PowerShell read column value from csv file [duplicate] - powershell

Question

This question already has answers here:
How can you use an object's property in a double-quoted string?
(5 answers)
Closed 1 year ago.
This is my below input data which is in CSV format and roles,admin, accountant and security are columns.
roles, admin,accountant,security
Engineer, ,x , ,
I want to get value of rows using columns with below code, example , foreach for accountant column should return 'x', but I am getting something else.
$path = "$PSScriptRoot\Test.csv"
$csv = Import-Csv -path $path -Delimiter ","
$columns = $csv | Get-member -MemberType 'NoteProperty' | Select-Object -ExpandProperty 'Name'
$csv | ForEach-Object {
$row = $_
foreach ($col in $columns) {
Write-Host " vaalue of scripting is : $col "
Write-Host " vaalue of scripting row is : $row.$col "
Start-Sleep -s 10
}
}
Output I get is
vaalue of scripting is : accountant
vaalue of scripting row is : #{roles=Engineer; admin=; accountant=x ; security=}.accountant
vaalue of scripting is : admin
vaalue of scripting row is : #{roles=Engineer; admin=; accountant=x ; security=}.admin
vaalue of scripting is : roles
vaalue of scripting row is : #{roles=Engineer; admin=; accountant=x ; security=}.roles
How can I get 'x' for accountant column or any other column value using

Answer 1

Following from my comment, short answer was to use the Subexpression operator $( ), which would allow PowerShell to reference the property $col of the object $row.
Short extract from MS Docs:
Use this when you want to use an expression within another expression. For example, to embed the results of command in a string expression.
To give you a short explanation of why this is needed, using this as an example:
$object = [pscustomobject]#{
foo = 'var'
}
$property = 'foo'
When we do "$object.$property" or in simple terms, "$object.foo", the double quotes "..." are not allowing PowerShell to reference the foo property from $object because the dot . is interpreted as literal and not as a dot method. In addition, the quotes are converting $object to its stringified ? representation #{foo=var} followed by the literal dot . followed by the variable expansion of $property.
Another extract from about_Properties:
The most common way to get the values of the properties of an object is to use the dot method. Type a reference to the object, such as a variable that contains the object, or a command that gets the object. Then, type a dot (.) followed by the property name.
Lastly, what other alternatives do we have to get around this besides $(...):
String Formatting and String.Format method:
'Value of $object.$property is "{0}".' -f $object.$property
[string]::Format('Value of $object.$property is "{0}".', $object.$property)
Using + to concatenate strings is also a very known one:
'Value of $object.$property is "' + $object.$property + '".'
As a side note, and unrelated to the actual issue, this might be a more direct way of approaching your code:
#'
roles,admin,accountant,security
Engineer,,x,,
Operator,,y,,
'# |
ConvertFrom-Csv | ForEach-Object -Begin { $i = 1 } -Process {
foreach($Property in $_.PSObject.Properties.Name)
{
'Value of Row {0} Column "{1}" is "{2}"' -f
$i, $Property, (
'NULL', ($val = $_.$Property)
)[[int][bool]$val]
}
$i++
}
Note the use of .PSObject to access the object's properties and methods, an alternative to Get-Member.
The above would result in:
Value of Row 1 Column "roles" is "Engineer"
Value of Row 1 Column "admin" is "NULL"
Value of Row 1 Column "accountant" is "x"
Value of Row 1 Column "security" is "NULL"
Value of Row 2 Column "roles" is "Operator"
Value of Row 2 Column "admin" is "NULL"
Value of Row 2 Column "accountant" is "y"
Value of Row 2 Column "security" is "NULL"

Answer 2

I wrote this based on your csv file, let me know if it worked (change the folder path and file name).
$folderspath = 'C:\Test'
$csvfilename = 'info.csv'
$csvfilepath = $folderspath + "\" + $csvfilename
$csvfilepath = $csvfilepath.ToString()
$csvfile = Import-CSV -Path $csvfilepath -Delimiter ","
ForEach ($row in $csvfile) {
IF($row.security -eq "High") {
$Roles = $row.roles
$Admin = $row."admin"
$Accountant = $row.accountant
$Security = $row."security"
Write-Host "Roles: " $Roles "; Admin:" $Admin "; Accountant:" $Accountant "; `
Security:" $Security
}
}
The csv file I used
roles, admin,accountant,security
Engineer, ,x , ,
Engineer2,Yes ,x ,High,
Engineer3, No, , Low,