BeginFindCategoriesByParentCategory Method

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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)


Public Function BeginFindCategoriesByParentCategory ( _
    parentCategory As Uri, _
    userCallback As AsyncCallback, _
    state As Object _
) As IAsyncResult
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)
public IAsyncResult BeginFindCategoriesByParentCategory(
    Uri parentCategory,
    AsyncCallback userCallback,
    Object state


  • 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.


Exception Condition

Thrown when invalid arguments are passed.


Thrown when the GroupChatEndpoint is not established.


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


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


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

See Also


ChatRoomCategoryManagementServices Class

ChatRoomCategoryManagementServices Members

Microsoft.Rtc.Collaboration.GroupChat.Management Namespace