Tonight I ran into the following error message when using a freshly installed version of SQL Server 2008 in a new project. Saving changes is not permitted. The changes you have made require the following tables to be dropped and re-created. You have either made changes to a table that can't be re-created or enabled the option Prevent saving changes that require the table to be re-created. The error appeared after I created a new table, set up it's primary key column, clicked save, and then tried to modify and re-save the table again. The reason this error dialogue is being...

In the last post we saw how easy it is to reverse engineer a database schema. Let's now use the resulting persistent classes library to build the first website. Let's do it again step by step: Step 1: Use the resulting solution from the northwind reverse engineering post. Step 2: Add a new web application by execution File->Add->New Web Site... from the Visual Studio Menu. Choose ASP.NET Web Site. Step 3: Add a reference from the website to the class library. Select the website project in the Solution Explorer and execute Website->Add reference from the Visual Studio Menu. Select the class library project in the Projects tab.   All...

Hi everybody, My name is Jan Blessenohl and I am working on the new Telerik object relational mapper named OpenAccess ORM. In the next posts I would like to guide you through the first steps with OpenAccess. This post is about reverse engineering. The following posts will use this feature to build running applications. - OpenAccess comes with 2 possible ways to generate the persistent model: Forwad Mapping: Write the persistent classes first and let then OpenAccess generate the database schema. Reverse Engineering: Design the database schema first, let OpenAccess read it and then create all the classes for you. This step by step...

Hi everyone, My name is Velin Angelov. I am a member of Telerik's Charting team and here I am going to write about a feature of the RadChart for WPF which you might find useful while having fun with it. RadChart for WPF was shipped with the 2008.Q3 release and one feature all of the charts have in common is being animated. From this point on there are three options: You are absolutely happy (as you probably will) with the default animation settings provided by RadChart. In this case you simply keep on coding. You totally disagree with the way RadChart is animated and...

Seems I’ve gotten my 15 minutes of fame after all (more like 5). During PDC’08 Todd and I had the chance to meet with Adam Kinney from Microsoft and talk about one of the coolest new telerik products – the WPF Charts and Gauges. The video is now up on Channel 9 and can be accessed here. In the mean while we pulled off our first release and the charts and gauges are now a part of the WPF controls suite. You can see them in all their splendor here. If you are excited about the charts as we are – share...