Why Control_Change() event is fired before Form_Load()?

[neo008]

Hi all,

Why Control_Change() event is fired before Form_Load()?


NE☼

[Killer42]

Why Control_Change() event is fired before Form_Load()?

I don't think it is.

In any case, which version of VB are you referring to?

[neo008]

Ofcourse it should not, as I believe too. I'm using VB6.

I saw it by using "step into" (F8) from Debug menu.


I think my Console is to be repaired.


NE☼

[Killer42]

What sort of control is it? Perhaps it is firing an event when it shouldn't (assuming that's possible).

[pureenhanoi]

Hi all,

Why Control_Change() event is fired before Form_Load()?


NE☼

this appears only when u try changing some properties of form's controls before using .Show method.
Example:
Form1 Code

Private Sub Command1_Click()
'yours calculate here
result = calculate(smthing)
Form2.Text1.Text = result
Form2.Show
End Sub
 

Here, i calculated some value in form1 and pass it through form2. If u do so, either, u will sometime see Form2 load twice. One before Text1_Change() and one after.

[Killer42]

...Here, i calculated some value in form1 and pass it through form2. If u do so, either, u will sometime see Form2 load twice. One before Text1_Change() and one after.

That's interesting. Even if you do this, it should only load the form once, unless you unload it in between. As soon as you access the contents of the form (Form2.Text1.Text in this case) the form must first be loaded. It should not then be loaded again when you show it, merely made visible.

In theory, that is.

[Killer42]

A quick test verifies this. As soon as you access a property of the control (text property of a textbox in my test) the form is loaded, then the control's change event fires. Then when you Show the form, neither event fires. As expected.

[neo008]

Yeah, quick test verifies as expected. This is why i'm surprised why it's showing behavior which is unexpected.

Surely there is a reason behind it means I'm using/doing something which made textbox_change event to be fired before form load.

I am doing simple tax, amount calculations in form and no form properties are being accessed (atleast in change events)

I will surely find and tell you the reason soon. Any comment/Idea is welcome.

NE☼

[hariharanmca]

Hi all,

Why Control_Change() event is fired before Form_Load()?


NE☼

i think this may happen

Private sub control_Change()
    Control.text = ”Changed”
End sub
 
Private sub Form_Load()
    Control.text = ”Do not Chang”
End sub

Then output will be :

Control.text = ”Changed”

[Killer42]

i think this may happen...

Possibly, but I think neo008 indicated that stepping through the code showed the sequence in which they fired.