Finds all subcategories of the parent category referenced by parentCategory. To find chat rooms within a category, use BeginFindChatRoomsByParentCategory(Uri, AsyncCallback, Object) .

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

Syntax

Visual Basic (Declaration) 
Public 
Function 
BeginFindCategoriesByParentCategory
( _
	
parentCategory 
As 
Uri, _
	
userCallback 
As 
AsyncCallback, _
	
state 
As 
Object _
) 
As 
IAsyncResult
Visual Basic (Usage) 
Dim 
instance 
As 

ChatRoomCategoryManagementServices
Dim 
parentCategory 
As 
Uri
Dim 
userCallback 
As 
AsyncCallback
Dim 
state 
As 
Object
Dim 
returnValue 
As 
IAsyncResult

returnValue = instance.

BeginFindCategoriesByParentCategory(
parentCategory, _
	
userCallback, 
state)
C# 
public 
IAsyncResult 

BeginFindCategoriesByParentCategory(
	
Uri 
parentCategory,
	
AsyncCallback 
userCallback,
	
Object 
state
)

Parameters

parentCategory
Type: System . . :: . . Uri

The parent category.

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
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 EndFindCategoriesByParentCategory(IAsyncResult) to complete this asynchronous operation.

See Also