PowerShell V2 高级函数使用举例（02）

shuijingping

　　Function Set-WUAutoUpdateSetting
　　{
　　[CmdletBinding(SupportsShouldProcess=$true,ConfirmImpact="High")]
　　Param
　　(
　　[Parameter(Mandatory=$false,Position=0)][Boolean]$FeaturedUpdatesEnabled,
　　[Parameter(Mandatory=$false,Position=1)][Boolean]$IncludeRecommendedUpdates,
　　[Parameter(Mandatory=$false,Position=2)][Boolean]$NonAdministratorsElevated,
　　[Parameter(Mandatory=$false,Position=3)][ValidateRange(0,4)][INT]$NotificationLevel
　　)
　　DynamicParam
　　{
　　if ($NotificationLevel -eq 4) {
　　#Define dynamic parameter ScheduledInstallationDay
　　$paramDictionary = New-Object System.Management.Automation.RuntimeDefinedParameterDictionary
　　$validateRange1 = New-Object System.Management.Automation.ValidateRangeAttribute(0,7)
　　$paraAttributes1 = New-Object System.Management.Automation.ParameterAttribute
　　$paraAttributes1.Mandatory = $false
　　$paraAttributes1.Position = 4
　　$attributeCollection1 = new-object -Type System.Collections.ObjectModel.Collection``1[System.Attribute]
　　$attributeCollection1.Add($paraAttributes1)
　　$dyParam1 = New-Object System.Management.Automation.RuntimeDefinedParameter("ScheduledInstallationDay",[INT],$attributeCollection1)
　　$dyParam1.Attributes.Add($attrCol1)
　　$dyParam1.Attributes.Add($validateRange1)
　　$paramDictionary.Add("ScheduledInstallationDay",$dyParam1)
　　#Define dynamic parameter ScheduledInstallationTime
　　$validateRange2 = New-Object System.Management.Automation.ValidateRangeAttribute(0,23)
　　$paraAttributes2 = New-Object System.Management.Automation.ParameterAttribute
　　$paraAttributes2.Mandatory = $false
　　$paraAttributes2.Position = 5
　　$attributeCollection2 = new-object -Type System.Collections.ObjectModel.Collection``1[System.Attribute]
　　$attributeCollection2.Add($paraAttributes2)
　　$dyParam2 = New-Object System.Management.Automation.RuntimeDefinedParameter("ScheduledInstallationTime",[INT],$attributeCollection2)
　　$dyParam2.Attributes.Add($attrCol2)
　　$dyParam2.Attributes.Add($validateRange2)
　　$paramDictionary.Add("ScheduledInstallationTime",$dyParam2)
　　return $paramDictionary
　　}
　　}
　　Process
　　{
　　$params = $pscmdlet.MyInvocation.BoundParameters
　　foreach ($commonParameter in $commonParameters)  {
　　if ($params.ContainsKey($commonParameter)) {
　　$params.Remove($commonParameter) | Out-Null
　　}
　　}
　　if (-not $(Test-Privilege)) {
　　$customError = New-CustomErrorRecord `
　　-ExceptionString "Please run Set-WUAutoUpdateSetting under administrator's privilege." `
　　-ErrorID "Error" -ErrorCategory "NotSpecified" `
　　-TargetObject $pscmdlet
　　$pscmdlet.ThrowTerminatingError($customError)
　　}
　　if ($params.Count -eq 0) {
　　$customError = New-CustomErrorRecord `
　　-ExceptionString "Set-WUAutoUpdateSetting failed. Please specify at least one parameter." `
　　-ErrorID "Error" -ErrorCategory "NotSpecified" `
　　-TargetObject $pscmdlet
　　$pscmdlet.ThrowTerminatingError($customError)
　　} else {
　　$serviceEnabled = (Get-WUAutoUpdateSetting).ServiceEnabled
　　if ($serviceEnabled) {
　　foreach ($param in $params.GetEnumerator())   {
　　$propertyName = $param.Key
　　$propertyValue = $param.Value
　　$muAU.Settings.$propertyName = $propertyValue
　　Try
　　{
　　$returnWithError = $false
　　if ($pscmdlet.ShouldProcess($propertyName))   {
　　$muAU.Settings.Save()
　　}
　　}
　　Catch
　　{
　　$returnWithError = $true
　　}
　　Finally
　　{
　　if (-not $returnWithError) {
　　switch ($propertyName) {
　　"NotificationLevel" {
　　$propertyValue = $HTNotificationLevel[$propertyValue]
　　$pscmdlet.WriteVerbose("Succeeded to change the setting $propertyName to $propertyValue.")
　　}
　　"ScheduledInstallationDay" {
　　$propertyValue = $HTScheduledInstallationDay[$propertyValue]
　　$pscmdlet.WriteVerbose("Succeeded to change the setting $propertyName to $propertyValue.")
　　}
　　"ScheduledInstallationTime" {
　　$propertyValue = $propertyValue.ToString() + ":00"
　　$pscmdlet.WriteVerbose("Succeeded to change the setting $propertyName to $propertyValue.")
　　}
　　Default {
　　$pscmdlet.WriteVerbose("Succeeded to change the setting $propertyName to $propertyValue.")
　　}
　　}
　　} else {
　　$customError = New-CustomErrorRecord `
　　-ExceptionString "Failed to change the setting $propertyName to $propertyValue." `
　　-ErrorID "UnknownError" -ErrorCategory "NotSpecified" `
　　-TargetObject $pscmdlet
　　$pscmdlet.WriteError($customError)
　　}
　　}
　　}
　　} else {
　　$customError = New-CustomErrorRecord `
　　-ExceptionString "Windows update service is disabled." `
　　-ErrorID "Error" -ErrorCategory "NotSpecified" `
　　-TargetObject $pscmdlet
　　$pscmdlet.ThrowTerminatingError($customError)
　　}
　　}
　　}
　　}