db4o Developer Community

Hi, I have  a problem with isalive() method. When i killed the server, Isalive never return, and this exeptions throwing continually in the background when debugging in VS. i use db4o 7.2, and c# server:public static void Main(string[] args)  {  Console.WriteLine(''star'');  IExtObjectServer server = ...

I used db4o client/server features and added objects at the server end and committed them. When I try to get those objects in a client program using Native Queries the IList<> always returns 0 objects. Using Query by example I get the desired result.I know my query is right because I tested it on the server program and it works but somehow ...

Hi Db4o, I have problems with enums in a network database, c# environment, version Continues Build july 9th, 2008.     public enum GroupEnum { First, Second, Third }    public class Student2    {        public GroupEnum ...

    [Serializable]     public class Task     {         //pojo 省去代码 }       [Serializable]     public class Role     {         private IList<SystemUser> ...

Hello,  I wrote an component in C# for  an application that is supposed to make it possible for standard PDA user to persist any kind of data object (like birthdays, addresses and whatsoever) and we use Db4o Compact (version 7.2) for that. My component has the job to provide the necessary  operation  to the GUI , so  the ...

I would like to determine which objects are present in an IObjectSet, using Reflection. I folund the reflection example source, but it assumes that the object type is known. What I want to do is to write a method getting an IObjectSet parameter, then find out information about it. I need the object type and its properties.   Could you give ...

PROBLEM:  I get errorUnexpected token: 'Token(Kind: Number, Value: '20080523')' ps: in VS 2008 i created c# project '20080523 db4o test' and tried to do Tutorial Chapter1 test.CONCLUSION (and work around):Don't Created Projects that begin with Numbers.-- Details ----------------------I created C# Solution in Visual Studio 2008 with name ...

Hi All,  Well i guess the Title says it all i guess. I'm new to the OODB Idea, but looks fascinating..i tried a couple of tutorials on C#, worked great and the idea behind it is fantastic. I come from a Java / Hibernate background so its a very close feeling.  Since i come from a RDBMS environment i'm used to having ...

I was going thru some of this stuff, but I'd found no answer for auto-increment on db4o-tutorial, so here's what I came up with, I'd really enjoy if you guys would give your points of view about it... Simple OO stuff, let's make a SuperEntity abstract class..I'm using C# for it.  using Db4o; public abstract class SuperEntity { } ...

Hello to all.  i am very new to DB4o  love it.  i have a heirarchy of 3 classes.. user > category > profile   i want to delete a level and also all level underneath it.   for example.. if i delete category it shuld delete profile too. but in my case.. it is deleting all References..  ...