Query the chat history for the specified collection of chat rooms, using the designated EndQueryChatHistory(IAsyncResult) .

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

Syntax

Visual Basic (Declaration) 
Public 
Function 
BeginQueryChatHistory ( _
	
chatRooms 
As 
ICollection(
Of 
Uri), _
	
query 
As 

ChatHistoryQueryOptions, _
	
userCallback 
As 
AsyncCallback, _
	
state 
As 
Object _
) 
As 
IAsyncResult
Visual Basic (Usage) 
Dim 
instance 
As 

GroupChatServices
Dim 
chatRooms 
As 
ICollection(
Of 
Uri)
Dim 
query 
As 

ChatHistoryQueryOptions
Dim 
userCallback 
As 
AsyncCallback
Dim 
state 
As 
Object
Dim 
returnValue 
As 
IAsyncResult

returnValue = instance.
BeginQueryChatHistory(
chatRooms, _
	
query, 
userCallback, 
state)
C# 
public 
IAsyncResult 
BeginQueryChatHistory(
	
ICollection<
Uri> 
chatRooms,
	

ChatHistoryQueryOptions 
query,
	
AsyncCallback 
userCallback,
	
Object 
state
)

Parameters

chatRooms
Type: System.Collections.Generic . . :: . . ICollection < (Of < ( <' Uri > ) > ) >

The chat rooms to query.

query
Type: Microsoft.Rtc.Collaboration.GroupChat . . :: . . ChatHistoryQueryOptions

The query.

userCallback
Type: System . . :: . . AsyncCallback

The method to be invoked when this asynchronous operation completes.

state
Type: System . . :: . . Object

An object to be passed back to the callback.

Return Value

Type: System . . :: . . IAsyncResult

An IAsyncResult that references this operation.

Exceptions

Exception Condition
[System.ArgumentException]

Thrown when invalid arguments are passed.
[Microsoft.Rtc.Collaboration.GroupChat.ChatServerConnectionException]

Thrown when the GroupChatEndpoint is not established.
[System.InvalidOperationException]

Thrown when the chat server connection is not in a valid state to send the command.
[RealTimeException]

Thrown when the GroupChatEndpoint encounters an error communicating with the group chat server.

Remarks

This request will be processed asynchronously. See EndQueryChatHistory(IAsyncResult) to complete this asynchronous operation.

See Also