Checked Listbox

[timstspry17]

Product, version and build: PowerShell Studio 2017, 5.4.136
(*** Please do not write "latest" as a version, specify a version number ***)
32 or 64 bit version of product: 64 bit
Operating system: Windows 10
32 or 64 bit OS: 64 bit
PowerShell Version: V5

I am using the Checked Listbox, but don't know how to set the checkbox to checked when I add elements to the listbox? Any help would be appreciated!

[DevinL]

[TOPIC MOVED TO POWERSHELL GUIS FORUM BY MODERATOR]

[DevinL]

Simply call the $checkedListBox.SetItemChecked() method like so:

Code: [Select all] [Expand/Collapse] [Download] (Untitled.ps1)

1. $checkedlistbox1.SetItemChecked(0, $true)

Now the very first item in the ListBox will be checked.

[jvierra]

It might be easier to do this:

Code: [Select all] [Expand/Collapse] [Download] (Untitled.ps1)

1. $checkedlistbox1.Items.Add('My Item',$true)

You can also use data binding to set the checked state to a property in the data source object.

[DevinL]

Oh, I didn't even know that was an available method.

Thanks, Jvierra.

[jvierra]

Devin - there are many methods and approaches. The MSDN docs are a very good place to get all of the options. I always review them repeatedly when wantig to do something new with a control. Eventually it all sticks.

The one weakness of the CheckedListBox is that it does not support full data binding as most other control do. There is a replacement on CodePlex that adds databinding for the checkbox.

We can also do the following to bind to the "DataSource".

Code: [Select all] [Expand/Collapse] [Download] (Untitled.ps1)

1. $form1_Load={
2.    
3.     $path = 'd:\test'
4.     $files = Get-ChildItem $path -File |
5.         Select Name,@{n='Oversize';e={if($_.Length -gt 1Kb){'Checked'}else{'Unchecked'}}}
6.     $dt = ConvertTo-DataTable $files
7.    
8.     $checkedlistbox1.DataSource = $dt
9.     $checkedlistbox1.DisplayMember = 'Name'
10.     $checkedlistbox1.ValueMember = 'Oversize'
11.    
12.     #sync data
13.     (0 .. ($checkedlistbox1.Items.Count-1)) |
14.         ForEach-Object{
15.             $checkedlistbox1.SetItemCheckState($_, $checkedlistbox1.Items[$_].Oversize)
16.         }
17. }