Solved

How To Update GUI From Another PowerShell Job

Posted on 2015-01-09
3
565 Views
Last Modified: 2015-01-12
So, I have a form. I want a button click to do something without locking up the form. I've done this in C#: I create a background worker and use the BeginInvoke method to update GUI elements and be thread safe. How do I do it in PowerShell? Here is what I've got so far:

$mainform = New-Object System.Windows.Forms.Form
$mainform.Text = "Test Form"
$mainform.Size = New-Object System.Drawing.Size(500,500)
$mainform.StartPosition = "CenterScreen"
$mainform.AutoSize = $false
$mainform.MinimizeBox = $false
$mainform.MaximizeBox = $false
$mainform.SizeGripStyle = "Hide"
$mainform.WindowState = "Normal"
$mainform.FormBorderStyle = "Fixed3D"
$mainfont = New-Object System.Drawing.Font("Arial",12)
$mainform.Font = $font

$statustxtbx = New-Object System.Windows.Forms.TextBox
$statustxtbx.Size = New-Object System.Drawing.Size(400,300)
$statustxtbx.Top = 60
$statustxtbx.Name = "StatusTextBox"
$statustxtbx.Multiline = $true
$statustxtbx.ScrollBars = "Vertical"
$statustxtbx.WordWrap = $true
$mainform.Controls.Add($statustxtbx)

$addbtn = New-Object System.Windows.Forms.Button
$addbtn.Size = New-Object System.Drawing.Size(80,30)
$addbtn.Text = "Add"
$addbtn.Add_Click({
    Start-Job -Name AddClick -ScriptBlock {
        [System.Windows.Forms.Messagebox]::Show("Hi")
        $statustxtbx.BeginInvoke({$statustxtbx.Text = "Disabling controls..."})
        for ($i = 0;$i -lt $mainform.Controls.Count; $i++) {
            $c = $mainform.Controls[$i]
            if ($c.Name -notlike "StatusTextBox") {
                $c.BeginInvoke({$c.Enabled = $false})
            }
        }
        $statustxtbx.BeginInvoke({$statustxtbx.Text += "done.`r`n`r`nSleeping for 10 seconds..."})
        sleep -Seconds 10
        $mainform.BeginInvoke({$statustxtbx.Text += "done.`r`nEnabling controls..."})
        for ($i = 0;$i -lt $mainform.Controls.Count; $i++) {
            $c = $mainform.Controls[$i]
            if ($c.Name -notlike "StatusTextBox") {
                $mainform.BeginInvoke({$c.Enabled = $true})
            }
        }
        $statustxtbx.BeginInvoke({$statustxtbx.Text += "done."})
    }
    #$statustxtbx.Text += "Some Text `r`n"
})
$mainform.Controls.Add($addbtn)
$mainform.Add_Shown({$mainform.Activate()})
$mainform.ShowDialog()

Open in new window

0
Comment
Question by:byt3
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 11

Accepted Solution

by:
Joe Klimis earned 500 total points
ID: 40543009
Hi
You have used start-job, when  I think you need to be using runspaces which will allow you to share  varialbles between processes

An example of this can be found here  , http://learn-powershell.net/2013/04/19/sharing-variables-and-live-objects-between-powershell-runspaces/sharing-variables-and-live-objects-between-powershell-runspaces

if you detail you exact requirements i will try and help you
0
 
LVL 2

Author Comment

by:byt3
ID: 40544577
Thanks for the link. I will check it out and see how to use runspaces.

Ultimately this is a tool that a client will use to create public folders and mail enable them. That part I don't need assistance on. What I need help with is after the button is clicked and the public folder stuff is happening I need to the form to not lock up by using a background process somehow. During the process I want to update the text in the textbox as an output of what the tool is currently doing.
0
 
LVL 2

Author Comment

by:byt3
ID: 40546000
Runscpaces is exactly what I needed. I also need to change the code for invoking the control as well:

BeginInvoke( { <code> } )

Open in new window


To

BeginInvoke( [action]{ <code } )

Open in new window

0

Featured Post

How Do You Stack Up Against Your Peers?

With today’s modern enterprise so dependent on digital infrastructures, the impact of major incidents has increased dramatically. Grab the report now to gain insight into how your organization ranks against your peers and learn best-in-class strategies to resolve incidents.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Windows 10 came with  a lot of built in applications, Some organisations leave them there, some will control them using GPO's. This Article is useful for those who do not want to have any applications in their image (example:me).
My attempt to use PowerShell and other great resources found online to simplify the deployment of Office 365 ProPlus client components to any workstation that needs it, regardless of existing Office components that may be needing attention.
Exchange organizations may use the Journaling Agent of the Transport Service to archive messages going through Exchange. However, if the Transport Service is integrated with some email content management application (such as an antispam), the admini…
There's a multitude of different network monitoring solutions out there, and you're probably wondering what makes NetCrunch so special. It's completely agentless, but does let you create an agent, if you desire. It offers powerful scalability …

688 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question