PowerShell cannot find overload

Question

I'm attempting to use https://sshnet.codeplex.com/ to allow a PowerShell script to upload a file to a SFTP server. Everything appears to work, except it cannot find an overload of the method UploadFile and am stumped.

The definition of the method is here

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)

I'm trying to use this overload

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

The field uploadCallback is optional according to the documentation and isn't needed in my simple script, but even adding that in fails. The ways I've tried calling this with is as follows, they all fail.

How do I successfully call one of these methods? Examples of what I tried are below.

Examples

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

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

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

Fails with

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

The next attempts all fail with the same error message essentially

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

Error

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

Attempted with a $null 3rd parameter

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

Failed with

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

Try $client.UploadFile($sourceStream, "$ftpPath$output", [Action[uint64]]$null). Also, is $sourceStream a stream i.e. does $sourceStream -is [System.IO.Stream] return True? — Keith Hill
– Keith Hill, Commented Oct 16, 2014 at 22:35
It might help to trim this post down. It's got a lot to go through to get to the meat of the question. Maybe even reorganize it so some more important details are at the beginning. — jpmc26
– jpmc26, Commented Oct 16, 2014 at 23:38
@KeithHill That was the problem, I was passing a StreamReader instead of a Stream. If you fill out an answer I'll accept it, thank you. — Kirk
– Kirk, Commented Oct 17, 2014 at 14:31

Keith Hill · Accepted Answer · 2014-10-17 17:54:08Z

5

Try giving PowerShell a bit more help by providing the type info as cast in the method call e.g.:

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

answered Oct 17, 2014 at 17:54

Keith Hill

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