Creating a Windows Form in PowerShell

The script here is a demonstration of how PowerShell can be used to create .NET objects such as Windows forms.  This code creates and builds a GUI along with button click events.  As a demonstration it is designed to read a csv file (using the Open File Dialog box to locate it) and work with controls on the page.

 

# Demonstration code to create a .NET Windows Form, populate it with controls and use it
# to read and process a file.

# Load the .NET Assemblies
[void][System.Reflection.Assembly]::LoadWithPartialName(“System.windows.forms”)
[void][reflection.assembly]::LoadWithPartialName(“System.Drawing”)

function LoadCSV(){
# Clear any items that may exist in the lists.
$count = $form.Controls[“lstNames”].Items.Count – 1
for ($i = $count;$i -ge 0;$i–)
{
$form.Controls[“lstNames”].Items.RemoveAt($i)
$form.Controls[“lstEmails”].Items.RemoveAt($i)
$form.Controls[“lstphones”].Items.RemoveAt($i)
}

[System.Windows.Forms.OpenFileDialog]$ofd = New-Object System.Windows.Forms.OpenFileDialog
$ofd.ShowHelp = $True
$ofd.Filter = “CSV Files (*.csv)|*.csv|All Files (*.*)|*.*”
if ($ofd.ShowDialog() -eq “OK”)
{
$details = Import-Csv -Path $ofd.FileName
foreach ($line in $details)
{
$form.Controls[“lstNames”].Items.Add($line.Name)
$form.Controls[“lstEmails”].Items.Add($line.Email)
$form.Controls[“lstphones”].Items.Add($line.Phone)
}
}
}

function ProcessDetails()
{
Clear-Host
for ($i = 0;$i -lt $form.Controls[“lstNames”].Items.Count;++$i)
{
Write-Host $form.Controls[“lstNames”].Items[$i] ” – ” $form.Controls[“lstEmails”].Items[$i] ” – ” $form.Controls[“lstphones”].Items[$i]
}
}

function BuildForm()
{
#Create the form
$form = new-object Windows.Forms.form
$form.Size = new-object System.Drawing.Size @(800,300)
$form.text = “Demo Form created with PowerShell”

#Create the buttons
$btnLoadCSV = New-Object System.Windows.Forms.Button
$btnLoadCSV.Width=100
$btnLoadCSV.Location = New-Object System.Drawing.Size(350, 10)
$btnLoadCSV.Text = “Load CSV File”

$btnProcessCSV = New-Object System.Windows.Forms.Button
$btnProcessCSV.Width = 100
$btnProcessCSV.Text = “Process CSV Data”
$btnProcessCSV.Location = New-Object System.Drawing.Size(350, 35)

#Create the list boxes and their assosciated labels.
#Names
$lblNames = New-Object System.Windows.Forms.Label
$lblNames.Text = “Names”
$lblNames.Location = New-Object System.Drawing.Size(50, 75)

$lstNames = New-Object System.Windows.Forms.ListBox
$lstNames.Name = “lstNames”
$lstNames.Width = 200
$lstNames.Height = 100
$lstNames.Location = New-Object System.Drawing.Size(50, 100)

#Email addresses
$lblEmails = New-Object System.Windows.Forms.Label
$lblEmails.Text = “Email Addresses”
$lblEmails.Location = New-Object System.Drawing.Size(300, 75)

$lstEmails = New-Object System.Windows.Forms.ListBox
$lstEmails.Name = “lstEmails”
$lstEmails.Width = 200
$lstEmails.Height = 100
$lstEmails.Location = New-Object System.Drawing.Size(300, 100)

#Phone numbers
$lblPhones = New-Object System.Windows.Forms.Label
$lblPhones.Text = “Phone Numbers”
$lblPhones.Location = New-Object System.Drawing.Size(550, 75)

$lstPhones = New-Object System.Windows.Forms.ListBox
$lstPhones.Name = “lstPhones”
$lstPhones.Width = 200
$lstPhones.Height = 100
$lstPhones.Location = New-Object System.Drawing.Size(550, 100)

#Add the controls to the form
$form.Controls.Add($btnLoadCSV)
$form.Controls.Add($btnProcessCSV)
$form.Controls.Add($lstNames)
$form.Controls.Add($lstEmails)
$form.Controls.Add($lstPhones)
$form.Controls.Add($lblNames)
$form.Controls.Add($lblEmails)
$form.Controls.Add($lblPhones)

$btnLoadCSV.add_click({LoadCSV})
$btnProcessCSV.add_click({ProcessDetails})
return $form
}

$form = BuildForm;
$form.ShowDialog();