Update Web Config through PowerShell

Hi,

There was a requirement of updating our timer job config with the below values in app settings section.

Post that we are picking the values from our web part.

<add key="NucleusSiteURL" value="https://oabc.com/sites/Nucleus" />

    <add key="NucleusSalesWorkShopLibrary" value="SalesWorkShop" />

    <add key="NucleusWikiSiteURL" value="https://oabc.com/sites/Nucleus/WikiSite" />

    <add key="NucleusPagesLibrary" value="Pages" />

    <add key="NucleusRFIRFPFAQ" value="RFI / RFP FAQs" />

Now for these entries we had created the below PowerShell script

if ((Get-PSSnapin -Name Microsoft.SharePoint.Powershell -ErrorAction SilentlyContinue) -eq $null )

{

            Add-PSSnapin Microsoft.SharePoint.Powershell

}

Write-Host "Entered???"

$WebAppConfigPath = "C:\inetpub\wwwroot\wss\VirtualDirectories\80\web.config"

Write-Host "Loading Web.Config as XML in " $WebAppConfigPath -ForegroundColor Cyan

[xml]$xml = Get-Content $WebAppConfigPath

Write-Host "Started" -ForegroundColor Green

$appSettingNode =$xml.SelectSingleNode("//configuration/appSettings")

if ($appSettingNode -eq $null)

    {

    Write-Host "Inside if loop" -ForegroundColor Green

                $addAppsettingNode=$xml.CreateNode('element',"appSettings","")

    $appSettingNode=$xml.SelectSingleNode("//configuration").AppendChild($addAppsettingNode)

    #$addAppsettingNode=$xml.SelectSingleNode("//configuration").AppendChild($addAppsetting)

    }

    else

    {

     Write-Host "Inside else loop" -ForegroundColor Green

    #$appSettingNode=$xml.SelectSingleNode("//configuration/appSettings").AppendChild($addAppsetting)

    }

$config1=$xml.CreateNode('element',"add","")

$config1.SetAttribute('key','NucleusSiteURL')

$config1.SetAttribute('value','https://oabc.com/sites/Nucleus')

$config2=$xml.CreateNode('element',"add","")

$config2.SetAttribute('key','NucleusSalesWorkShopLibrary')

$config2.SetAttribute('value','SalesWorkShop')

$config3=$xml.CreateNode('element',"add","")

$config3.SetAttribute('key','NucleusWikiSiteURL')

$config3.SetAttribute('value','https://oabc.com/sites/Nucleus/WikiSite')

$config4=$xml.CreateNode('element',"add","")

$config4.SetAttribute('key','NucleusPagesLibrary')

$config4.SetAttribute('value','Pages')

$config5=$xml.CreateNode('element',"add","")

$config5.SetAttribute('key','NucleusRFIRFPFAQ')

$config5.SetAttribute('value','RFI / RFP FAQs')

$appSettingNode.AppendChild($config1)

$appSettingNode.AppendChild($config2)

$appSettingNode.AppendChild($config3)

$appSettingNode.AppendChild($config4)

$appSettingNode.AppendChild($config5)

$xml.Save($WebAppConfigPath)

Write-Host "Completed" -ForegroundColor Green

Finally it is inserting the values as below