I have a powershell script where I have to enable or disable task. In the script following thing I'm doing
read the $TaskPath = '\Microsoft\Windows\PowerShell\ScheduledJobs'
Get-ScheduledTask via $TaskPath
Get-ScheduledJob
Now in my project we have many different schedule task which is present in different path like few present at '\Microsoft\Windows\PowerShell\ScheduledJobs' and some task present at root path like '\printtask'.
Now when I pass the taskname to execute in the script and if that task is not present in the $TaskPath = '\Microsoft\Windows\PowerShell\ScheduledJobs' then it will not execute. To solve this issue I have to add another if condition for setting root path.
Lets say in the future if we have new task with some different path then I have to again add new if condition. To avoid that situation I am looking a way to have collection/list of task paths to check, Then we go through that collection/list and find the scheduled job and execute.
If in the future we need to add new task with other path, we can just add that task path to that collection/list and avoid having additional if statement.
Anyone has any suggestion how I can archive this..?
You can store all the TaskPaths in your initial logic by building an array of objects and add all of your Task Paths in there, somewhat like this:
$TaskPathList = #()
$TaskPathList += New-Object -TypeName PSObject -Property #{TaskPath = $TaskPath1;}
$TaskPathList += New-Object -TypeName PSObject -Property #{TaskPath = $TaskPath2;}
Later on, you can iterate through this collection of TaskPaths to read them do the decision making accordingly:
$TaskPathList | ForEach-Object {
if(<Place your condition to check against $_.TaskPath >)
{
#Do your stuff
}
}
Related
I am creating a PowerShell GUI that uses a link label. My code for this link is
$ExLinkLabel = New-Object System.Windows.Forms.LinkLabel
$ExLinkLabel.Location = New-Object System.Drawing.Size(15,130)
$ExLinkLabel.Size = New-Object System.Drawing.Size(150,20)
$ExLinkLabel.LinkColor = "BLUE"
$ExLinkLabel.ActiveLinkColor = "RED"
$ExLinkLabel.Text = "Link Example"
$ExLinkLabel.add_Click({[system.Diagnostics.Process]::start("https://google.com")})
$Form.Controls.Add($ExLinkLabel)
Now say I want to change it another website later in the code based on certain conditions, I tried doing this:
$ExLinkLabel.add_Click({[system.Diagnostics.Process]::start("https://yahoo.com")})
The problem that this now has two links open, both google and then yahoo.
Is there a way to clear or just replace that first link with my new one?
Thank you
Adding an event handler with an .add_<EventName>() method call does just that: It adds an additional event handler, of which there can be many.
In order to replace an event handler, you must first remove its old incarnation with .remove_<EventName>(), and then add the new incarnation with .add_<EventName>().
To that end, you must store the original incarnation in a variable that you can later pass to the .remove_EventName>() call:
# Define the original event handler, store it in a variable,
# and add it to the control.
$currEventHandler = { Start-Process https://google.com }
$ExLinkLabel.add_Click($currEventHandler)
# ...
# Remove the current event handler...
$ExLinkLabel.remove_Click($currEventHandler)
# ... and add the new one:
$currEventHandler = { Start-Process https://yahoo.com }
$ExLinkLabel.add_Click($currEventHandler)
Note that I've replaced [system.Diagnostics.Process]::start($url) with a simpler, PowerShell-idiomatic call to the Start-Process cmdlet.
In your simple case, where the two event handlers only differ by the URL they open, consider the alternative recommended by Theo:
Retain the original event handler and make it retrieve the URL to open from a variable defined outside the event handler, namely in the script scope. That way, all you need to do is to update the variable.
# Set the original URL
$url = 'https://google.com'
# Due to PowerShell's dynamic scoping, the event-handler script
# block - even though it runs in a *child* scope - sees the
# script scope's definition of variable $url
# You can make this cross-scope access explicit by using $script:url
# (If you wanted to *update* the variable from inside the child
# scope $script:url *must* be used.)
$ExLinkLabel.add_Click({ Start-Process $url })
# ...
# Update the variable, after which the event handler will
# use the new URL.
$url = 'https://yahoo.com'
I am trying to create a powershell 'AccessObject' comobject for my MS Access app. Basically, I will trying to create a powershell script that gets queries in a database and the tables and/or queries a particular query depends on. To do that i will need to have an instance of the MS Access 'AccessObject' and 'DependencyInfo' classes in my powershell script. I have attached a snippet of the function i intend to use. This is not the complete function, please note. All i want is to know how to create an instance of the DependencyInfo and AccessObjects in powershell.
function getQueries([string] $database)
{
$dbEng = New-Object -ComObject DAO.DBEngine.120
$AccessApp= New-Object -ComObject Access.Application
$Dependency = $AccessApp.DependencyInfo
$AccessObject=$AccessApp.AccessObjects
...
}
All i want is to know how to create an instance of the DependencyInfo
and AccessObjects in powershell.
The following creates a new Access process, opens a local accdb file, and retrieves the dependencies for a given form:
$db = new-object -ComObject 'Access.Application'
$db.OpenCurrentDatabase('C:\temp\deezNutz.accdb')
$dependency_info = $db.Application.CurrentProject().AllForms('frm_person').GetDependencyInfo()
foreach ($dependency in $dependency_info.Dependencies) { $dependency.FullName }
$db.CloseCurrentDatabase()
$db.Application.DoCmd.Quit()
If you're trying to pro grammatically manipulate the objects in a Microsoft Access database e.g., forms, reports, queries, etc. Your best bet is to search for solutions using VBA then convert those to Powershell. For this example, I first wrote the solution in VBA then converted it to Powershell.
Thanks #Lord Adam. This was really helpful. In my case i had to modify the logic a little bit:
$AccessApp= New-Object -ComObject 'Access.Application'
$AccessApp.OpenCurrentDatabase($database)
$AccessApp.Application.SetOption("Track Name AutoCorrect Info", $true)
$QryDependency = $AccessApp.Application.CurrentData.AllQueries.Item($query.Name).GetDependencyInfo()
ForEach($di in $QryDependency.Dependencies)
{
$QryObjects= $QryObjects + $di.Name +","
}
I have an Installshield project that uses powershell custom actions.
In one of my dialogs, I'm asking from the user to enter username and password, then I validate the credentials (with powershell) and I want to enable the Next button only if the credentials were correct.
Can this be achieved with powershell action item? The reason I'm using powershell is that I don't know InstallScript at all.
Here is my powershell script so far:
Function Test-UserCredential {
Param($username, $password)
Add-Type -AssemblyName System.DirectoryServices.AccountManagement
$ct = [System.DirectoryServices.AccountManagement.ContextType]::Machine, $env:computername
$opt = [System.DirectoryServices.AccountManagement.ContextOptions]::SimpleBind
$pc = New-Object System.DirectoryServices.AccountManagement.PrincipalContext -ArgumentList $ct
$Result = $pc.ValidateCredentials($username, $password).ToString()
$Result
}
$comp_username = Get-Property -Name COMPUTER_USERNAME
$comp_password = Get-Property -Name COMPUTER_PASSWORD
$result = Test-UserCredential -username $comp_username -password $comp_password
if ($result)
{
#Enable "Next" button
}
else
{
#Disable "Next" button
}
Thanks.
There are three things you will have to do.
Choose a property that tracks whether the Next button should be enabled, and set that from your PowerShell. Typically you will set it to "1" or "" (empty string) for ease in the next step.
Create Control Conditions in the dialog editor that Enable and Disable the Next button referencing the property as your condition.
Separately trigger the UI to update after the powershell action completes. Unfortunately the UI does not evaluate control conditions after all property changes; it only does so after it changes a property it thinks is related. So the easiest way to do this is to add a Set Property control event that sets the property.
Note that for clarity of step 3's relevance, it can be useful to split this into two separate properties; set one in the powershell, reflect that into another in the Set Property control event, and have control conditions that read the latter.
I've created a a FileSystemWatcher object that I have events registered for. I intend that this script will run an execute mocha in the same directory. I can execute mocha from the script using:
$testProgram = "mocha"
& $testProgam
I get the results..
...
3 test complete....
Now when I take this same code and wrap it in the event like this...
$changed = Register-ObjectEvent $watcher "Changed" -Action {
clear
write-host "Running Test Scripts.........."
write-host "Changed: $($eventArgs.FullPath)"
& testProgram
}
I get this...
Running Test Scripts.......................
Changed: C:\files\main.js
Where are the results of the & testProgram?
I don't have PS to test this atm, so please correct me if I'm wrong. I can think of multiple problems that you could check out:
You got a typo. In your action block, testProgram is missing a dollar-sign in front.
I'm pretty sure that an ObjectEvent runs the action block in a seperate scope where you can't get the parameters from your script. You could try to use e.g. $global:testProgram.
Relative paths may not work here. You might need absolute path to the "mocha" executable or what it is.
EDIT: I found a solution you can try for the possible scope-problem (reaching the testprogram variable inside your action block). Shay Levi posted this code sample on Technet. It uses the -MessageData parameter to pass input into your action-block. Here's his codesample:
#Use the -MessageData parameter:
Register-ObjectEvent ... -MessageData $foo
#Access the variable from within the action block
$event.MessageData
I would like to leverage the following
$wi=new-object -com WindowsInstaller.Installer
If I do a $wi |gm I do not see the method I want "Products".
I would like to iterate Products and show a list of all items installed on the system.
So I thought... let me do a $wi.gettype().invokemember
Not really sure what to do $wi.gettype().invokemember("Products","InvokeMethod")
or something yields cannot find an overload...
But now I am lost. I have looked elsewhere but I don't want to create a whole XML file. I should be able to access the com objects methods.
If you are trying to get a list of installed programs in Windows, there is a native Powershell way, which is actually using WMI behind the scenes:
Get-WmiObject Win32_Product
Here's a related article from Microsoft Scripting Guys.
It appears that this approach has some issues, so better be avoided.
When you query this class, the way the provider works is that it
actually performs a Windows Installer “reconfiguration” on every MSI
package on the system as its performing the query!
I tried my best to find a solution that involves WindowsInstaller com object, but all of them point to an article that no longer exists. Here is one on stackoverflow.
An alternative solution is to give a try to psmsi on CodePlex.
Here my code-snippet for this:
cls
$msi = New-Object -ComObject WindowsInstaller.Installer
$prodList = foreach ($p in $msi.Products()) {
try {
$name = $msi.ProductInfo($p, 'ProductName')
$ver = $msi.ProductInfo($p, 'VersionString')
$guid = $p
[tuple]::Create($name, $ver, $guid)
} catch {}
}
$prodlist