can happen...

Posted to Andre de Cavaignac (Weblog) by mrdecav on 05-01-2008
Cluster Primitives: MPI, MPI.NET, Large Data, and Passing Classes

The Message Passing Interface (MPI) standard , and its .NET implementation, MPI.NET have been some of the cornerstones of development on compute clusters. The standard supplies a simple yet primitive way of both sending and receiving data between running compute processes. The large advantage of MPI...

Posted to Andre de Cavaignac (Weblog) by mrdecav on 04-27-2008
WPF Compute Cluster Monitor Demo - Using 3D, Transparency and Styles

Here's a cool demo that Ronald Lintag and I threw together for Lab49. The application is supposed to demo a basic GUI that shows the status of nodes and jobs on a compute cluster. We're showing off the use of WPF 3D and styles to create a cool looking console for a sys-admin. You can imagine...

Posted to Andre de Cavaignac (Weblog) by mrdecav on 02-19-2008
Distributed/Grid Computing with Silverlight

Daniel Vaughan has a very cool project up on CodeProject.com. He's built an awesome grid computing "platform" using Silverlight for his compute nodes. Think SETI@Home style. CodeProject article: http://www.codeproject.com/KB/silverlight/GridComputing.aspx Online Demo: http://www.orpius...

Posted to Andre de Cavaignac (Weblog) by mrdecav on 12-26-2007
Windows Compute Cluster (HPC) Basics: Running Map/Reduce Models on CCS 2003

After not writing anything about HPC or Windows Compute Cluster for a while, I figured its about time I write *something* about it because I've been working with it so much recently! Download the Sample Project (Visual Studio 2008, Beta 2) Windows Compute Cluster Server 2003 is Microsoft's relatively...

Posted to Andre de Cavaignac (Weblog) by mrdecav on 12-26-2007
WTF: "Problems" with Anonymous Delegates, LINQ, Lambdas within "foreach" or "for" Loops

Sample code available here that exemplifies this bug (requires Visual Studio 2008 Beta 2 and SQL Server). So here is an incredibly unintuitive problem I ran into with anonymous delegates (same will happen for lambda expressions ) in C# while using them inside loops . This will also happen in a few other...

Posted to Andre de Cavaignac (Weblog) by mrdecav on 11-18-2007
Tricky Generics: "New" Keyword and Generics

Trying to decide how to write some unit test helper classes, I ran into an interesting question. What happens when you use the new keyword along with .NET generics? The example below shows my dilemma: 1: [TestMethod] 2: public void DoBase() 3: { 4: DoT<Base>( new Base()); 5: } 6: 7: [TestMethod...

Posted to Andre de Cavaignac (Weblog) by mrdecav on 11-16-2007

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