🚀 go-pugleaf

Gaetano Piazza <gapsoft@tin.it> wrote in message 39f540f8$1_2@dnews...
> Now I am learning how to use multi tier in c++Builder and I have some
> difficulties, so I need your help, thank you!
I have just found the solution. I have included an empty main form in the
server project and now the server starts regularly. However I don't
understand why changes mades with client module don't be applied to the
serever table, do you help me, please?
Thank you for your help.
Tano Piazza (from Italy)

Bonjourno (excuse the bad written Italian)


> ..However I don't understand why changes mades with client module don't be
> applied to the
> serever table, do you help me, please?

  In the client application, you need to say
ClientModule1->ClientDataSet1->ApplyUpdates(-1);  This will force a commit to
the database.  Also, you may not want to treat the DB Updates on the client,
you may want to do that on the server.  As a result, go to your server
application and play around with DataModule->DataSetProvider options.  You
will see an option to "Resolve to dataset = True/False".  Play around with
this switch and take a look at what happens when you try the ApplyUpdates
from your client.  You will notice that the ApplyUpdates(-1) behaves
differently.

Good Luck
Nick,
Borland forever ...

Hi Gaetano,
Can you try to have the client running on another machine?.  I have a
problem when I do that. After I enter the guid to the DCOMConnection1, the
Servername is blank in the combo box.  In addition, after I entered the
computername and change active to true, I received an error message "Access
Invalid".  If you or anyone know what I did wrong please help.  Thanks.

Steve

Gaetano Piazza <gapsoft@tin.it> wrote in message news:39f540f8$1_2@dnews...
> Now I am learning how to use multi tier in c++Builder and I have some
> difficulties, so I need your help, thank you!
> I have done the following steps:
> 1. I have created a new application project, and save it as
"ProjectServer";
> 2. In this project I have created a new remote data module by choosing  it
> from Menu File-New-Multitier-Remote Data Module, and save it as
> "ServerDataModule"
> 3. I have added a DataSetProvider and a Table components (named
> DataSetProvider1 and Table1) in this remote data module;
> 4. I have done the following assignments:
> Table1->DatabaseName = DefaultDD;
> Table1->TableName = bdesdd.db;
> DataSetProvider1->DataSet = Table1;
> 5. I have compiled and executed the project;
> 6. In addition I have registered the server with the following line
command
> from Start-Execute:
> C:\Programmi\Borland\CBuilder5\Projects\ProjectServer.exe /regserver
> 7. I have created another application project named ProjectClient;
> 8. I have added in that project a ClientDataSet and a DCOMConnection
> components (named ClientDataSet1 and a DCOMConnection1)
> 9. I have done the following assignments:
> DCOMConnection1->ServerName = ProjectServer.ServerDataModule (I have
chosen
> the unique name appeared in the combobox list);
> DCOMConnection1->ComputerName = <the same computer name where I was
> working>;
> ClientDataSet1->RemoteServer =  DCOMConnection1;
> 10. Thus when I tried to assign ClientDataSet1->ProviderName, or when I
> tried to assign DCOMConnection1->Connected = true, has appeared the
> following operating system error message: "Server execution failed". This
> message could be a bit different in English operating system version
because
> I translated it from Italian "Esecuzione del server non riuscita".
>
> Thank you for your help.
> Tano Piazza (from Italy)
>
>
>
>