a Tricky problem about Enabled = true/False - Needs Experience

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Jul 28th, 2004, 05:25 AM
maged

a Tricky problem about Enabled = true/False - Needs Experience
hi all,

I am using a listbox on a windows form to get a list of clients, when i user click on an item it should retrieve the summary of all his invoices ( so it takes some time). I am disabling the form so that user can never click on a client before finishing the previous data retrieval , so my code is like the following:
VB Code:
```
'in the list1.selectedindexchanged event
 
me.enabled = false
'''''open datareader
'''''retrieve data
'''''close datareader
me.enabled = true
```
it works very very fine, except for one thing.

when i click an item with the mouse, it works great but !! when i try to navigate the items in the list by using Arrows it doesn't change the selected item. i suppose that is because of the disabling of the form. So how can i force changing of selected item before applying ( me.enabled = false)

THX in Advance

BST RGDS
Jul 28th, 2004, 05:43 AM
pax

Hi.

I'm not sure I understand correctly. Do you want to update the screen or does the event not fire?

If you only want to update the display you should add a Me.Refresh before disabling the form.

The event should fire regardless of you use mouse or keyboard (but there's a good chance that the event fires before the display is updated when using arrowkeys)
Jul 28th, 2004, 05:43 AM
carlblanchard

isnt it the case that because the form is disabled that all the controls on the form should also be disabled, You should even be able to click it with the mouse.
Jul 29th, 2004, 02:17 AM
maged

for the first answer, i used the refresh and / or Update method of the listbox before disabling the form but nothing changed , It just accepts mouse clicks and does not respond to arrow keys.

I am sure the problem is in ( me.enabled = false) because soon as i remove it, everything goes ok.

Regarding the

Quote:

isnt it the case that because the form is disabled that all the controls on the form should also be disabled, You should even be able to click it with the mouse.

please let me remind you that i disable the form after the selectedindexchanged Event , and so the user has already the ability to click. the control is not disabled before clicking or keypressing.