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Read multi line input from users in PowerShell using messagebox
# This script is used in a blog post on the https://mohitgoyal.co/2017/04/16/read-multi-line-input-from-users-in-powershell/. Please
# read the blog post for more information
function Read-MultiLineInputBoxDialog([string]$Message, [string]$WindowTitle, [string]$DefaultText)
{
Add-Type -AssemblyName System.Drawing
Add-Type -AssemblyName System.Windows.Forms
# Create the Label.
$label = New-Object System.Windows.Forms.Label
$label.Location = New-Object System.Drawing.Size(10,10)
$label.Size = New-Object System.Drawing.Size(280,20)
$label.AutoSize = $true
$label.Text = $Message
# Create the TextBox used to capture the user's text.
$textBox = New-Object System.Windows.Forms.TextBox
$textBox.Location = New-Object System.Drawing.Size(10,40)
$textBox.Size = New-Object System.Drawing.Size(575,200)
$textBox.AcceptsReturn = $true
$textBox.AcceptsTab = $false
$textBox.Multiline = $true
$textBox.ScrollBars = 'Both'
$textBox.Text = $DefaultText
# Create the OK button.
$okButton = New-Object System.Windows.Forms.Button
$okButton.Location = New-Object System.Drawing.Size(415,250)
$okButton.Size = New-Object System.Drawing.Size(75,25)
$okButton.Text = "OK"
$okButton.Add_Click({ $form.Tag = $textBox.Text; $form.Close() })
# Create the Cancel button.
$cancelButton = New-Object System.Windows.Forms.Button
$cancelButton.Location = New-Object System.Drawing.Size(510,250)
$cancelButton.Size = New-Object System.Drawing.Size(75,25)
$cancelButton.Text = "Cancel"
$cancelButton.Add_Click({ $form.Tag = $null; $form.Close() })
# Create the form.
$form = New-Object System.Windows.Forms.Form
$form.Text = $WindowTitle
$form.Size = New-Object System.Drawing.Size(610,320)
$form.FormBorderStyle = 'FixedSingle'
$form.StartPosition = "CenterScreen"
$form.AutoSizeMode = 'GrowAndShrink'
$form.Topmost = $True
$form.AcceptButton = $okButton
$form.CancelButton = $cancelButton
$form.ShowInTaskbar = $true
# Add all of the controls to the form.
$form.Controls.Add($label)
$form.Controls.Add($textBox)
$form.Controls.Add($okButton)
$form.Controls.Add($cancelButton)
# Initialize and show the form.
$form.Add_Shown({$form.Activate()})
$form.ShowDialog() > $null # Trash the text of the button that was clicked.
# Return the text that the user entered.
return $form.Tag
}
$multiLineText = Read-MultiLineInputBoxDialog -Message "Please enter some text. It can be multiple lines" -WindowTitle "Multi Line Example" -DefaultText "Enter some text here..."
if ($multiLineText -eq $null) { Write-Host "You clicked Cancel" }
else { Write-Host "You entered the following text: $multiLineText" }
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