switch in PowerShell is like a less convoluted if elseif statement, but else doesn't work. Is there anything else I can do?
switch ("test") {
"1" {"2"}
"2" {"1"}
} else {"other"}
gives error
else : The term 'else' is not recognized as the name of a cmdlet, function, script file, or operable program. Check
the spelling of the name, or if a path was included, verify that the path is correct and try again.
At line:4 char:3
+ } else {"other"}
+ ~~~~
+ CategoryInfo : ObjectNotFound: (else:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException
The else for switches is the default option:
switch ("test") {
"1" {"2"}
"2" {"1"}
Default {"other"}
}
You're looking for default {...}
For example:
https://adamtheautomator.com/powershell-switch/
$num = Read-Host "Enter a number"
Switch ($num)
{
1 {'Run Action 1'}
2 {'Run Action 2'}
3 {'Run Action 3'}
default {'No Action'}
}
Related
When i tried to run the program for the first time, it crashes and this is what i got. im sure that i've installed mono sdk
PS D:\Microsoft VS Code\Projects\New Projects> cd "d:\Microsoft VS Code\Projects\New Projects\" ; if ($?) { mcs Program.cs -out:Program } ; if ($?) { mono Program }
mcs : The term 'mcs' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the
path is correct and try again.
At line:1 char:62
+ ... "d:\Microsoft VS Code\Projects\New Projects\" ; if ($?) { mcs Program ...
+ ~~~
+ CategoryInfo : ObjectNotFound: (mcs:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException**strong text**
I'm trying to search a webpage for a word "Green". It tells me things are fine but if it finds "Red" it tells me things are bad. What I've done below is very simple but I'm thinking its enough to ask the question.
$web = Invoke-WebRequest http://myip/vrsinfo/aghealth/DISTAGAR
$web.ToString() -split "[`r`n]" | Select-String "Green"
Here is what it returns
name="agSolarwindsHealth" value=Green readonly>
Here is what I've tried so far
if (name="agSolarwindsHealth" value=Green readonly>) {
'This number is 1'
} else {
'This number is not 1'
}
Error
name=agSolarwindsHealth : The term 'name=agSolarwindsHealth' is not recognized
as the name of a cmdlet, function, script file, or operable program. Check the
spelling of the name, or if a path was included, verify that the path is correct
and try again.
At line:3 char:5
+ if (name="agSolarwindsHealth" value=Green readonly>)
+ ~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : ObjectNotFound: (name=agSolarwindsHealth:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException
I am very new to powershell scripting. Trying to learn it from web. Now I am trying to do a script and facing some problem, so need some help ans suggestions from you people. I am giving description what I tried to do:
first of all I have declared 2 variables, then I used if statement to see if the variables are empty then it will show a warning message and it will ask for the inputs from the user and after that it will show the value of the variables. but it is giving some errors.
$workingdirectory = args[0]
$directoryname = args[1]
if ("$WorkingDirectory" -eq "")
{
Write-Warning "Parameter Required"
$WorkingDirectory = Read-Host "Enter the absolute path to working directory "
}
if ("$DirectoryName" -eq "")
{
Write-Warning "Paramater Required"
$DirectoryName = Read-Host "Enter a directory name to search for in $WorkingDirectory "
}
Write-Host "$WorkingDIrectory"
write-host "$DirectoryName"
When I run it, it is showing the following errors:
ARGS[0] : The term 'ARGS[0]' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the
name, or if a path was included, verify that the path is correct and try again.
At C:\LAB_5-submission\mmbillah1_Lab_testdir.ps1:24 char:21
+ $WorkingDirectory = ARGS[0]
+ ~~~~~~~
+ CategoryInfo : ObjectNotFound: (ARGS[0]:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException
ARGS[1] : The term 'ARGS[1]' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the
name, or if a path was included, verify that the path is correct and try again.
At C:\LAB_5-submission\mmbillah1_Lab_testdir.ps1:25 char:18
+ $DirectoryName = ARGS[1]
+ ~~~~~~~
+ CategoryInfo : ObjectNotFound: (ARGS[1]:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException
I want to run like this: .\scriptname.ps1, if I use this then it will show the warning and ask for the two variables input.
and if I run this .\scriptname.ps1 C:\users\masum then it will ask for the second variable value only.
The root of your problem is simply syntax it should be $args[0] and $args[1] if you intend to use what you have now. What I would strongly suggest instead is to create parameters for your script, and then test if those parameters are valid, and if they aren't to prompt for them.
Parameters can be defined in a Param() block as such:
Param(
$workingdirectory,
$directoryname
)
That is very simple, but for your needs it works. You can add types to make sure the right kinds of things are passed as the parameter, and add tests to make sure the parameters are valid, but that goes beyond what we're doing here.
Then you would check to make sure that there is a value for each, and I would recommend making sure that the path is valid. Something like:
While([string]::IsNullOrEmpty($workingdirectory) -or !(Test-Path $workingdirectory)){
$workingdirectory = Read-Host "Enter a valid working directory"
}
That checks if the $workingdirectory variable is empty or just blank spaces, and if it actually has a value it will check to make sure it's a valid directory. If it is blank or the path isn't valid it prompts the user to enter a valid path. You would need to repeat that for the $directoryname variable.
So you would end up with something like:
Param(
$workingdirectory,
$directoryname
)
While([string]::IsNullOrEmpty($workingdirectory) -or !(Test-Path $workingdirectory)){
$workingdirectory = Read-Host "Enter a valid working directory"
}
While([string]::IsNullOrEmpty($directoryname) -or !(Test-Path $directoryname)){
$directoryname= Read-Host "Enter a valid target directory"
}
Write-Host $workingdirectory
Write-Host $directoryname
Question:
Is it possible to set an alias that calls both a function and a switch?
Here is an example I am working with.
Set-Alias -Name myidea -Value 'Test-FunctionIdea -SwitchIdea'
function Test-FunctionIdea {
param(
[switch]$SwitchIdea
)
if($SwitchIdea)
{
Write-Host 'Good Idea'
}
}
Here is the error I am having:
myidea : The term 'Test-FunctionIdea -SwitchIdea' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if
a path was included, verify that the path is correct and try again.
At line:1 char:1
+ myidea
+ ~~~~~~
+ CategoryInfo : ObjectNotFound: (Test-FunctionIdea -SwitchIdea:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException
If it is possible please let me know how it's done. I've searched the internet for this and came up with no results.
You can check $MyInvocation.InvocationName and adjust the parameters inside the function:
function Some-Function([switch] $foo) {
if ($MyInvocation.InvocationName -eq 'foo') { $foo = $true }
}
Set-Alias foo Some-Function
The [usually negligible] advantage is that it doesn't create an additional execution context for the new function scope.
I want to write a powershell script that takes in params and uses functions.
I tried this:
param
(
$arg
)
Func $arg;
function Func($arg)
{
Write-Output $arg;
}
but I got this:
The term 'Func' is not recognized as the name
of a cmdlet, function, script file, or operable program.
Check the spelling of the name, or if a path was included,
verify that the path is correct and try again.
At func.ps1:6 char:5
+ Func <<<< $arg;
+ CategoryInfo : ObjectNotFound: (Func:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException
Fine, I thought. I'll try this instead:
function Func($arg)
{
Write-Output $arg;
}
param
(
$arg
)
Func $arg;
But then, I got this:
The term 'param' is not recognized as the name
of a cmdlet, function, script file, or operable program.
Check the spelling of the name, or if a path was included,
verify that the path is correct and try again.
At C:\Users\akina\Documents\Work\ADDC\func.ps1:7 char:10
+ param <<<<
+ CategoryInfo : ObjectNotFound: (param:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException
Is what I'm asking for doable? Or am I being unreasonable in my request?
The param block in a script has to be the first non-comment code. After that, you need to define the function before you invoke it e.g.:
param
(
$arg
)
function Func($arg)
{
$arg
}
Func $arg
The Write-Output is unnecessary in your example since the default behavior is to output objects to the output stream.
All you need ius to make sure PARAM is first string of your script.
You can put the param tag inside the function..
Something like this:
function func($avg)
{
param
(
$avg
)
}