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HomeHomeUsing DNN Platf...Using DNN Platf...Administration ...Administration ...how can i control the scroll position through code?how can i control the scroll position through code?
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8/12/2009 10:27 AM
 

does anyone know how to maintain the scroll position through code?

and yes.....i've tried setting "MaintainScrollPositionOnPostback" to "true" but it had NO EFFECT.

 

 
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8/12/2009 10:33 AM
 

Hey James,

There is an element in the markup called ScrollTop that gets updated as you scroll through the page. You can use the following C# code to reset the scroll position to the top of the page.

HtmlInputHidden hdnTop = (HtmlInputHidden)this.Page.FindControl("ScrollTop");
hdnTop.Value = "0";

One gotcha, the value may not get updated in partial postback situations (i.e. when using the update panel) depending on how everything is implemented.

Hope that helps,

Ian


Software Engineer
Co-Founder, dnnGallery
Stack Overflow: Ian Robinson
Twitter: @irobinson
Linked In: Ian Robinson
 
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8/12/2009 10:47 AM
 

Also, if you're searching around for the normal "ASP.NET webforms" way of doing things in regards to scroll position, DNN's "scroll top" functionality overrides everything I've tried - so as far as I know - we don't have any choice but to address ScrollTop directly


Software Engineer
Co-Founder, dnnGallery
Stack Overflow: Ian Robinson
Twitter: @irobinson
Linked In: Ian Robinson
 
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8/12/2009 3:26 PM
 

thanks for the tips......

i found this in the page_load event:

            Dim Scrolltop As HtmlControls.HtmlInputHidden = CType(Page.FindControl("ScrollTop"), HtmlControls.HtmlInputHidden)
            If Scrolltop.Value <> "" Then
                DotNetNuke.UI.Utilities.DNNClientAPI.AddBodyOnloadEventHandler(Page, "__dnn_setScrollTop();")
                Scrolltop.Value = Scrolltop.Value
            End If

i can now SET the position of the scrollbar via code but i can't retrieve whatever the current position is. it seemed that Scrolltop.Value is always = ""

ideally i'd like to be able to retrieve the current position and then set it to that

 
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