Handling +SDP results

Clients that make service and attribute queries through CSdpAgent must +implement the MSdpAgentNotifier interface +to handle the responses.

How to create an object to handle inquiry results

There +are two kinds of results that require handling, they are:

Service Search Results, +and
Attribute Read Results

We will examine a simple handling example for both kinds below.

Note: +Queries are asynchronous.

Handling service search results

When a service +search request completes, it calls the NextRecordRequestComplete():

virtual void NextRecordRequestComplete(TInt aError, TSdpServRecordHandle aHandle, TInt aTotalRecordsCount)

aHandle gives the service record handle of the matching +service, and can be used in a subsequent attribute query. aTotalRecordsCount gives +the total number of matching records.

Handling attribute read results

When an attribute +request completes, each single attribute is returned with its attribute ID +using AttributeRequestResult().

virtual void AttributeRequestResult(TSdpServRecordHandle aHandle, TSdpAttributeID aAttrID, CSdpAttrValue* aAttrValue)

The ID of the attribute is given in aAttrID, and the +attribute value itself in aAttrValue. You can find the type +of the attribute through aAttrValue->Type(), cast aAttrValue on +this base to the correct subclass of CSdpAttrValue: +for example, if the type is ETypeBoolean, +you can cast aAttrValue to a CSdpAttrValueBoolean.

When +there are no more attributes to be returned, AttributeRequestComplete() is +called.

Where Next?

The complete set of Service Discovery +Agent tutorials are shown below:

Querying +the SDP database
Reading +remote SDP service attributes
Handling SDP query +results - This document

Also refer to the Bluetooth +Service Discovery Agent Overview and the Bluetooth +SDP Overview for additional background information.