MqttSyncClientDownloadFileAsync 方法 (String, String, ActionInt64, Int64, Stream) |
从远程服务器下载一个文件到流中,需要指定文件类别,文件名,进度报告,本地保存的文件名
To download a file from a remote server to the stream, you need to specify the file category, file name, progress report, and file name saved locally
命名空间:
HslCommunication.MQTT
程序集:
HslCommunication (在 HslCommunication.dll 中) 版本:10.6.1.0 (10.6.1.0)
语法 public Task<OperateResult> DownloadFileAsync(
string groups,
string fileName,
Action<long, long> processReport,
Stream stream
)
Public Function DownloadFileAsync (
groups As String,
fileName As String,
processReport As Action(Of Long, Long),
stream As Stream
) As Task(Of OperateResult)
public:
Task<OperateResult^>^ DownloadFileAsync(
String^ groups,
String^ fileName,
Action<long long, long long>^ processReport,
Stream^ stream
)
member DownloadFileAsync :
groups : string *
fileName : string *
processReport : Action<int64, int64> *
stream : Stream -> Task<OperateResult>
参数
- groups
- 类型:SystemString
文件的类别,例如 Files/Personal/Admin 按照斜杠来区分 - fileName
- 类型:SystemString
文件名称,例如 123.txt - processReport
- 类型:SystemActionInt64, Int64
进度报告,第一个参数是已完成字节数,第二个参数是总字节数 - stream
- 类型:System.IOStream
数据流
返回值
类型:
TaskOperateResult是否下载成功
参见