My first .NET gui in Powershell

I managed to interface Oracle and a GUI via powershell.

First, load the Oracle and the .NET assemblies

[void] [Reflection.Assembly]::LoadFile("C:\oracle\product\11.2.0\client_1\ODP.NET\bin\2.x\Oracle.DataAccess.dll")
[void] [Reflection.Assembly]::LoadWithPartialName("Drawing")
[void] [Reflection.Assembly]::LoadWithPartialName("Windows.Forms")

Now, let’s retrieve EMP in a powershell array. I hope one of my reader will advise me on a better way :)

$connection=New-Object Oracle.DataAccess.Client.OracleConnection("Data Source=DB01; User Id=scott; password=tiger")
$command=new-object Oracle.DataAccess.Client.OracleCommand("select ename from emp",$connection)
$reader = $command.ExecuteReader()
$a = @()
while ($reader.Read()) {
  $a = $a + $reader.GetString(0)

last, let’s create a simple window (a Form) with a list (a List box) where you can select an item with a doubleclick.

Initialize the list with the array from EMP

$form = New-Object Windows.Forms.Form
$form.Text = "Select employee !"
$form.Size = New-Object Drawing.Size(640,480)
$form.StartPosition = "CenterScreen"
$listbox = New-Object Windows.Forms.ListBox
$listbox.Location = New-Object Drawing.Point(10,10)
$listbox.Size = New-Object Drawing.Size(620,460)
$form.Topmost = $True
[void] $form.ShowDialog()

Show the result (or use it in your powershell scripts)

PS> $listbox.SelectedItems[0]

Pretty cool! No compiler needed, directly run from the powershell prompt