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MS Visio Coolness
30 July 03 12:28 PM | madsn | 17 comment(s)

Yesterday I decided to fiddle around with MS Visio for Enterprise Architects database modelling tools. After drawing up and validating a pretty straight-forward use case i created a new Database Model Diagram Template from visio. After telling Visio to...

Filed under: .NET General, Object persistence, Typed DataSets

StackOverflowException in Typed Dataset
17 July 03 12:09 PM | madsn | with no comments

I just killed a System.StackOverflowException that occured when calling the GetChanges() method on my typed Dataset. I have a couple of tables in the typed dataset that are defined with self relations to represent hierarchies in the data. This relation...

Filed under: .NET General, Object persistence

Set codegen:nullValue in your XSD and get... null?!
07 July 03 02:12 PM | madsn | 1 comment(s)

Yup. That's right. You've been a good boy (or girl) and annotated your typed dataset XSD with codegen:nullValue attributes to instruct the codegenerator in how to handle DBNull values. And you actually thought the MSDataSetGenerator would care? Well it...

Filed under: .NET General, Object persistence, Typed DataSets

Typed DataSets with many to many relationships
01 July 03 11:56 AM | madsn | with no comments

Ever wondered how to construct multitable DataSets in a proper manner? Whether to use one dataadapter or several? Just found this one on MSDN: Navigation Multiple Related Tables in an ADO.NET Dataset To make it even better use Annotations in the XSD file...

Filed under: .NET General, Object persistence, Typed DataSets

Remoting Typed Datasets - the tryouts
16 May 03 04:58 PM | madsn | with no comments

Andres stepped up quickly with some hints to my previous blogentry . I tried out the ADO.NET Powertoys which contained several features. Because it was poorly documented, and I just needed one of the features, I think I'll wait for a later release. I...

Filed under: .NET General, Object persistence, Typed DataSets

Aren't Typed Datasets XSD really Contracts?
05 May 03 08:08 PM | madsn | 8 comment(s)

Roy found the xsd tool recently and got the typed datasets to scale . I still don't like them. What is really the difference in beeing dependant on the xsd schema than a dll reference? If you do the Service Oriented approach on this problem you'll come...

Filed under: .NET General, Object persistence

Persist through winter
19 March 03 12:15 AM | madsn | with no comments

Another exiting Java based project is going .NET. I've done a lot of reading on persitance frameworks and OR mapping lately and Hibernate is definately getting a go. Firstly in Java, but hopefully the guys at the NHibernate project can get something going...

Filed under: .NET General, Java/J2EE related, Object persistence