Fredde

Announcement and discovery in WCF 4

 .NET, C#, Visual Studio, WCF  4 Responses »
May 162010
 

WCF 4 comes with a bunch of new features where I find the service announcement and service discovery really cool. In this article I will implement a couple of services using these new features.

A couple of key words and classes for the scenario are SeviceDiscoveryBehavior, UdpAnnouncemenEndpoint, AnnouncementService. I will describe those classes along the way, but on MSDN you can find more information here: WCF Discovery Overview.

In my previous article I linked to a great article written by Aaron Skonnard, don’t miss it: A Developer’s Introduction to Windows Communication Foundation 4. It covers most of the new features in WCF 4, the simplified configuration, Workflow Services and a bunch of other stuff.

I will describe the scenario below along with a couple of code snippets.

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 Posted by Fredde at 15:30  Tagged with: , , , ,

Sharing DataContracts between WCF Services

 .NET, C#, WCF  13 Responses »
May 022010
 

In a previous article, Multiple web service references sharing types, I wrote about sharing types between referenced web services. That article used the old ASP.NET Web Service technique, but nowadays WCF is the technology to use. In this article I will use much the same scenario as in the previous article, Visual Studio 2010 and of course WCF (.NET 4).

I will describe the scenario below, describe what may be an upcoming problem and what can be done to avoid it. Please read the previous article as well, it is much the same solution that is to be presented here.

If you are not familiar with WCF and DataContracts you can read David Chappell’s article here: Introducing Windows Communication Foundation in .NET Framework 4. Aaron Skonnard has written a great article about WCF 4, read it here: A Developer’s Introduction to Windows Communication Foundation 4.

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 Posted by Fredde at 17:21  Tagged with: , , , ,

The importance of the order of routes in ASP.NET MVC

 .NET, ASP.NET MVC Framework, C#, Tips & tricks  6 Responses »
Dec 092009
 

mvc-logo-landing-pageLast week I had the pleasure of listening to a presentation from Scott Guthrie here in Stockholm, http://weblogs.asp.net/scottgu/archive/2009/12/06/my-presentations-in-europe-december-2009.aspx. One of the most interesting parts of the all day event was his talk about ASP.NET MVC 2. Yesterday I had some time off and started to try things out using Visual Studio 2010 Beta 2 and the ASP.NET MVC 2 template. It was running smoothly for a while until I bumped into a problem I recognized from earlier. I didn’t remember the solution right away, but soon I figured it out what was the key point in making the routes, registered in Global.asax, work properly.

The order when adding the routes using the MapRoute method on a RouteCollection object is important to avoid getting a 404 page when browsing to pages that are supposed to work. I will present the problem and the solution for it below.

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 Posted by Fredde at 13:49  Tagged with: , , , ,

Update Views through events between their ViewModels

 .NET, C#, MVVM, Patterns, WPF  2 Responses »
Dec 042009
 

eventLately I’ve been developing standalone WPF applications using Visual Basic. To make a WPF application somewhat easy to maintain and extend it is extremely important to use some design pattern. The most popular design pattern around when developing WPF applications is the MVVM pattern (Model-View-ViewModel).

Developing a single view application is really really straight forward using the MVVM pattern, but when it comes to multiple views application there is no simple solution to update one or more views from another view and still make the Views and ViewModels behind them loosely coupled. When I say update I mean making some property change in the ViewModels behind the Views to be affected by the change of something in another View or ViewModel.

In this post I will show how I’ve solved the problem using events and delegates. Before I describe my solution, please read about the basics in the MVVM design pattern. There are a lot of good publications around, e.g. THE MODEL-VIEW-VIEWMODEL (MVVM) DESIGN PATTERN FOR WPF and Model View ViewModel (Wikipedia).

To make it easier to understand this post and to make it easier for me to write it, please read the following article if you’re not familiar with WPF data binding and the usage of INotifyPropertyChanged: http://coredotnet.blogspot.com/2006/05/wpf-data-binding-tutorial.html.

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 Posted by Fredde at 09:11  Tagged with: , , , ,

Cloud computing/Windows Azure platform

 Cloud computing, Reading, Windows Azure  No Responses »
Nov 162009
 

cloudThe last couple of days I’ve been reading about cloud computing, mostly Windows Azure. Microsoft says that the Windows Azure Platform it is the following:

  1. An operating system as a service (Windows Azure)
  2. A fully relational database in the cloud (SQL Azure)
  3. Cosumable web based services with security and access control (.NET Services)

Currently the services are free, they are released in CTP. On February 1st next year Microsoft will start charging customers for using the platform.

Anyway, the last couple of days I’ve been reading about this platform, four very good white papers written by David Chapell (http://www.davidchappell.com):

  • Introducing the Windows Azure Platform: An Early Look at Windows Azure, SQL Azure, and .NET Services
  • Introducing Windows Azure
  • Windows Azure And ISVs: A Guide for Decision Makers
  • A Short Introduction to Cloud Platforms

You can find them at http://www.davidchappell.com/writing/white_papers.php, and you won’t be disappointed!

 Posted by Fredde at 08:57

The cause of the silence

 Uncategorized  4 Responses »
Sep 202009
 

silence_thumbA couple of weeks ago I moved to Stockholm, I quit my old job and started working at a new place. Just before the new job began I started to write about WPF and the MVVM (Model-View-ViewModel) design pattern but I never finished that article. I will not finish it either, because of the simple fact that there are loads and loads of articles around, describing these subjects much better than I managed to do.

Please note that I haven’t quit writing just because of the silence around here lately. I will still write about programming, mostly .NET Framework, as before.

I have a new article being published in a couple of hours, I hope… This one is much smaller than the unfinished one mentioned above, so please check back in a little while and there will be a short article about WPF, MVVM and a problem concerning UserControls when using that design pattern.

 Posted by Fredde at 14:50

freddes.se is relocated

 Uncategorized  No Responses »
Jul 092009
 

Last night the site move was completed. There will for sure be some configuration left to modify, but the site is up and running again.

 Posted by Fredde at 08:46

freddes.se is moving

 Uncategorized  No Responses »
Jul 062009
 

snail1As some of you may have noticed the activity around here has been slightly modest lately. A lot of things have been going on leaving the writing of articles behind and now freddes.se will move to a web hosting service instead.

By moving freddes.se I will still have the chance to pick up the writing again. Let’s see if there will be more articles published here later on… I have a couple of things in my head and maybe some day…

Anyways, the site will still be around for a while but there will be glitches in the up-time during the move of course.

 Posted by Fredde at 11:55

Hobby projects and books

 .NET, ASP.NET, ASP.NET MVC Framework, Books, REST  No Responses »
Mar 172009
 

I haven’t had time for any article writing lately, because of the simple fact that I have prioritized my hobby projects.

I have finally started using the ASP.NET MVC Framework, together with jQuery and a RESTful web service, using the WCF REST Starter kit. These frameworks and libraries are some really great stuff! Have a look at my project blog on http://develop.freddes.se/blog.

My good friend Gabriel Svennerberg, writing about useability on http://www.svennerberg.com, told me about a new book coming out soon, about the ASP.NET MVC Framework. There is a sample chapter available for downloading on http://www.asp.net/mvc. I haven’t read it yet, but will do so as soon as possible. Right now I’m reading another book, RESTful Web Services by by Leonard Richardson (Author), Sam Ruby (Author), David Heinemeier Hansson (Foreword), which is a great book so far.

 Posted by Fredde at 00:07  Tagged with: , , ,

REST really is the right path to take

 REST  No Responses »
Mar 052009
 

restThe last week I’ve been busy, or shall I say lost in the world of RESTful Services. I have been reading white papers, watching screencasts, trying out the WCF REST Starter Kit on http://msdn.microsoft.com/wcf/rest and been totally amazed by the philosophy of RESTfulness.

Since I have been implementing SOAP web services for quite a while now, I have had a fairly ignorant attitude to the REST architecture up until the ASP.NET MVC Framework has gained popularity in the web development world. This along with me, just by a coincidence, stumbling into the WCF REST Starter Kit was enough to be convinced that REST really is the way to do it, developing services to be published on the web that is.

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 Posted by Fredde at 09:03  Tagged with: ,
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