Write-Progress

Write-Progress [-Activity] <string> [-Status] <string> [[-Id] <int>] [-Completed] [-CurrentOperation <string>] [-ParentId <int>] [-PercentComplete <int>] [-SecondsRemaining <int>] [-SourceId <int>] [<CommonParameters>]

C:\PS>for ($i = 1; $i -lt 101; $i++ ) 
{for ($j=0;$j -lt 10000;$j++) {} write-progress -activity "Search in Progress" -status "% Complete:" -percentcomplete $i;}

This command displays the progress of two nested For loops. The first loop counts to 100. For each increment of that loop, the second loop counts to 10,000.
The Write-Progress command includes a status bar heading ("activity"), a status line, and the variable $i (the counter in the For loop), which indicates the relative completeness of the task.

C:\PS>for($i = 1; $i -lt 101; $i++ ) {write-progress -activity Updating -status progress-> -percentcomplete $i -currentOperation OuterLoop} for($i = 1; $i -lt 101; $i++ ) {write-progress -activity Updating -status progress -percentcomplete $i -id  1 -currentOperation InnerLoop}

Updating 
   progress ->
   [oooooooooooooooooo                                                   ]

   OutsideLoop

Updating
  progress  
  [oooooooooooooooooo                                                    ]

  InnerLoop


Description
-----------
This example displays the progress of two nested For loops, each of which is represented by a progress bar.

The Write-Progress command for the second progress bar includes the Id parameter that distinguishes it from the first progress bar. Without the Id parameter, the progress bars would be superimposed on each other instead of being displayed one below the other.

C:\PS>$events = get-eventlog -logname system

C:\PS> $events | foreach-object -begin {clear-host;$i=0;$out=""} `
-process {if($_.message -like "*bios*") {$out=$out + $_.Message};
$i = $i+1;`
write-progress -activity "Searching Events" `
-status "Progress:" -percentcomplete ($i/$events.count*100)} `
-end {$out}

This command displays the progress of a command to find the string "bios" in the System event log. 

In the first line of the command, the Get-EventLog cmdlet gets the events in the System log and stores them in the $events variable. 

In the second line, the events are piped to the ForEach-Object cmdlet. Before processing begins, the Clear-Host cmdlet is used to clear the screen, the $i counter variable is set to zero, and the $out output variable is set to the empty string. 


In the third line, which is the Process script block of the ForEach-Object cmdlet, the cmdlet searches the message property of each incoming object for "bios". If the string is found, the message is added to $out. 

In the fourth line, the $i counter variable is incremented to record that another event has been examined. 

The fifth line uses the Write-Progress cmdlet with values for the Activity and Status text fields that create the first and second lines of the progress bar heading, respectively. The PercentComplete parameter value is calculated by dividing the number of events that have been processed ($i) by the total number of events retrieved ($events.count) and then multiplying that result by 100. 

In the last line, the End parameter of the ForEach-Object cmdlet is used to display the messages that are stored in the $out variable.