Initiates an operation to get the initial offer from the MediaProvider implementation.

Namespace:  Microsoft.Rtc.Collaboration.ComponentModel
Assembly:  Microsoft.Rtc.Collaboration(in Microsoft.Rtc.Collaboration.dll)

Syntax

Visual Basic (Declaration) 
Protected 
MustOverride 
Function 
BeginGetOffer ( _
	
offerAnswerContext 
As 

OfferAnswerContext, _
	
lastLocalOutgoingSdps 
As 
Collection(
Of 

SdpContentDescription), _
	
userCallback 
As 
AsyncCallback, _
	
state 
As 
Object _
) 
As 
IAsyncResult
C# 
protected 
abstract 
IAsyncResult 
BeginGetOffer(
	

OfferAnswerContext 
offerAnswerContext,
	
Collection<

SdpContentDescription> 
lastLocalOutgoingSdps,
	
AsyncCallback 
userCallback,
	
Object 
state
)
Visual C++ 
protected:
virtual 
IAsyncResult^ 
BeginGetOffer(
	

OfferAnswerContext^ 
offerAnswerContext, 
	
Collection<

SdpContentDescription^>^ 
lastLocalOutgoingSdps, 
	
AsyncCallback^ 
userCallback, 
	
Object^ 
state
) 
abstract
JavaScript 
function 
beginGetOffer(
offerAnswerContext, 
lastLocalOutgoingSdps, 
userCallback, 
state);

Parameters

offerAnswerContext
Type: Microsoft.Rtc.Collaboration.ComponentModel . . :: . OfferAnswerContext
The OfferAnswerContext for the corresponding call.
lastLocalOutgoingSdps
Type: Collection < (Of < ( SdpContentDescription > ) > )
Last outgoing local SDPs, which can be null if this method is invoked for an initial offer.
userCallback
Type: AsyncCallback
The method to be called when the asynchronous operation is completed.
state
Type: Object
A user-provided object that distinguishes this particular asynchronous operation from other asynchronous operations.

Return Value

An IAsyncResult that references the asynchronous operation.

Remarks

The last local outgoing SDP can be either the last outgoing offer or answer. An outgoing offer can contain multiple SDP session descriptions.

See Also