and Deleting a Session: Tutorial
This tutorial shows you how to create and delete a session with
the Comms Database.
Before you start,
you must understand:
the general concept
of the Comms Database
the specific concept
of Comms Database Sessions
how to write and build
application code to run on Symbian platform
You create a session
with the Comms Database before you start to read and write the data. You can
also set the access attributes for the session.
Include the header
files, define namespaces, and declare constants.
header file defines the
classes and API items that the tool or application requires. This header file
includes all other required header files.
Define the CommsDat namesapce.
set with the
The location of this code depends on the structure of the tool or application.
// Add a declaration like this for each specific version you need.
// In this example, the major version number, the minor version number
// and the build number are all 1.
#define KCDVersion1_1 TVersion(1,1,1)
using namespace CommsDat;
Create the session.
You select the version of the interface when you create the session.
// for the version 1.1.1 defined in step 1
CMDBSession* iDb = CMDBSession::NewL(KCDVersion1_1);
Set the access attributes
for the session.
This is an optional step.
The following code allows the tool or application to see the elements
that are marked as hidden in the Comms Database. The
is an enum value of the
You can also set the other access attributes, but the hidden attribute is
the most common use case.
Delete the session
object after the tool or application has finished its use of the Comms Database
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reserved. Unless otherwise stated, these materials are provided under the terms of the Eclipse Public License