Context Menu problem

[Guest]

Hi all,

Lately I have been working on an application in VB .net CF for Pocket PC
device. I have a small question about Context Menu.

When I try to close the window after context menu is poped up, the window
does not closes until I click on the window. Below is the code. Hopefully,
you can help me out.


Friend WithEvents ContextMenu1 As System.Windows.Forms.ContextMenu
-----Remember ContextMenu1 has no menu items added.---------
'Setting context menu for the listview. When user holds the mouse on the
listview item, then context menu pop up event is fired. Look below to see the
code
Me.ListView1.ContextMenu = Me.ContextMenu1

Private Sub ContextMenu1_Popup(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles ContextMenu1.Popup
Me.Close() 'The window does not closes. Don't know why
End Sub

Your help will be appreciated

 

[W.G. Ryan eMVP]

Mohit:

I'm not sure I follow what you're trying to do. Popup is triggered right
before the menu is shown. As such, why would you want to close the form
it's based on before it's shown - nothing could be selected if you could
successfully close it. If you do it successfully I'm pretty cure you're
going to raise an exception - b/c you can't access a disposed object. You
don't know for sure exactly the sequence that will fire but close is going
to call dispose so the sender won't exist.

 

[Guest]

HI Ryan

Actually, let me explain what I am doing.

THere is a LISTVIEW object in an application that has, for example, 10 rows.
Now, as I am developing on .NET CF framework, which in other words means an
applicaiton is developed for Pocket PC. Therefore, what I want to do is to
hold the stylus on to the item until context menu popup event is fired.

For that reason I created a new ContextMenu object having no menu items in
it. I assigned this context menu to LISTVIEW object. Without any problems,
context menu popup is fired when I hold my stylus for longer period of time
on the selected item.

For more information, every item has an ID associated (in this example) with
it. When an item is selected and context menu pop up is fired, I pass that ID
to the next form that I show as a dialog box. Once the form dialog if closed,
I come back to my context menu popup function and want to close the parent
window. But when I try to close it nothing happens until stylus touches the
screen.

Bit for more code


Private Sub ContextMenu1_Popup(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles ContextMenu1.Popup
Dim formObj As New Form2
formObj.setValues(ListView1.selectedItem(0).text)
formObj.showDialog() 'Perform some task and close it
'After the dialog form is closed, close this window as well.
Me.Close() 'The window does not closes. Don't know why
End Sub

I think now you have more idea of what I am trying to do. Definitely there
is another way, if you are thinking about it, for example, have a button and
perform the same task when the button is clicked. I have already been
successful that way but I want to resolve the above mentioned issue.

 

[W.G. Ryan eMVP]

Ok, so there's something going on in between popup and close...

Anyway, I have form1, Form2 and form3. On form2 I have a listView with an
empty context menu. When form1 loads I declare a new Form2 and show it. On
Popup on Form2 I have the following code:
Dim f3 As New Form3

Select Case f3.ShowDialog

Case DialogResult.OK

Me.Close()

End Select

On Form3 I stuck this behind a button just to get it to close ---

Me.DialogResult = DialogResult.OK



I've run it on my iMATE and a iPAQ 1940 as well as the emulator, it works as
expected each time. You may want to try Application.DoEvents because it's
possible that your screen just isn't refreshing although I doubt it. I
can't seem to replicate the behavior

 

[Guest]

Hi Ryan,

I have done the same, but problem still seems to exists. As soon as my
stylus hits the screen, my screen closes. I think my event is still pending.
It resumes when stylus hits the ground. Is there any way to explicity call
the hit of stylus on the screen?