PowerShell找不到重载

Question

我试图使用https://sshnet.codeplex.com/允许PowerShell脚本将文件上传到SFTP服务器。一切似乎都可以正常工作，除非找不到方法的重载UploadFile并陷入困境。

方法的定义在这里

TypeName   : Renci.SshNet.SftpClient
Name       : UploadFile
MemberType : Method
Definition : void UploadFile(System.IO.Stream input, string path, System.Action[uint64] uploadCallback),
             void UploadFile(System.IO.Stream input, string path, bool canOverride, System.Action[uint64] uploadCallback)

我正在尝试使用此重载

UploadFile(System.IO.Stream input, string path, System.Action[uint64] uploadCallback)

uploadCallback根据文档，该字段是可选的，在我的简单脚本中不需要该字段，但是即使添加该字段也会失败。我尝试使用此方法的方法如下，但都失败了。

如何成功调用这些方法之一？我尝试过的示例如下。

例子

$client = New-Object Renci.SshNet.SftpClient($ftpHost, $ftpPort, $ftpUser, $ftpPass)
$client.Connect()

# ... get stream of file to upload here ...

$client.UploadFile($sourceStream, "$ftpPath$output")

与失败

Cannot find an overload for "UploadFile" and the argument count: "2".
At F:\MyScript.ps1:170 char:2
+     $client.UploadFile($sourceStream, "$ftpPath$output")
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], MethodException
    + FullyQualifiedErrorId : MethodCountCouldNotFindBest

下次尝试都将失败，并且本质上是相同的错误消息

$action = [System.Action[uint64]]
$client.UploadFile($sourceStream, "$ftpPath$output", $action)

错误

Cannot find an overload for "UploadFile" and the argument count: "3".
At F:\MyScript.ps1:170 char:2
+     $client.UploadFile($sourceStream, "$ftpPath$output", $action)
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], MethodException
    + FullyQualifiedErrorId : MethodCountCouldNotFindBest

尝试使用$null第三个参数

$client.UploadFile($sourceStream, "$ftpPath$output", $null)

失败

Cannot find an overload for "UploadFile" and the argument count: "3".
At F:\MyScript.ps1:169 char:2
+     $client.UploadFile($sourceStream, "$ftpPath$output", $null)
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], MethodException
    + FullyQualifiedErrorId : MethodCountCouldNotFindBest

Answer 1

尝试通过在方法调用中提供类型信息来为PowerShell提供更多帮助，例如：

$client.UploadFile($sourceStream, "$ftpPath$output", [Action[uint64]]$null)