Upload a file as iFile using iControl - powershell

Question

Is there a way to update the contents of an existing iFile? I didn't see any way to update the contents. So, I started looking at deleting and creating a file by uploading a local file to the BigIP using the iControl. I understand there are two objects to use - iFileFile and then iFile in that order.
Can somebody please provide usage for this? Below is what I started with and get the error below. What would be the correct parameters for iFileFile.create() if I have a file named random_key_file1 in the same location as the powershell script? After creating the iFileFile object, how do I use the same in the iFile.create().
Below links have documentation but lack the ussage examples : https://devcentral.f5.com/wiki/iControl.LocalLB__iFile__create.ashx https://devcentral.f5.com/wiki/iControl.LocalLB__iFileFile__create.ashx
Appreciate the help.
Add-PSSnapIn iControlSnapIn
$conn = Initialize-F5.iControl -HostName $hostName -Username $username -Password $password
if($conn) {
Try
{
Write-Output "Connected to load balancer - $hostName"
$ic = Get-F5.iControl
$iFileFileObjectNames = #("file1")
$filePaths = #("random_key_file1")
$ic.LocalLBiFileFile.create($iFileFileObjectNames,$filePaths)
Write-Output ("file created")
}
Catch
{
Write-Output($error[0]|format-list -force)
}
}
else
{
Write-Error "Connection to loadbalancer failed"
}
ERROR
Exception : System.Management.Automation.MethodInvocationException: Exception calling "create" with "2"
argument(s): "Exception caught in LocalLB::urn:iControl:LocalLB/iFileFile::create()
Common::InvalidArgument
" ---> System.Web.Services.Protocols.SoapHeaderException: Exception caught in
LocalLB::urn:iControl:LocalLB/iFileFile::create()
Common::InvalidArgument
at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage
message, WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[]
parameters)
at CallSite.Target(Closure , CallSite , Object , Object , Object )
--- End of inner exception stack trace ---
at System.Management.Automation.ExceptionHandlingOps.CheckActionPreference(FunctionContext
funcContext, Exception exception)
at System.Management.Automation.Interpreter.ActionCallInstruction`2.Run(InterpretedFrame
frame)
at
System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame
frame)
at
System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame
frame)
TargetObject :
CategoryInfo : NotSpecified: (:) [], MethodInvocationException
FullyQualifiedErrorId : SoapHeaderException
ErrorDetails :
InvocationInfo : System.Management.Automation.InvocationInfo
ScriptStackTrace : at <ScriptBlock>, D:\test.ps1: line 35
at <ScriptBlock>, <No file>: line 1
PipelineIterationInfo : {}
PSMessageDetails :
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