Remove-DuplicateWebparts.ps1

Remove-DuplicateWebparts.ps1

$ErrorActionPreference='stop'

function Remove-DuplicateWebparts
{
    param([System.String] $siteurl, [System.String] $filename)

    $site = new-object Microsoft.SharePoint.SPSite($siteurl)
    $items = $site.GetCatalog([Microsoft.SharePoint.SPListTemplateType]::MasterPageCatalog).Items
    $webParts = new-object 'System.Collections.Generic.List[string]'

    foreach ($item in $items)
    {
        if ($item.Name -eq $filename)
        {
            $wpm = $item.File.GetLimitedWebPartManager([System.Web.UI.WebControls.WebParts.PersonalizationScope]::Shared)
            while ($wpm.WebParts.Count -gt 0)
            {
                $sb = new-object System.Text.StringBuilder
                
                $xws = new-object System.Xml.XmlWriterSettings
                $xw = [System.Xml.XmlWriter]::Create($sb, $xws)
                $wp = $wpm.WebParts.Item[0]
                $wpm.ExportWebPart($wp, $xw)
                $xw.Flush()
                
                $data = [System.Security.Cryptography.MD5]::Create().ComputeHash([System.Text.Encoding.UTF8]::GetBytes($sb.ToString()))
                $sBuilder = new-object System.Text.StringBuilder
                for($i = 0; ($i -lt $data.Length); $i++) { $sBuilder.Append($data[$i].ToString("x2")) }
                $md5Hash = $sBuilder.ToString()
                
                if ($webParts.Contains($md5Hash))
                {
                    write-host '#$wpm.DeleteWebPart($wp)  $md5Hash==' $md5Hash
                    $wpm.DeleteWebPart($wp)
                }
                else
                {
                    write-host '$webParts.Add(' $md5Hash ')'
                    $webParts.Add($md5Hash)
                }

            }

        }

    }

    $site.Dispose()
}