The Visual Basic Team : Kevin Halverson

Happy 10th Birthday to the Italian VB Tips and Tricks Community! (Lisa Feigenbaum)

VBTeam — Mon, 08 Dec 2008 19:00:00 GMT

"Visual Basic Tips & Tricks" is an Italian online community that was started 10 years ago today. To be exact, the first tips were actually published in 1996 on a personal web page of the founder and leader, Gianluca Cannalire. However, the group recognizes the first day of the "real community" as December 8th 1998, when a web portal was created with articles, forums, mailing lists, downloads, and tips. "Visual Basic Tips & Tricks" currently hosts 36,300 subscribers, and is the second largest Italian development community!

Visit it here: http://community.visual-basic.it/

The Microsoft Visual Basic team would like to thank all the people in the "VB T&T" community that share their knowledge, experiences and real life scenarios on the site every day, and congratulate them on their 10 years. In honor of this special event, we've created a fun video for you to enjoy. :)

Video: http://www.visual-basic.it/happybirthday_wmv.asp

In this video: Karen Liu (Lead IDE Program Manager), Kevin Halverson (VB Compiler Test Team), Lucian Wischik (VB Specification Lead), Lisa Feigenbaum (VB Community Program Manager). Thanks to Lucian for baking the cake and leading us in Italian, and to Kathleen McGrath (Visual Studio Content Architect) as well who produced the video.

How to implement IQueryable (by Kevin Halverson)

VBTeam — Thu, 12 Jul 2007 01:15:00 GMT

Here’s a link to a post I just finished on ‘How to implement IQueryable’ (create a custom Linq provider).

http://blogs.msdn.com/kevin_halverson/archive/2007/07/10/how-to-implement-iqueryable.aspx

My example project allows you to query the Windows Vista (Desktop) Search engine for files on your local machine. For example:

Dim index As New WDSQueryObject

Dim cutoffDate = #6/28/2007#

Dim r = From file In index _

Where file.CreationTime > cutoffDate And _

file.Name Like "%.exe" _

Select file.FullName, file.CreationTime

LINQ Cookbook, Recipe 4: Find all complex types in a given assembly (Kit George)

VBTeam — Thu, 28 Jun 2007 04:30:00 GMT

Ingredients:

- Visual Studio 2008 (Beta2 or Higher)

- An assembly which you want to analyze (in this example, we use mscorlib.dll, the assembly which houses String)

- A definition for 'Complex Type'. In this instance, a complex type is defined as having more than 10 public methods, of which at least one has more than 3 arguments

Categories: LINQ-To-Objects, LINQ and types, LINQ and WinForms

Instructions:

- Open Visual Studio 2008, and Click ‘File/New Project’. Find and double-click the ‘Windows Forms Application’ Icon

- Drag and drop a Listbox to the form. Size the listbox to be fairly tall. Drag and drop a button to the form

- Double-click the button, and add the following code to the button:

Dim q = From type In System.Reflection.Assembly.GetAssembly( _

GetType(String)).GetTypes(), _

m In type.GetMethods() _

Where type.IsPublic _

AndAlso type.GetMethods.Length > 10 _

AndAlso m.GetParameters.Length > 3 _

Select type Distinct

ListBox1.Items.AddRange(q.ToArray)