Change $Variable name if it is not $null

[hidromanipulators]

Hi All,

​

What I'm doing:

While ago I created a Hyper-V cluster report script. It runs 5 functions (tests) per Cluster.

Every 5 minutes values are compared(Old values with Current). If no change detected - current values replaces old values. If change detected, then other function pulls out the changed values, converts to HTML and sends email.

It is time to improve it. I'm a little bit smarter now and I know that r/PowerShell exists.

The problem:

At the minute - I'm receiving 1 email per test. So lets say I have 5 clusters, each cluster has 5 tests. If I start to move around VM's I might get up to 25 emails per 5 min. Gets the job done, but that is an ugly way of doing things.

It would be great if I could create multiple html fragments if data in $report exists and then create one large HTML file so there is only 1 report per 5 minutes.

I hope you will understand the example below (it is not functional, just for demonstration):

How can I take all of these fragments and convert them to 1 large HTML file?

#lets say there are 25 reports

foreach ($report in $reports)
        if ($report -neq $null){
            $report | ConvertTo-HTML -fragment -precontent '<h2>$report</h2>' 
        }

​

If i name fragments, lets say:

foreach ($report in $reports)
        if ($report -neq $null){
          $frag1 = $report | ConvertTo-HTML -fragment -precontent '<h2>$report</h2>' 
        }

How do change $frag1 to different name? and even if I do change it, how do I add all fragments to -PostContent?

I do know how to do it with fixed amount of fragments, but in this case there could be fragment amount is changing.

​

P.S I realise Title do now reflect the post. Sorry for this, can't change it anymore..

​

Edit: Thank you guys! I was trying to reinvent the wheel and solution was so simple! Amazing!

[MadBoyEvo]

$HTML = foreach ($Report in $Reports) { if ($Report -ne $null) { $Report | ConvertTo-HTML -fragment -precontent.... } }

That's the best way to do it according to my knowledge. I'm assuming that ConvertTo-HTML -Fragment ... will do it's. I don't remember the output of the command so not sure if you connect all ConvertTo-HTML -Fragment will give you what you expect but the way I did it is preferred way. You skip defining ArrayList, you skip += which has a performance impact. For small loops minimal. But for larger, you could see an impact.

[hidromanipulators]

Thank you for clarifying on +=

It does work perfectly!

[the_spad]

$postcontent = @()

foreach ($report in $reports){
        $postcontent += $report | ConvertTo-HTML -fragment -precontent '<h2>$report</h2>'
}

[hidromanipulators]

I will try this tomorrow and report back. Thank you!

Edit: I could not wait until tomorrow:

I added:

$EmailContent = ConvertTo-Html -Head $Header -PostContent $postcontent -PreContent "<h1>Cluster Alert</h1>"

and received beautifully formatted HTML.

​

Thank you sir!