BeginDownloadFile Method
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Downloads a file from the chat room.
Namespace: Microsoft.Rtc.Collaboration.GroupChat
Assembly: Microsoft.Rtc.Collaboration.GroupChat (in Microsoft.Rtc.Collaboration.GroupChat.dll)
Syntax
'Declaration
Public Function BeginDownloadFile ( _
job As ChatRoomFileDownloadJob, _
userCallback As AsyncCallback, _
state As Object _
) As IAsyncResult
'Usage
Dim instance As ChatRoomSession
Dim job As ChatRoomFileDownloadJob
Dim userCallback As AsyncCallback
Dim state As Object
Dim returnValue As IAsyncResult
returnValue = instance.BeginDownloadFile(job, _
userCallback, state)
public IAsyncResult BeginDownloadFile(
ChatRoomFileDownloadJob job,
AsyncCallback userCallback,
Object state
)
Parameters
- job
Type: Microsoft.Rtc.Collaboration.GroupChat.ChatRoomFileDownloadJob
The file download job.
- 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. |
| [Microsoft.Rtc.Collaboration.GroupChat.ChatRoomSessionStateException] | Thrown when the ChatRoomSession is not joined. |
| [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. |
| [System.Web.Services.Protocols.SoapException] | Thrown when the group chat web service encounters an error processing the request. |
Remarks
This request will be processed asynchronously. See EndDownloadFile(IAsyncResult) to complete this asynchronous operation.