Retain page postition on button click

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Oct 6th, 2005, 07:34 AM
aconybeare

Retain page postition on button click

Hi,

I'm using a datagrid which may or may not be important, and am adding rows to it, when I add a new row to the grid the page is reloaded and the page goes back to the top I then have to scroll back down to where I was working. Does anyone know how to make it load back to it's original position?

Hope this makes sense if not please let me know

Cheers Al
Oct 6th, 2005, 08:01 AM
Patch21

Re: Retain page postition on button click

You can do this in javascript. You are gonna need to set the X and Y values of the page's position when u scroll down the page. This is all done in the body tag:

Code:

// setting coords of page function ScrollItPage() { window.scrollTo(document.Form1.PageX.value, document.Form1.PageY.value); } function setcoordsPage() { var myPageX; var myPageY; if (document.all) { myPageX = document.body.scrollLeft; myPageY = document.body.scrollTop; } else { myPageX = window.pageXOffset; myPageY = window.pageYOffset; } document.Form1.PageX.value = myPageX; document.Form1.PageY.value = myPageY; }

In your body tag:

Code:

<body onscroll="javascript:setcoordsPage()" onload="javascript:ScrollItPage()" MS_POSITIONING="GridLayout">

Hopefully this helps.
Oct 6th, 2005, 08:02 AM
aconybeare

Re: Retain page postition on button click
I've found that there is a setting IE called SmartNavigation.
VB Code:
```
[HL="#FFFF00"]<%@ Page Language="vb" AutoEventWireup="false" Codebehind="WebForm1.aspx.vb" Inherits="EditGrid.WebForm1" [b]smartNavigation="True"[/b]%>[/HL]
```
Does anyone have any idea's for making this work with other browsers?
Oct 6th, 2005, 08:05 AM
aconybeare

Re: Retain page postition on button click

Patch21,

Thanks for that, I must have just missed your post, I'll check your code out thanks

Cheers Al
Oct 6th, 2005, 08:26 AM
aconybeare

Re: Retain page postition on button click

Patch,

It's doesn't seem to be working? My page gets submitted to the server on each reload. Would that make any difference?

Cheers Al
Oct 6th, 2005, 04:24 PM
mendhak

Re: Retain page postition on button click

Smartnavigation is a buggy P.O.S. feature in ASP.NET development. It's better to use javascript for this which will work across browsers, instead of relying upon SmartNavigation.
Oct 7th, 2005, 04:15 AM
aconybeare

Re: Retain page postition on button click

Mendhak,

Thanks for the heads up.

Does anyone have a working script? In the interests of not reinventing the wheel and all that!! Oh and saving time to. :D

Cheers Al
Oct 7th, 2005, 06:00 AM
Patch21

Re: Retain page postition on button click

What errors are u getting with the javascript above ?
Oct 7th, 2005, 06:04 AM
mendhak

Re: Retain page postition on button click

Did you create two hidden fields called PageX and PageY?
Oct 7th, 2005, 06:12 AM
Patch21

Re: Retain page postition on button click

Ah yeah sorry, forgot to mention that :blush:

Bit of a hack, but works well for me. You need 2 hidden fields with ID's PageX and PageY.
Oct 7th, 2005, 07:02 AM
mendhak

Re: Retain page postition on button click

That's how SmartNavigation works too. It's not an IE feature, but it's a logic and code implementation just like this.

Re: Retain page postition on button click

Thanks guys,

Apologies for the delay in responding I've been away for a couple of days.

I found this on Friday which seems to work, what do you think?

VB Code:

Private Sub registerAnchorScript(ByVal strAnchorID As String)
        ' Source: [url]http://geekswithblogs.net/jawad/archive/2005/05/25/BookMarkJump.aspx[/url]
        Dim sScript As New StringBuilder
 
        sScript.Append("<script language=JavaScript id=""BookMarkScript"">" & vbCrLf)
        sScript.Append("var hashValue=""#" & strAnchorID & """;" & vbCrLf)
        sScript.Append("if(location.hash!=hashValue)" & vbCrLf)
        sScript.Append("location.hash=hashValue;" & vbCrLf)
        sScript.Append("</script>" & vbCrLf)
 
        If (Not Page.IsStartupScriptRegistered("BookMarkScript")) Then
            Page.RegisterStartupScript("BookMarkScript", sScript.ToString)
        End If
    End Sub
    
    Private Sub cmdAddImage_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdAddImage.Click
        ' Call add another row to the submit files datagrid
 
        ' Return the original page position
        registerAnchorScript("graphicsfiles")
    End Sub

Requires an anchor on the page where you want to jump to:

VB Code:

<a href="#" id="jumphere"></a>