Iterate through an array of powershell custom objects and output to html - powershell

Question

I have an array :
$results =#()
Then i loop with custom logic through wmi and create custom objects that i add to the array like this:
$item= #{}
$item.freePercent = $freePercent
$item.freeGB = $freeGB
$item.system = $system
$item.disk = $disk
$results += $item
I know want to to some stuff on the results array, like converting to html .
I can do it with a foreach and custom html writing but i want to use convertto-html...
P.S. I can print out data like this but only this:.
foreach($result in $results) {
$result.freeGB
}

Answer 1

Custom object creation doesn't work like you seem to think. The code
$item= #{}
$item.freePercent = $freePercent
$item.freeGB = $freeGB
$item.system = $system
$item.disk = $disk
creates a hashtable, not a custom object, so you're building a list of hashtables.
Demonstration:
PS C:\> $results = #()
PS C:\> 1..3 | % {
>> $item = #{}
>> $item.A = $_ + 2
>> $item.B = $_ - 5
>> $results += $item
>> }
>>
PS C:\> $results
Name Value
---- -----
A 3
B -4
A 4
B -3
A 5
B -2
PS C:\> $results[0]
Name Value
---- -----
A 3
B -4
Change your object creation to this:
$item = New-Object -Type PSCustomObject -Property #{
'freePercent' = $freePercent
'freeGB' = $freeGB
'system' = $system
'disk' = $disk
}
$results += $item
so you get the desired list of objects:
PS C:\> $results = #()
PS C:\> 1..3 | % {
>> $item = New-Object -Type PSCustomObject -Property #{
>> 'A' = $_ + 2
>> 'B' = $_ - 5
>> v}
>> $results += $item
>> }
>>
PS C:\> $results
A B
- -
3 -4
4 -3
5 -2
PS C:\> $results[0]
A B
- -
3 -4
Also, appending to an array in a loop is bound to perform poorly. It's better to just "echo" the objects inside the loop and assign the result to the list variable:
$results = foreach (...) {
New-Object -Type PSCustomObject -Property #{
'freePercent' = $freePercent
'freeGB' = $freeGB
'system' = $system
'disk' = $disk
}
}
Pipe $results into ConvertTo-Html to convert the list to an HTML page (use the parameter -Fragment if you want to create just an HTML table instead of an entire HTML page).
$results | ConvertTo-Html
An even better approach would be to pipeline your whole processing like this:
... | ForEach-Object {
New-Object -Type PSCustomObject -Property #{
'freePercent' = $freePercent
'freeGB' = $freeGB
'system' = $system
'disk' = $disk
}
} | ConvertTo-Html

Answer 2

You aren't creating a custom object, you're creating a hash table.
Assuming you've got at least V3:
[PSCustomObject]#{
freePercent = $freePercent
freeGB = $freeGB
system = $system
disk = $disk
}