MqttSyncClientDownloadBitmapAsync 方法

public Task<OperateResult<Bitmap>> DownloadBitmapAsync(
	string groups,
	string fileName,
	Action<long, long> processReport,
	HslCancelToken cancelToken = null
)

Public Function DownloadBitmapAsync ( 
	groups As String,
	fileName As String,
	processReport As Action(Of Long, Long),
	Optional cancelToken As HslCancelToken = Nothing
) As Task(Of OperateResult(Of Bitmap))

public:
Task<OperateResult<Bitmap^>^>^ DownloadBitmapAsync(
	String^ groups, 
	String^ fileName, 
	Action<long long, long long>^ processReport, 
	HslCancelToken^ cancelToken = nullptr
)

member DownloadBitmapAsync : 
        groups : string * 
        fileName : string * 
        processReport : Action<int64, int64> * 
        ?cancelToken : HslCancelToken 
(* Defaults:
        let _cancelToken = defaultArg cancelToken null
*)
-> Task<OperateResult<Bitmap>>