How to add a default value in a site column for every item in a document library

Question

HI
i created a content type with some site columns ,
and included in a Document library.
Process ( content type)
-ProcessNo
-ProcessName
after that i uploaded 100 Documents but not  added value in a site column process name.
now  how i add a default value in a site column for every document in a document library 
adil

Answer 1

HI
i get below error when i change the script 
PS C:\scripts> C:\Scripts\updatedefaultvalue.ps1
Cannot index into a null array.
At C:\Scripts\updatedefaultvalue.ps1:8 char:7
+ IF($i[ <<<< "Title"] -eq $null)
    + CategoryInfo          : InvalidOperation: (Title:String) [], RuntimeExce
   ption
    + FullyQualifiedErrorId : NullArray
$web = Get-SPWeb http://tspmcwfe:89/
$list = $web.Lists["test"]
$item = $list.Items | Where { $_["Name"] -eq "Emc" }
foreach($i in $items)
IF($i["Title"] -eq $null)
         $i["Title"] = "test"
       $i.Update()
adil
Why are you piping a where in the items? Do you only want to add the "test" to ones matching
a name?
If you have ISE installed on your server I recommend you put your code in there and debug it. 
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