db4o Developer Community

Olá!Tenho uma dúvida que tenho certeza que muitos ainda vão terão (se já não tiveram) em relação a busca dinâmica. Por ex: Em um formulário com alguns campos, por exemplo, Nome, Cidade, uma combo de Departamentos, e uma de Cargos, ambas populadas por seus respectivos objetos, onde o usuário fará uma busca de que se não preencher nenhum campo e ...

Hi. That computer technology evolves day by day and the amount of information in this area is gigantic many of you already know (so do I), but today I was talking to a friend of mine and I realized how many books I want to ready (only in the subject Windows + .Net). If you are curious you can see the list here but most of them were not published ...

Hi, Just to let you know I've posted about Transparent Activation / Persistence to db4o blogs ;) Adriano

C# 4.0: Meet the Design Team Have fun Adriano

As the popular saying  tell us, there's no such thing as free lunch. It is no different for work related subjects. When we introduced Transparent Activation (TA) concept we knew that it could make developer's life easier (by presenting a simpler model for object life cycle): developers would not be required to think about activation depths ...

Hi, In the first installment of this series I presented the idea of having a typesafe way to configure db4o. In the second one, I explored how we could use expression trees to figure out a property name being accessed. In this post I'll address the issue on how to dive into the property's IL (intermediate language) to come up with a field name ...

Hi, Today's post is in the series ''what is wrong with this code'' but before presenting the actual problematic code I want to give some background, so bear with me. At Db4o we run migration tests (regularly) in order to guarantee that we are able to load (and query) databases created by older versions of Db4o engine. The way it's accomplished ...

Hi! Today I got an ''job opportunity'' from one of jobs sites I'm registered (no, I'm not looking for a new job, I just didn't unregistered) with a really intriguing subject: A skilled professional with 3 years of experience in C, Sharp and VB.NET. I have to admit that I do know C and also a little of VB.NET, but I have never seen SHARP :) Ok, ...

As of Today our so far internal java to c# conversion utility, sharpen, is being released as free software. As an example of its usage we're going to write a simple contact management application in java and convert it to c#. While it is possible to use sharpen to convert a complete application it is advisable to handle this as an iterative ...

In my last post I proposed to derive field names from a property accessor in order to gain type safety and compiler support when configuring some aspects of D4bo. So, given the following class:public class Test { private int _age; public int Age { get { return _age; } set { _age = value; } } }we could use the following ...