After revisiting my post I realized it was pretty much wrong and completely useless. So, I set about to rewrite it with the help of a few folks on the forums.
function Add-WebConfigAppSetting
{
[CmdletBinding()]
param (
[Parameter(
Mandatory = $true
)]
[ String ]
[ValidateNotNullOrEmpty()]
$Key ,
[Parameter(
Mandatory = $true
)]
[ String ]
[ValidateNotNullOrEmpty()]
$Value ,
[Parameter(
Mandatory = $true
)]
[ String ]
[ValidateNotNullOrEmpty()]
$WebConfigPath
)
# Configure function variables
$timestamp = ( Get-Date -Format yyyyMMddHHmmss )
# Clear variables to prevent reuse
$appSettings = $node = $xml = $null
# Output status to host
Write-Output "Loading file contents."
# Load content of web.config
$xml = [ xml ](get-content( $webconfigpath ))
# Backup web.config
if ( -not ( Test-Path "$webconfigpath.$timestamp" ))
{
# Output status to host
Write-Output "Creating backup."
# Save file
$xml .Save( "$webconfigpath.$timestamp" )
}
# If appSettings element does not exist
if ( $xml .SelectSingleNode( //configuration/appSettings ) -eq $null )
{
# Output status to host
Write-Output The appSettings node does not exist. Adding it now.
# if child nodes do not exist create it
$appSettings = $xml .CreateElement( "appSettings" )
# Output status to host
Write-Output "The appSetting ($($key)/$($value)) does not exist. Adding it now."
# add new element called add to //configuration/appSettings
$node = $xml .CreateNode( element , add , )
# Set attributes for new appSetting
$node .SetAttribute( key , $key )
$node .SetAttribute( value , $value )
# Add $node to //configruation/appsetting element
[ Void ] $appSettings .AppendChild( $node )
# Add $appSetting node to //configuration element
[ Void ] $xml .configuration.AppendChild( $appSettings )
# Output status to host
Write-Output "Saving changes."
# Save changes to file
$xml .Save( $webconfigpath )
}
else
{
# Output status to host
Write-Output "The //configuration/appSettings element exists. Checking for children nodes."
# Gather //configuration/appSettings data
$appSettings = $xml .configuration[ appSettings ]
# Test to see if element has child nodes
if ( $appSettings .HasChildNodes)
{
# Output status to host
Write-Output "The appSettings elements has children. Checking arguments against existing values."
# Test to see if key exists.
if ( $appSetting = ( $appSettings .ChildNodes | Where { $_ .key -eq $key }))
{
# Output status to host
Write-Output "The element ($($key)) exists. Comparing values."
# Test to see if value matches
if ( $appSetting .value -eq $value )
{
# Value matches. Output status to host.
Write-Output "The key/value arguments are already set correctly."
}
else
{
# Value does not match. Attempt to update and output status to host.
&
