Powershell GUI, define variables per button - powershell

Question

Right now i write an gui for a simple filter script for completnes this is the whole script right now
[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Drawing")
[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms")
$objForm = New-Object System.Windows.Forms.Form
$objForm.StartPosition = "CenterScreen"
$objForm.Size = New-Object System.Drawing.Size(1200,800)
$objForm.Text = "Test GUI"
$form = New-Object System.Windows.Forms.Form
$form.Size = New-Object System.Drawing.Size(900,600)
$dataGridView = New-Object System.Windows.Forms.DataGridView
$dataGridView.Size=New-Object System.Drawing.Size(800,400)
#Filtern
$OKButton = New-Object System.Windows.Forms.Button
$OKButton.Location = New-Object System.Drawing.Size(30,10)
$OKButton.Size = New-Object System.Drawing.Size(300,92)
$OKButton.Text = "Filtern"
$OKButton.Name = "Filter"
$OKButton.DialogResult = [System.Windows.Forms.DialogResult]::None
$OKButton.Add_Click({$i= 0
$path = "C:\temp\smtpfilter\LNS5filter.txt"
$length = (Get-Content $path).Length
#Datum, Hostname und Message Nummer
$result = Get-Content $path | ForEach-Object {
if($_ -match '(\d{2}\.\d{2}\.\d{4} \d{2}:\d{2}:\d{2}).*\(((?:\d{1,3}\.){3}\d{1,3})\) disconnected\.?\s+(\d+) message\[s\]'){
try {
#$dns = [System.Net.Dns]::GetHostEntry($matches[2]).HostName
}
catch {
#$dns = 'Not available'
}
[PsCustomObject]#{
IP = $matches[2]
Messages = [int]$matches[3]
#DNSName = $dns
Date = [datetime]::ParseExact($matches[1], 'dd.MM.yyyy HH:mm:ss', $null)
}}
$i++
if($i % 1000 -eq 0){
Write-Progress -activity "Searching for matches" -status "Scanned: $i of $($length)" -percentComplete (($i / $length) * 100)
}}
Write-Progress -activity "Searching for matches" -status "Scanned: $i of $($length)" -percentComplete (($i / $length) * 100)
#Messages Counted
$cumulative = $result | Group-Object -Property IP | ForEach-Object {
[PsCustomObject]#{
IP = $_.Name
Messages = ($_.Group | Measure-Object -Property Messages -Sum).Sum
#DNSName = $_.Group[0].DNSName
Date = ($_.Group | Sort-Object Date)[-1].Date
}
}})
$objForm.Controls.Add($OKButton)
#Ergebnis Anzeigen
$OKButton = New-Object System.Windows.Forms.Button
$OKButton.Location = New-Object System.Drawing.Size(30,112)
$OKButton.Size = New-Object System.Drawing.Size(300,92)
$OKButton.Text = "Ergebnis anzeigen"
$OKButton.Name = "Egebnis Button"
$OKButton.DialogResult = [System.Windows.Forms.DialogResult]::None
$OKButton.Add_Click({$objTextBox1 = New-Object System.Windows.Forms.TextBox
$objTextBox1.Multiline = $True;
$objTextBox1.Location = New-Object System.Drawing.Size(360,10)
$objTextBox1.Size = New-Object System.Drawing.Size(800,600)
$objTextBox1.Text = $cumulative | Out-String
$objTextBox1.Font = "courier New, 13"
$objTextBox1.Scrollbars = "Vertical"
$objForm.Controls.Add($objTextBox1)
#outgridview
$OKButton = New-Object System.Windows.Forms.Button
$OKButton.Location = New-Object System.Drawing.Size(30,214)
$OKButton.Size = New-Object System.Drawing.Size(300,92)
$OKButton.Text = "Ergebnis in GridView"
$OKButton.Name = "GridView"
$OKButton.DialogResult = "OK"
$OKButton.Add_Click({$cumulative | Out-GridView})
$objForm.Controls.Add($OKButton)
#Export CSV
$OKButton = New-Object System.Windows.Forms.Button
$OKButton.Location = New-Object System.Drawing.Size(30,316)
$OKButton.Size = New-Object System.Drawing.Size(300,92)
$OKButton.Text = "Export CSV (in C:/temp)"
$OKButton.Name = "CSV"
$OKButton.DialogResult = "OK"
$OKButton.Add_Click({$cumulative | Export-Csv -Path 'C:\temp\SMTPresult.Csv'})
$objForm.Controls.Add($OKButton) })
$objForm.Controls.Add($OKButton)
[void] $objForm.ShowDialog()
The first $OKButton should basically filter the .txt file which is defined in $path and then in the lower part count the results together, when i press it an progressbar starts in the background in the ISE, but i noticed that there is no result saved in $result or in $cumulative. If it would work than i guess i could display the results with the lower button.
What do i miss here, cant i define varaibles with buttons?

Answer 1

For anyone who might get the same Problem i got the result after trying. The Problem was the scope of both of my variables $result & $cummulative. Since they were created in an Button they also only function in that Button. To use them after i clicked the Button i just had to add $global:
So in the end it looked like
$OKButton.Add_Click({$i= 0
$length = (Get-Content $path).Length
#Datum, Hostname und Message Nummer
$global:result = Get-Content $path | ForEach-Object {
if($_ -match '(\d{2}\.\d{2}\.\d{4} \d{2}:\d{2}:\d{2}).*\(((?:\d{1,3}\.){3}\d{1,3})\) disconnected\.?\s+(\d+) message\[s\]'){
try {
#$dns = [System.Net.Dns]::GetHostEntry($matches[2]).HostName
}
catch {
#$dns = 'Not available'
}
[PsCustomObject]#{
IP = $matches[2]
Messages = [int]$matches[3]
#DNSName = $dns
Date = [datetime]::ParseExact($matches[1], 'dd.MM.yyyy HH:mm:ss', $null)
}}
$i++
if($i % 1000 -eq 0){
Write-Progress -activity "Searching for matches" -status "Scanned: $i of $($length)" -percentComplete (($i / $length) * 100)
}}
Write-Progress -activity "Searching for matches" -status "Scanned: $i of $($length)" -percentComplete (($i / $length) * 100)
#Messages Counted
$global:cumulative = $result | Group-Object -Property IP | ForEach-Object {
[PsCustomObject]#{
IP = $_.Name
Messages = ($_.Group | Measure-Object -Property Messages -Sum).Sum
#DNSName = $_.Group[0].DNSName
Date = ($_.Group | Sort-Object Date)[-1].Date
}
}})
$objForm.Controls.Add($OKButton)