Category: PowerShell

While working on my PowerShell demo scripts today, I decided to create a simple function to display my scripts during my presentations.  Here’s my new and simple Show-PSDemo function:

[sourcecode language=”powershell”]
#========================================================================
# Created with: SAPIEN Technologies, Inc., PowerShell Studio 2012 v3.1.15
# Created on: 1/13/2013 9:07 AM
# Created by: Maximo Trinidad
# Organization: PutItTogether
# Filename: Show-PSDemo_function.ps1
# Version: 0.1
#========================================================================

function Show-PSDemo{
Param([String] $FileLocation)

## – Verify for a valid file location:
if((Test-Path -Path $FileLocation) -ne $true)
{
Write-Host "No script files to execute!" `
-ForegroundColor ‘Yellow’;
Break;
}
else
{
[Array] $executethis = Get-Content $FileLocation;
};

## – Saved previous default Host Colors:
$defaultForegroundColor = $host.UI.RawUI.ForegroundColor;
$defaultBackgroundColor = $host.UI.RawUI.BackgroundColor;

## – Customizing Host Colors:
$host.UI.RawUI.ForegroundColor = "Cyan";
$host.UI.RawUI.BackgroundColor = "Black";
$StartDemoTime = [DateTime]::now; $i = 0;
Clear-Host;

Write-Host "Demo Start Time: $([DateTime]::now)" -ForeGroundColor ‘White’;
Write-Host "`t Running Script file: $FileLocation" -ForegroundColor ‘Yellow’;

foreach($line in $executethis)
{
$i++
## – Identify comment lines:
if($line.Startswith(‘#’)){
Write-Host -NoNewLine $("`n[$i]PS> ")
Write-Host -NoNewLine -Foreground ‘Green’ $($($line) + " ")
}
Else
{
## – add section identify oneliners with continuation tick:
[string] $Addline = $null;
if($line -match ‘`’)
{
#Write-Host " Found tick = `t`r`n $($line)" -ForegroundColor yellow;
$Addline = $line.replace(‘`’,”).tostring();
$Scriptline += $Addline;
$tickFound = $true;
$continuation = $true;

## – List oneliner with continuation tick:
Write-Host -NoNewLine $("`n[$i]PS> ");
Write-Host -NoNewLine $line;
}
else
{
## – identify the last line of a continuation oneliner:
if($tickFound -eq $true)
{
$Scriptline += $line;
$tickFound = $false;
$continuation = $false;

## – List oneliner with continuation tick:
Write-Host -NoNewLine $("`n[$i]PS> ");
Write-Host -NoNewLine $line "`r`n";
}
Else
{
## – Single onliner found:
$Scriptline = $line;
$continuation = $false;
Write-Host -NoNewLine $("`n[$i]PS> ")
Write-Host -NoNewLine $Scriptline "`r`n";
};
};
if($continuation -eq $false)
{
## – Executive:
Write-Host "`r`n`t Executing Script…`r`n" -ForegroundColor ‘Yellow’;
Invoke-Expression $(‘.{‘ +$Scriptline + ‘}| out-host’);
$Scriptline = $null;
}
## – ——————————————————————–
if($continuation -eq $false)
{
Write-Host "`r`n– Press Enter to continue –" -ForegroundColor ‘Magenta’ `
-BackgroundColor white;
Read-Host;
};
};
};

$DemoDurationTime = ([DateTime]::Now) – $StartDemoTime;
Write-Host ("`t <Demo Duration: {0} Minutes and {1} Seconds>" `
-f [int]$DemoDurationTime.TotalMinutes, [int]$DemoDurationTime.Seconds)
-ForeGroundColor ‘Yellow’ ;
Write-Host "`t Demo Completed at: $([DateTime]::now))" -ForeGroundColor ‘White’;

## – Set back to Default Color:
$host.UI.RawUI.ForegroundColor = $defaultForegroundColor;
$host.UI.RawUI.BackgroundColor = $defaultBackgroundColor;
};

## – loading:
## . .\Temp\Show-PSDemo_Function.ps1
## Show-PSdemo -FileLocation C:\temp\PowerShell_SQLdata.ps1
[/sourcecode]

It has one parameter “-FileLocation” which is you full folder and file location.  The file extension doesn’t matter as long is a text file with PowerShell code in it.

It allows to:

1. The use of Comments lines.

2. The use of the “$_” in a “Select-Object“.

3. Allows the use of the “`” tick which identify a line continuation.

4. A “Pause” is included after executing each line or block of code.

Simple to load as a function, then execute:

PS C:\> .  .\YourScriptFolder\Show-PSDemo_function.ps1

PS C:\> Show-PSDemo  -FileLocation C:\YourScriptFolder\MyDemoScript.ps1

It works in both PowerShell Console and PowerShell ISE editor.

Enjoy!!