"Jim Mitchell" <jim_mitchell@mindspring.com> wrote in message
news:ekr4WJxZDHA.2632@TK2MSFTNGP12.phx.gbl...
> My Goal is to have a dropdown (DL2) filled from the selectIndexChange
event
> of a primary dropdown (DL1). These are picklists that will be selected
> frequently.
>
> Can someone recommend a strategy that will not require the screen to
refresh
> every time.
>
> 1) If I use HTML dropdown lists, how do I trigger a postback?
> 2) Can I load XML into the viewstate and use the viewstate data somehow?
> 3) Should I just bite the bullet and let the screen refresh? How can I
make
> it more efficient?
>
> Thanks in advance.
>
>

"Russell Jones" <arj1@nospam.northstate.net> wrote in message
news:u8FSNhyZDHA.2620@TK2MSFTNGP09.phx.gbl...
> You can use either client-side code that reads an included XML file (see
the
> <xml> tag for more info) or a Web service to accomplish this without
> refreshing the screen. For the first method, create an MSXML document and
> use XPath to extract the cotents of the picklist based on the user's
> selection in the main list. For the second, use the XMLHTTP control or
> remote scripting to obtain the data from the server and populate the pick
> list. If you have only IE clients, you can use the Web services toolkit to
> simplify parsing the Web service return value; otherwise, you'll have to
> parse the returned data yourself (not a big deal).
>
> If the pick lists are small and there aren't too many of them, you can
> pre-build all of them on the server and simply hide and show them on the
> client based on the user's selection in the main list, again using
> client-side code.
>
> "Jim Mitchell" <jim_mitchell@mindspring.com> wrote in message
> news:ekr4WJxZDHA.2632@TK2MSFTNGP12.phx.gbl...
> > My Goal is to have a dropdown (DL2) filled from the selectIndexChange
> event
> > of a primary dropdown (DL1). These are picklists that will be selected
> > frequently.
> >
> > Can someone recommend a strategy that will not require the screen to
> refresh
> > every time.
> >
> > 1) If I use HTML dropdown lists, how do I trigger a postback?
> > 2) Can I load XML into the viewstate and use the viewstate data somehow?
> > 3) Should I just bite the bullet and let the screen refresh? How can I
> make
> > it more efficient?
> >
> > Thanks in advance.
> >
> >
>
>

Jim Mitchell wrote:

> My Goal is to have a dropdown (DL2) filled from the selectIndexChange event
> of a primary dropdown (DL1). These are picklists that will be selected
> frequently.
>
> Can someone recommend a strategy that will not require the screen to refresh
> every time.