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30 July 2003
MS Visio Coolness
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 use the Sql Server ODBC driver I got all the Sql... Read More...
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17 July 2003
StackOverflowException in Typed Dataset
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 is also defined in the XSD schema of the typed dataset... Read More...
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07 July 2003
Set codegen:nullValue in your XSD and get... null?!
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 does, if you add the minOccurs="0" aswell. Otherwise... Read More...
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01 July 2003
Typed DataSets with many to many relationships
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 to improve the syntax of the generated code. Explained... Read More...
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16 June 2003
Should the struggle for OR mapping continue?
Paul Gielens is struggeling with OR mapping: I DO NOT want to use setters (at least not for the OID, not at all actually because the object is a read only except for the lazy loaded associations)… I've tried to make a similar framework but I'm leaning more and more towards discarding OR-mapping as an... Read More...
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25 May 2003
CMP & JDO Compared
It's always interesting checking out what they are doing on the other side of the fence. David Jordan and Craig Russel compares the two emerging persistence mechanisms on the java platform : Container Managed Persistence and Java Data Objects. The exerpt is found on O'Reilly . Read More...
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16 May 2003
Remoting Typed Datasets - the tryouts
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 could have given DeKlarit a shot, but I simply like... Read More...
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05 May 2003
Aren't Typed Datasets XSD really Contracts?
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 down to what Clemens and Steve predicates these... Read More...
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25 March 2003
Prevalence is cool
I think prevalence is cool. Why? Because it's such an "unthinkable" concept. It's almost tabu. I like the lightly smug attitude of the guys at Prevayler.org because they have actually created something based on this idea and are provocative enough for the RDBMS crowd to actually come up with good arguments... Read More...
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19 March 2003
Persist through winter
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 aswell.. Read more at Edgar Sanchez's blog Still... Read More...
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