function Set-RenderingDatasource {
    [CmdletBinding()]
    param(
        [ValidateNotNullOrEmpty()]
        [Item]$Page,

        [ValidateNotNullOrEmpty()]
        [Item]$Rendering,

        [string]$DatasourceId,

	[string]$Device = "Default",

        [switch]$Publish,

	[string]$PlaceHolder = $null
    )

    $deviceItem = Get-LayoutDevice $Device

    Write-Host "Set rendering datasource on page $($Page.FullPath) on rendering $($Rendering.Name):"

    $renderingInstance = Get-Rendering -Item $Page -Rendering $Rendering -Device $deviceItem -Placeholder $PlaceHolder

    if ($renderingInstance)
    {
        if ($renderingInstance.Datasource -eq $DatasourceId)
        {
            Write-Host "`tDatasource already set on $($Page.FullPath)" -ForegroundColor yellow
        }
        else
        {
            Write-Host "`tUpdating rendering datasource..."

            $renderingInstance.Datasource = $DatasourceId
            Set-Rendering -Item $Page -Instance $renderingInstance
            Write-Host "`tDone" -ForegroundColor green

            if ($Publish -eq $TRUE)
            {
                Write-Host "`tPublishing item..."
                Publish-Item $Page -PublishMode SingleItem
                Write-Host "`tDone" -ForegroundColor green
            }
        }
    }
    else
    {
        Write-Host "ERROR: Couldn't find rendering instance on $($Page.FullPath)" -ForegroundColor red -BackgroundColor white
    }
}