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Copy-Item : Cannot bind argument to parameter 'Path' because it is null.

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This post has 6 Replies | 3 Followers

Not Ranked
Posts 3
haxxess Posted: 01-15-2010 1:54 AM

Im trying to understand a error that is being returned in powershell. Can somebody please help me understand where im going wrong with the following.

#### Error ###
Copy-Item : Cannot bind argument to parameter 'Path' because it is null.
At line:1 char:111
+ Get-ChildItem C:\users\noob\Desktop\source * -Recurse -Include *.docx,*.txt | ForEach-Object {Copy-Item <<<<
$_Name -Destination C:\users\noob\Desktop\destination}
+ CategoryInfo : InvalidData: (:) [Copy-Item], ParameterBindingValidationException
+ FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,Microsoft.PowerShell.Commands.CopyItemCommand
#### End Error ###


#### Powershell ####
Get-ChildItem C:\users\noob\Desktop\source * -Recurse -Include *.docx,*.txt | ForEach-Object {Copy-Item $_Name -Destination C:\users\noob\Desktop\destination}
#### End Powershell ####

Im trying to copy all the *.docx & *.txt files scattered inside multiple directories from inside the source folder and place them all into the destination folder without maintaining the folder structure.

Top 50 Contributor
Posts 98

$_Name  ---> $_.Name

Best regards
Martin [brima]

Not Ranked
Posts 3

Ah thanks, that fixed the bind argument error.

But now im facing another issue, the varables (if thats the correct word) are just the file names and not the full paths. If I run the following;
Get-ChildItem C:\users\noob\Desktop\source -Recurse -Include *.docx,*.txt
Will output the below ok;

    Directory: C:\users\noob\Desktop\source\folder1

Mode                LastWriteTime     Length Name
----                -------------     ------ ----
-a---        15/01/2010   5:08 PM          0 aaa.docx
-a---        15/01/2010   5:06 PM         33 dfdfsdfs.txt

    Directory: C:\users\noob\Desktop\source

Mode                LastWriteTime     Length Name
----                -------------     ------ ----
-a---        15/01/2010  12:18 PM          0 file.docx
-a---        15/01/2010   5:04 PM          0 New Text Document (2).txt
-a---        15/01/2010   5:04 PM          0 New Text Document (3).txt
-a---        15/01/2010   5:06 PM         16 New Text Document.txt

Then if I was to run the corrected Powershell line from outside a dirrerent working directory, I get "Cannot find path 'C:\aaa.docx' because it does not exist."
ect.. for each file..

PS C:\> Get-ChildItem "C:\users\sam.vaughan\Desktop\source" -Recurse -Include *.docx,*.txt | ForEach-Object {Copy-Item $_.Name -Destination "C:\users\sam.vaughan\Desktop\destination"}

Top 25 Contributor
Posts 560

Use $_.FullName instead of a $_.Name

Top 50 Contributor
Posts 98

$_ is a variable, correct a automatic variable.

You get more Infos about with:

Get-Help about_Automatic_Variables | more

Name and FullNames are Properties.

try this and you see all properties and methos for a file:

Get-ChildItem file.docx | Get-Member

and you can see the different FULLNAME and NAME with this command

Get-ChildItem file.docx | Format-List *

or shorter

gci file.docx | fl *

Top 10 Contributor
Posts 658

$_. is the current pipeline object used in script blocks, filters, the process clause of functions, where-object, foreach-object and switches. It is considered a "special pipeline variable". What comes after the $_. is the objects property.

To see what object properties there are for any given object use Get-Member like this:

  • Get-Service | Get-Member
  • Get-WmiObject Win32_Service | Get-Member

Not Ranked
Posts 3

I get it now :)
Thanks for your effort in the clarification, I can tell this place is going to be helping me out many times while im still learning PowerShell.

Again good effort.

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