Hello.

I am creating a TDBISAMDatabase component inside the Execute method of a TService component in C++. I do not have problems in creating it, but when I assign a value to one of its properties (for example, SessionName...) the code does it but it is
not actually updated, so the watch list indicates that this value is still NULL. Therefore, I have problems to open a connection inside a TService object ( I want to create a service under W2000).

It´s the first time I am creating a service in C++ builder 6 enviroment, so I am not sure if DBISAM components have problems with this.

Please any clue will be welcomed.  I can give you some code if needed.

Thanks for the support.

Regards.

Jabob

There is no problems with DBISAM and Windows Services. DBISAM server is an
example of this kind of application.

My question is: Is this a multi-thread application ?

Eduardo

Jacob,

<< I am creating a TDBISAMDatabase component inside the Execute method of a
TService component in C++. I do not have problems in creating it, but when I
assign a value to one of its properties (for example, SessionName...) the
code does it but it is not actually updated, so the watch list indicates
that this value is still NULL. Therefore, I have problems to open a
connection inside a TService object ( I want to create a service under
W2000). >>

Could you post the code that you're using to create the TDBISAMDatabase
component ?  I suspect that the component is not being created properly or
that you're using an invalid reference to the component instance.

--
Tim Young
Elevate Software
www.elevatesoft.com

"Jose Eduardo Helminsky" <contato@hpro.com.br> wrote:

Jabob

There is no problems with DBISAM and Windows Services. DBISAM server is an
example of this kind of application.

My question is: Is this a multi-thread application ?

Eduardo

//--------------------

I am creating a thread inside the OnStart event of TService, as I have seen in many tutorials, but the DBISAM components are created in two different ways:

1) I have added a TDatamodule with some DBISAM comp. They have a correct reference and some properties are correct, but still string propertires are always
set to NULL and I have no chance of changing it.

2) I create a TDBISAMDatabase component inside the OnStart event. I use this code:

void __fastcall TMonitorizacion::ServiceStart(TService *Sender,
     bool &Started)
{
       TDBISAMDatabase * base;

       base = new TDBISAMDatabase(NULL);
       base->SessionName = "this";
       delete base;
}

Before I destroy "base", I check SessionName property.  Its value is NULL, no matter if I assigned "this" the sentence before.

Jacob,

<< I am creating a thread inside the OnStart event of TService, as I have
seen in many tutorials, but the DBISAM components are created in two
different ways:

1) I have added a TDatamodule with some DBISAM comp. They have a correct
reference and some properties are correct, but still string propertires are
always set to NULL and I have no chance of changing it. >>

Which DBISAM components are being created in the data module ?  Is the data
module being used from within the thread that you create ?

<< 2) I create a TDBISAMDatabase component inside the OnStart event. I use
this code:

void __fastcall TMonitorizacion::ServiceStart(TService *Sender,
     bool &Started)
{
       TDBISAMDatabase * base;

       base = new TDBISAMDatabase(NULL);
       base->SessionName = "this";
       delete base;
}

Before I destroy "base", I check SessionName property.  Its value is NULL,
no matter if I assigned "this" the sentence before. >>

Is there a TDBISAMSession already created called "this" in your service
application anywhere ?

--
Tim Young
Elevate Software
www.elevatesoft.com