passing a combobox object as function argument

[Bart]

Hi,
I'm having trouble passing an combobox object as a function argument. The objhect seems to be referring to a null value when I try to access the methods.
Do I need to cast this in a special way?
There is no problem filling the combo with the array outside the function.

[System.Reflection.Assembly]::LoadWithPartialName("System.Drawing")
[System.Reflection.Assembly]::LoadWithPartialName("System.windows.forms") | out-null

Function Initialise_Combo([System.object]$combo,[array]$list)
{ #args[0] ref to combo
#args[1] ref to items array
$combo.items.addrange($list)
}
...

# create form

$form = new-object System.Windows.Forms.form
$form.Text = "Workstation Profile Picker"
$form.size = new-object System.Drawing.Size(500,400)

# Add dept and roles combo

$DeptDrop = new-object System.Windows.Forms.ComboBox
$DeptDrop.Location = new-object System.Drawing.Size(10,30)
$DeptDrop.Size = new-object System.Drawing.Size(80,30)
$DeptDrop.Sorted = 1
$form.Controls.Add($DeptDrop)

.... some code to create and initialise the hash...
.... some code to activate the form

# this works
$DeptDrop.Items.addrange([array]$hash_dept.psbase.values)

#this doesn't work ($combo seems to be pointing to a null value)
Initialise_Combo($DeptDrop,[array]$hash_dept.psbase.values)

Anyone?

Kind regards,
Bart.

[j***@gmail.com]

Post by Bart
Hi,
I'm having trouble passing an combobox object as a function argument. The objhect seems to be referring to a null value when I try to access the methods.
Do I need to cast this in a special way?
There is no problem filling the combo with the array outside the function.
[System.Reflection.Assembly]::LoadWithPartialName("System.Drawing")
[System.Reflection.Assembly]::LoadWithPartialName("System.windows.forms") | out-null
Function Initialise_Combo([System.object]$combo,[array]$list)
{ #args[0] ref to combo
#args[1] ref to items array
$combo.items.addrange($list)}
...
# create form
$form = new-object System.Windows.Forms.form
$form.Text = "Workstation Profile Picker"
$form.size = new-object System.Drawing.Size(500,400)
# Add dept and roles combo
$DeptDrop = new-object System.Windows.Forms.ComboBox
$DeptDrop.Location = new-object System.Drawing.Size(10,30)
$DeptDrop.Size = new-object System.Drawing.Size(80,30)
$DeptDrop.Sorted = 1
$form.Controls.Add($DeptDrop)
.... some code to create and initialise the hash...
.... some code to activate the form
# this works
$DeptDrop.Items.addrange([array]$hash_dept.psbase.values)
#this doesn't work ($combo seems to be pointing to a null value)
Initialise_Combo($DeptDrop,[array]$hash_dept.psbase.values)
Anyone?
Kind regards,
Bart.

The problem is with the way you are calling your method. In
PowerShell, functions are called like commands. Your call to the
Initialise_Combo should look like this:

Initialise_Combo $DeptDrop $hash_dept.psbase.values

The comma between the arguments combines the two arguments into an
array, so your $combo parameter is getting an Object array rather than
the ComboBox, and the $list parameter is getting nothing at all.

I hope this helps.

[Bart]

Shame on me... the comma was indeed the cause of this issue.
Thanks Jeff!

Kind regards,
Bart.

Post by j***@gmail.com

Post by Bart
Hi,
I'm having trouble passing an combobox object as a function argument. The
objhect seems to be referring to a null value when I try to access the
methods.
Do I need to cast this in a special way?
There is no problem filling the combo with the array outside the function.
[System.Reflection.Assembly]::LoadWithPartialName("System.Drawing")
[System.Reflection.Assembly]::LoadWithPartialName("System.windows.forms") | out-null
Function Initialise_Combo([System.object]$combo,[array]$list)
{ #args[0] ref to combo
#args[1] ref to items array
$combo.items.addrange($list)}
...
# create form
$form = new-object System.Windows.Forms.form
$form.Text = "Workstation Profile Picker"
$form.size = new-object System.Drawing.Size(500,400)
# Add dept and roles combo
$DeptDrop = new-object System.Windows.Forms.ComboBox
$DeptDrop.Location = new-object System.Drawing.Size(10,30)
$DeptDrop.Size = new-object System.Drawing.Size(80,30)
$DeptDrop.Sorted = 1
$form.Controls.Add($DeptDrop)
.... some code to create and initialise the hash...
.... some code to activate the form
# this works
$DeptDrop.Items.addrange([array]$hash_dept.psbase.values)
#this doesn't work ($combo seems to be pointing to a null value)
Initialise_Combo($DeptDrop,[array]$hash_dept.psbase.values)
Anyone?
Kind regards,
Bart.

The problem is with the way you are calling your method. In
PowerShell, functions are called like commands. Your call to the
Initialise_Combo $DeptDrop $hash_dept.psbase.values
The comma between the arguments combines the two arguments into an
array, so your $combo parameter is getting an Object array rather than
the ComboBox, and the $list parameter is getting nothing at all.
I hope this helps.