Simple question regarding postback and viewstate

[dave]

I have created a web form with 3 different inputs, 1 drop
down and 2 list boxes. The drop down selection populates
the two list boxes, and I can get this render once, no
problem, I now want to change the contents, of either
list box based upon multiple selections in the list
boxes. In short I want to re-render the list box's
contents, based on the list box choices, UNFORTUNATELY,
it seems to only appned new choices, and not re-write the
result set as desired. Any body have any idea?

thanks

dave

[dave]

More simply put.

Is there a way to reset the following:

ListBox.Items.Add(memberfirst[h]);

I have tried

ListBox.Items.Insert(h,memberfirst[h]);

and puts the new entries at the beginning, and won't get
rid of the old entries.
Is there a way to reset ListBox.Items, each time the
button is clicked?

-----Original Message-----
I have created a web form with 3 different inputs, 1 dropdown and 2 list boxes. The drop down selection populates
the two list boxes, and I can get this render once, no
problem, I now want to change the contents, of either
list box based upon multiple selections in the list
boxes. In short I want to re-render the list box's
contents, based on the list box choices, UNFORTUNATELY,
it seems to only appned new choices, and not re-write theresult set as desired. Any body have any idea?

thanks

dave
.

[Madhu [MVP]]

Hi Dave

How are you adding the items to the listbox. are you doing databinding??? because if you are doing databinding then i guess you can rebind the datasource and that should work

Let me know how you are adding the items..

Regards
Madh

MVP | MCSD.NE

----- dave wrote: ----

I have created a web form with 3 different inputs, 1 drop
down and 2 list boxes. The drop down selection populates
the two list boxes, and I can get this render once, no
problem, I now want to change the contents, of either
list box based upon multiple selections in the list
boxes. In short I want to re-render the list box's
contents, based on the list box choices, UNFORTUNATELY,
it seems to only appned new choices, and not re-write the
result set as desired. Any body have any idea

thank

dav