updating List views SharePoint PowerShell

Question

I want to be able to update the "JSLink" property on all views in two different lists. However I keep getting the following error:

"Collection was modified; enumeration operation may not execute."

I have the following PowerShell:

Add-PSSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue


#Temp Site
$siteColl = "mysitecollectionURL"

$site = Get-SPSite $siteColl

#JS file to add
$jSFile = "clienttemplates.js"

#Lists to update
$masterTasks = "Master Tasks"
$allTasks = "All Tasks"


        Write-Host "`nChecking site:" $site.RootWeb.URL

        #Get root web
        $web = $site.RootWeb

        #Iterating lists
        foreach($list in $web.Lists)
        {   
            if($list.Title -eq $masterTasks)
            {
                write-host "`n`tMaster Tasks list found"

                #Iterating views
                foreach($view in $list.Views)
                {
                        $view.JSLink = $jSFile
                        $view.Update()
                }
            }

            if($list.Title -eq $allTasks)
            {
                write-host "`n`tAll Tasks list found"

                #Iterating views
                foreach($view in $list.Views)
                {
                        $view.JSLink = $jSFile
                        $view.Update()
                }
            }
        }
        $web.Dispose()


Write-Host "`n"

Answer 1

Hi @DevP ,

It's not supported to use add/delete/update method inside foreach loop, otherwise you would get this error.

You need to use for loop instead to achieve this:

  For($i=0; $i -lt $web.Lists.count; $i++)  
    {  
       if($web.Lists[$i].Title  -eq $masterTasks)  
       {  
             write-host "`n`tMaster Tasks list found"  
  
           For($j=0; $j -lt $list.Views.Count; $j++)  
           {  
                    $view=$list.Views[$j]  
                    $view.JSLink  = $jSFile  
                    $view.Update()  
           }  
       }  
  
       if($web.Lists[$i].Title  -eq $allTasks)  
        {  
            write-host "`n`tAll Tasks list found"  
      
            #Iterating views  
      
           For($j=0; $j -lt $list.Views.Count; $j++)  
           {  
                    $view= $list.Views[$k]  
                    $view.JSLink  = $jSFile  
                    $view.Update()  
           }  
        }       
    }  

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