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Silverlight 4 - Make Commanding use lesser code

2010-01-03T21:57:00Z

In my previous post about using Silverlight 4 Commanding, I got a question why I didn’t use delegates etc instead of creating a lot of ICommand classes. In this post I’m going to show how you can reduce the number of ICommand classes. I have created a class with the name Command, this class implements the ICommand interface and uses two constructor arguments of a delegate type, in this case the Predicate<T> and Action<T>. I use the Predicate<T> for the ICommand.CanExecute because...(read more)

WCF RIA Services – Dynamically create a criteria on the client-side

2009-12-30T16:52:00Z

Note: This post is based on the WCF RIA Services VS 2008 PDC Beta and VS 2010 Beta 2 preview, changes can be done before the framework hits RTM. I have seen questions about how to dynamically create search criteria when using WCF RIA Services and LINQ. So this post is about how you can dynamically create a criteria as a string on the client-side and pass it down to the server for execution. There is a simple way to create a criteria on the client-side by using WCF RIA Services and LINQ and pass it...(read more)

WCF RIA Services DomainService life-cycle and adding Transactions

2009-12-29T18:53:12Z

Note: This blog post will use the WCF RIA Services PDC Beta and VS2010 Preview, changes to the framework can me made before it hits RTM. Some questions that pops up about WCF RIA Services is how to enable transactions. So I decided to write a blog post about it, but to not make this post just a few lines I also decided to write about the DomainService life-cycle so you will know what will happen step-by-step in the DomainService after a DomainContext’s SubmitChanges is called on the client-side....(read more)

Solution to minimize the loading of too much data to a DataGrid– WCF RIA Services and Silverlight

2009-12-28T22:54:00Z

Note: The WCF RIA Services examples in this post is based on the WCF RIA Services PDC Beta for VS 2008 and VS 2010 Beta 2 Preview. I have notice that a lot of developers are passing a lot of data over the wire, like they have forgot or don’t see the network between the client and the server. In this post I’m going to show how some solutions can be used to minimize the loading of data. I’m not going to mention about using techniques like GZIP compression with IIS to reduce the size, instead how to...(read more)

Silverlight exception handling using WCF RIA Services and WCF Services

2009-12-22T16:26:00Z

Note: Some examples in this post uses the WCF RIA Services PDC Beta, so changes can be done until it hit RTM. I have already mention about how to handle exceptions with WCF RIA Services here: http://weblogs.asp.net/fredriknormen/archive/2009/12/08/wcf-ria-services-exception-handling.aspx , but this post is about different ways to handle exception occurred on the client-side and how to log those exceptions. Logging Services If you want to log exceptions occurred on the client-side to the server-side...(read more)

WCF RIA Service – How to configure the WCF Service maximum items returned by the Query

2009-12-19T08:44:58Z

Note: This is post is based on the WCF RIA Services Beta for VS 2008 and changes can be done before WCF RIA Services hits RTM. There are several post on the forums about changing the default number of items passed passed from a DomainService to the client, so I decided to write a short blog post about how to configure the WCF Service of the WCF RIA Services. If you want to know how the WCF RIA Services adds default endpoints etc, you can take a look at my Deep Dive post . Have the following in mind...(read more)

WCF RIA Services Exception Handling

2009-12-08T19:20:00Z

Note: The examples in this blog post are based on the WCF RIA Services PDC beta, and changes to the framework can be done until it hits RTM. In a preview blog post I wrote about how to handle exception when using .NET RIA Services and the Load method. This blog post will be about the same but instead based on the WCF RIA Services. If you want add a generic way to log exceptions thrown on the server-side, you can override the DomainService OnError method: [EnableClientAccess()] public class DomainService1...(read more)

RIA – Should a service return the IQueryable?

2009-12-03T16:57:00Z

Note: The examples in this blog post uses WCF RIA Services PDC Beta, and changes can be made in the future to the framework. In several of my blog posts about WCF RIA Services I have used the Repository pattern to return an IEnumerable<T>, for example: public class CustomerRepository : ICustomerRepository { public IEnumerable<Customer> GetCustomers() { //... } } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color:...(read more)

WCF RIA Services – StructureMap – DomainServiceFactory

2009-12-01T09:58:30Z

Note: The example in this blog post uses the WCF RIA Services PDC Beta, so things can be changed to the final version. In a preview post I wrote about how to create a DomainServiceFactory where Microsoft Patterns & Practices Unity Dependency Injection framework is used to create a DomainService, to make sure it will inject all it dependencies. This post will be about using StructureMap instead. Before you read this post, I would like you to read my preview post to understand how to create a DomainServiceFactory,...(read more)

Silverlight 4 - MVVM with Commanding and WCF RIA Services

2009-11-30T18:38:53Z

Note: The code example in this post uses Silverlight 4 PDC Beta and WCR RIA Services PDC Beta, so some changes can be made before RTM. In my previous post I wrote about “ WCF RIA Services and a guide to use DTO/”Presentation Model” ”, and mention that I will later write a blog post about using a ViewModel. In this post I will show you how you can create a ViewModel and use Silverlight 4 Commanding to use the MVVM pattern. In this blog post I will use Unity as my Dependency Injection framework to...(read more)

WCF RIA Services Unity DomainServiceFactory

2009-11-28T17:11:00Z

Note: This post is based on WCR RIA Services PDC beta and changes can be made in a future release. In this post I will show you how it’s possible to create your own DomainServiceFactory which has the responsibility to create a DomainService instance. I decided to use Unity as a Dependency Injection framework to create my DomainServices. Why do we even want to create a custom DomainServiceFactory, well, to avoid dependencies inside our DomainServices, for example here is a DomainService which has...(read more)

WCF RIA Services and a guide to use DTO/”Presentation Model”

2009-11-28T14:10:00Z

NOTE: Examples in this blog post is based on the VS 2010 Beta 2, WCF RIA Services PDC Beta, some changes to the WCF RIA Services can happen until RTM. I have seen several questions and request about how to use Data Transfer Objects (DTO), or a ”Presentation Model” (Model created for presentation purpose) with WCF RIA Services. In this post I will write something about it. Why use DTO/”Presentation Model”? Why use DTO/”Presentation Model” at all? Well, domain entities aren’t design with presentation...(read more)

WCF RIA Services Binding Deep dive

2009-11-27T01:26:06Z

Note: This is based on WCF RIA Services beta, and some stuffs can change in a future release. As many of you may know, WCF RIA Services uses WCF. WCF uses EndPoints where we specify the ABC (Address, Binding and Contract). By default WCF RIA Services uses its own ServiceHost, call DomainServiceHost. The DomainServiceHost will add EndPoints programmatically and it will add three kind of EndPoints, WebHttpBinding (for REST), BasicHttpBinding and BinaryHttpBinding. All binding will have a MaxReceivedMessageSize...(read more)

Refresh the cached EntitySet after a SubmitChanges – WCF RIA Services

2009-11-24T18:35:48Z

Note: This post is based on the WCF RIA Services PDC Beta. There is a discussion about WCR RIA Services and how to update an EntitySet after a Submit changes, on the Silverlight forum. If we loads a set of entities they will be cached in an EntitySet on the client-side, so after a Submitting changes only the entities we have removed on the client will be removed from the client-side’s EntitySet. If someone else have removed some of the entities from the database we work against, we still have those...(read more)

Using the WebBrowser control and debug a Silverlight Out-of-browser (OOB) application in VS 2010

2009-11-23T14:53:00Z

Yesterday I played with the WebBrowser control shipped with Silverlight 4. I was trying to create a little RSS Reader for Silverlight 4, only to try out some of the new features. The WebBrowser control have two methods to display a web page, the Navigate and the NavigateToString. The Navigate takes an URI, the NavigateToString takes a string with for example HTML to be diplsyed inside of the WebBrowser window. In my case I didn’t want to use the Navigate, instead the NavigateToString so I could just...(read more)