In the EF version 1.0, there was a problem when one would try to update multiple contexts as part of a single transaction. For example, I can use Transaction Scope, the update one context, then second context. Here is sample code to illustrate: using (TransactionScope scope = new TransactionScope()) { try { using (RolodexEntities …
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Yesterday I was asked about a way to play animations in MVVM environment. So, I gave this some thought today, and came up with a few ideas. First, and the easiest way is to separate ViewModel from animation by attaching an animation to a behavior. Here is how we would write the behavior: public class …
Today I am continuing exploring WCF RIA Services. I am going to discuss validation in RIA Services. Any business application needs to validate user input. I am going to start with a simple case. In my sample application a user can enter a company information. I would like to setup RIA Services to force the …
I just want to relay Microsoft’s new offer to everyone. Windows Azure is now offered for free for a limited time. This is an introductory offer to get more people to use new cloud platform from Microsoft. Please see this link for details.
I spoke at Atlanta.NET Users Group yesterday, My topic was Azure Step-by-Step. I talked about why someone would use Windows and SQL Azure, then I built a Silverlight application from scratch. The application was designed to run in Windows Azure and use SQL Azure as database. I demonstrated how to get maximum code re-use between …
In this post I will cover the update process. I am going to recap where I left off in the last post on RIA Services. The last step was to retrieved based on ID from a read only company object. Once this object is obtained in the VIewModel, we can create a screen to edit …
As I mentioned previously, I presented on the topic of Velocity at the Atlanta Leading Edge Microsoft Users Group on Tuesday, January 19th. The talk went pretty well, we had a lot of technical questions. I really enjoyed this presentation, as I am always excited to speak on a new topic that I have not …
I am going to continue exploring the topic of RIA services and Silverlight. I thought I was going to get into updates in this post, but there are a few topics I would like to cover first. I am going to try to get to updates in the next post. Today, I am going to …
As always I had fun presenting at Gwinnett Georgia Microsoft Users Group on Thursday. The subject of my talk was “Getting started with SQL Azure”. I documented all the steps in this blog post. There are also useful links that I mentioned in this post to help you get started. There are many advantages to …
I have just been selected to receive the Microsoft MVP award! This is an awesome news! I feel honored and humbled that Microsoft recognized my efforts in learning Microsoft technologies and being active in local Microsoft oriented developer communities, user groups and events. At the risk of making cliché comments, I would like to recognize …