How to limit number of lines in a TextBox and split the lines to strings? - arrays

Question

How can I achieve that the input of the TextBox with multilines is only possible to a specific number of lines e.g. 10 lines only.
Further I want to get the input of each line and write each line to a separate variable to work later with this variables. It would be nice if the user gets a messagebox with warning that only 10 lines are possible.
Any help would be appreciated
[reflection.assembly]::loadwithpartialname("System.Windows.Forms") | Out-Null
[reflection.assembly]::loadwithpartialname("System.Drawing") | Out-Null
#Assembly PresentationFramework wird geladen
Add-Type -AssemblyName PresentationFramework
$form = New-Object System.Windows.Forms.Form
$form.StartPosition = 'CenterScreen' #Formstartposition Zentrum
$form.Size = New-Object System.Drawing.Size(500,400)
$textBox = New-Object System.Windows.Forms.TextBox
$textBox.DataBindings.DefaultDataSourceUpdateMode = 0
$textBox.Location = New-Object System.Drawing.Point((110),(90))
$textBox.Size = New-Object System.Drawing.Size(288,150)
$textBox.TabIndex = 0
$textBox.Multiline =$true
$form.Controls.Add($textBox)
$form.ShowDialog() | Out-Null

Answer 1

1.Get Line count on the event of TextChanged.
2.Turn the iList into a ArrayList.
3.Get the difference from max line to current line count.
4.Remove the range from the ArrayList.
5.Set the content of the Textbox to the Arraylist
6.Set the curser to end of textbox.
$TextboxMaxLines = 10
$textBox.Add_TextChanged({
If($textBox.Lines.Count -gt $TextboxMaxLines){
[System.Collections.ArrayList]$AL = $textBox.Lines
[int]$LC = ($textBox.Lines.Count - $TextboxMaxLines)
$Al.RemoveRange($TextboxMaxLines, $LC)
$textbox.Lines = $AL
$textbox.SelectionStart = ($textbox.Text.Length)
$textbox.SelectionLength = 0
}
})