Problem with Autopostback

[Jesse]

I have a relatively long page with a number of webcontrols with
"autopostback" set to true. The contents/items/datasources of the subsequent
webcontrols are dynamically populated depending on the selection of previous
webcontrols' selected item.

My question is : everytime the user selects an option from a webcontrol, due
to the autopostback being turned on, the page refreshes itself to populate
the subsequent controls. The problem I have is that when it refreshes, it
always ends up showing the top of my very long page.

Are there anyway i could somehow return to the location of the last selected
control that triggered that event or the next control after that? Anchors
does not work here, does it? If not, then how do i do it?

Please help!

[Natty Gur]

Hi,

Turn the smartnavigation on.

[url]http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/h[/url]
tml/frlrfsystemwebuipageclasssmartnavigationtopic.asp

Natty Gur, CTO
Dao2Com Ltd.
28th Baruch Hirsch st. Bnei-Brak
Israel , 51114

Phone Numbers:
Office: +972-(0)3-5786668
Fax: +972-(0)3-5703475
Mobile: +972-(0)58-888377

Know the overall picture


*** Sent via Developersdex [url]http://www.developersdex.com[/url] ***
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[Jason Turim]

Add the following to the page directives, it works for ie5 and above maybe
others
<%@Page ... SmartNavigation="true"%>

"Jesse" <jesselch@hotmail.com> wrote in message
news:eUeqcPBTDHA.2852@tk2msftngp13.phx.gbl...

> I have a relatively long page with a number of webcontrols with
> "autopostback" set to true. The contents/items/datasources of the

subsequent

> webcontrols are dynamically populated depending on the selection of

previous

> webcontrols' selected item.
>
> My question is : everytime the user selects an option from a webcontrol,

due

> to the autopostback being turned on, the page refreshes itself to populate
> the subsequent controls. The problem I have is that when it refreshes, it
> always ends up showing the top of my very long page.
>
> Are there anyway i could somehow return to the location of the last

selected

> control that triggered that event or the next control after that? Anchors
> does not work here, does it? If not, then how do i do it?
>
> Please help!
>
>

[Jos Branders]

"Jesse" <jesselch@hotmail.com> wrote in message
news:eUeqcPBTDHA.2852@tk2msftngp13.phx.gbl...

> I have a relatively long page with a number of webcontrols with
> "autopostback" set to true. The contents/items/datasources of the

subsequent

> webcontrols are dynamically populated depending on the selection of

previous

> webcontrols' selected item.
>
> My question is : everytime the user selects an option from a webcontrol,

due

> to the autopostback being turned on, the page refreshes itself to populate
> the subsequent controls. The problem I have is that when it refreshes, it
> always ends up showing the top of my very long page.
>
> Are there anyway i could somehow return to the location of the last

selected

> control that triggered that event or the next control after that? Anchors
> does not work here, does it? If not, then how do i do it?

To make a workaround in other browsers apart from IE5 and 6, you could
think of inserting a numbered bookmark with each control:
<a name="bookmark01">&nbsp</a>

Then, on postback, insert a script to go to the right bookmark:
Sub InsertScriptBlock()
Dim jScript As new System.Text.StringBuilder()
jScript.Append("<script language='JavaScript'>")
jScript.Append("location.href='#bookmark01';")
jScript.Append("</scr" & "ipt>")
Me.RegisterClientScriptBlock("Bookmark", jScript.ToString())
End Sub

--

Jos Branders

[Jesse]

Thank you Natty Gur!
Thank you Jason Turim!
Thank you Jos Branders!

You guys just saved my life!!!

"Jesse" <jesselch@hotmail.com> wrote in message
news:eUeqcPBTDHA.2852@tk2msftngp13.phx.gbl...

> I have a relatively long page with a number of webcontrols with
> "autopostback" set to true. The contents/items/datasources of the

subsequent

> webcontrols are dynamically populated depending on the selection of

previous

> webcontrols' selected item.
>
> My question is : everytime the user selects an option from a webcontrol,

due

> to the autopostback being turned on, the page refreshes itself to populate
> the subsequent controls. The problem I have is that when it refreshes, it
> always ends up showing the top of my very long page.
>
> Are there anyway i could somehow return to the location of the last

selected

> control that triggered that event or the next control after that? Anchors
> does not work here, does it? If not, then how do i do it?
>
> Please help!
>
>

[mo]

Hi,

I have a set of Dynamic DropDownLists with AutoPostback. the problem I
have is that when I select the dropdown and the page refreshes the old
values in the text boxes disappear. Is there a way to preserve the
values?

Thanks,
Mo

[Jorge Matos]

Make sure you are not accidentally re-initializing your controls. All
controls have viewstate to maintain their values, and therefore in your
Page_Load event you need to make sure you only initialize your drop-downs
when the page is first being requested via HTTP GET request and not during an
HTTP POST request.

inside Page_Load:

public void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
//Initialize drop downs here
}
}

"mo" wrote:

> Hi,
>
> I have a set of Dynamic DropDownLists with AutoPostback. the problem I
> have is that when I select the dropdown and the page refreshes the old
> values in the text boxes disappear. Is there a way to preserve the
> values?
>
> Thanks,
> Mo
>