function button()

[newbi2009]

Hi Forum,
because i use quite a lot of buttons in a script, i thought about not having to type the code for every single button, but to outsource this as a function.
I want to have different output on the screen depending on which button is pressed, before the window is closed. Now this works fine as long as I only include ONE button in the script.
If I want to have TWO or more buttons with different outputs/commands on the "Add_click"-event, I always overwrite this variable with the last entered value of the variable $Add_Click

I cannot figure, how to pass the command for the "$Add_click"-event for each button to the function?
thanks for your help
Greetings
newbi

Here is the code I have so far:

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

1. function Button{
2.   param(
3.     [int]$x,
4.         [int]$y,
5.     [string]$Text
6.       #[string]$Add_Click    #not used, since I connot find a way to get this passed into the function
7.       )
8.  
9. $Button = New-Object System.Windows.Forms.Button    
10. $Button.Location = New-Object System.Drawing.Size($x,$y)
11. $Button.Size = New-Object System.Drawing.Size(100,66)
12. $Button.Text = $Text
13. $Button.Add_Click({ .$Add_click
14.                                 $obfForm.close()
15.                               })
16. $obfForm.Controls.Add($Button)
17. }
18.  
19. #----------------------- window beginns--------------------------------------
20.  
21. $myWindow = New-Object System.Windows.Forms.Form                                        
22. $myWindow.Size = New-Object System.Drawing.Size(420,230)
23. $myWindow.Text = "my window"
24.  
25. #----------------------- close button 1--------------------------------------
26.  
27. $obfForm=$myWindow
28.  
29. Button 1 10 "cancel-A"
30. $Add_Click={
31.                    write-host "Function >A< ended" ;
32.                    write-host "******************************************************"
33.                   }
34. #----------------------- close button 2--------------------------------------
35.  
36.  
37. Button 200 10 "cancel-B"
38. $Add_Click={
39.                    write-host "another ouput should be written, when clicking Button-B";
40.                    write-host "******************************************************"
41.                   }  
42.  
43.  
44. [void] $myWindow.ShowDialog()
45.  

[jvierra]

Just create a click event and add it to all buttons. You don't have to use separate scripts for each button.

You can tell which button called the event by inspecting the $this object. It is the button object that generated the event.

There is no need for a function. Event code is a function called formally an "anonymous function" in compiled system. In PowerShell it is just a script block

You should never give a function a name that is the same as a Net Framework "type".

To auto-create controls you can do it in a loop but alter the name of the control being created and its location. Use the control objects method <control>.AddClick($click_script_block)

You can also pass a script block as a function argument and use the "add" method to add the script block to the control click event.

[jvierra]

Here is a simple hint at how this works.

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

1. function Create-Button{
2.     Param(
3.         [string]$Name,
4.         [string]$text,
5.         [int]$x,
6.         [int]$y,
7.         [scriptblock]$AddClick
8.     )
9.    
10.     $Button = New-Object System.Windows.Forms.Button
11.     $Button.Location = New-Object System.Drawing.Size($x, $y)
12.     $Button.Size = New-Object System.Drawing.Size(100, 66)
13.     $Button.Text = $Text
14.     $Button.Add_Click($AddClick)
15.     $Form1.Controls.Add($Button)
16. }
17.  
18. $Form1 = New-Object System.Windows.Forms.Form
19. $Form1.Size = New-Object System.Drawing.Size(420, 230)
20. $Form1.Text = "my window"
21.  
22.  
23. Create-Button -Name Button1 -text 'My Button A' -x 10 -y 10 -AddClick {
24.                     write-host "Function >A< ended";
25.                     write-host "******************************************************"
26.                 }
27.  
28. Create-Button -Name Button2 -text 'My Button B' -x 250 -y 10 -AddClick {
29.                     write-host "another ouput should be written, when clicking Button-B";
30.                     write-host "******************************************************"
31.                 }
32.  
33.  
34. [void]$Form1.ShowDialog()
35.  

[newbi2009]

Ahhh - very cool! Thanks for this explanation. This helps a lot!