>>VS.NET 2003
>>
>>I have some relatively long forms in my ASP.NET app. When there is a postback, the form jumps back to the top of the page which users are finding annoying.
>>
>>This can apparently be worked around in a couple of ways - one elegant way is outlined at http://www.aspnetpro.com/NewsletterArticle/2003/09/asp200309bm_l/asp200309bm_l.asp
>>
>>I'm still a bit of a newbie in all this - it looks like the article assumes I know just a little more than I actually do :) I can translate the VB.Net, I see where to put the Page.Load PostBack check but I don't see where to put the RegisterHiddenField() function call or the SaveScrollLocation() code i.e. how to hook it all together. Any pointers appreciated.
>
>Al,
>I think using SmartNavigation=true in @page directive would be better (as Viv pointed out already).
>However here is a translation:
>
>

>private void Page_Load(object sender, System.EventArgs e)
>{
>	if (!Page.IsPostBack)
>	{
>          // ...
>	}
>	RegisterHiddenField("__SCROLLLOC", "0");
>	StringBuilder sb = new StringBuilder();
>	sb.Append("<script language='javascript'>");
	sb.Append("function SaveScrollLocation () {");
	sb.Append("     document.forms[0].__SCROLLLOC.value = document.body.scrollTop;");
	sb.Append("}");
	sb.Append("document.body.onscroll=SaveScrollLocation;");
	sb.Append("</script>");
>	if (!IsStartupScriptRegistered("saveScroll"))
>	{ RegisterStartupScript("saveScroll", sb.ToString());	}
>	if (Page.IsPostBack)
>	{
>		StringBuilder _sb = new StringBuilder();
>		_sb.Append("<script language='javascript'>");
		_sb.Append("function SetScrollLocation () {");
		_sb.AppendFormat("     document.body.scrollTop = {0};",Request["__SCROLLLOC"]);
		_sb.Append("}");
		_sb.Append("document.body.onload=SetScrollLocation;");
		_sb.Append("</script>");
>		if (!IsStartupScriptRegistered("setScroll"))
>		{ RegisterStartupScript("setScroll", _sb.ToString()); }
>	}
>}
>

>
>Or in another way (w/o using StringBuilder):
>

>	RegisterHiddenField("__SCROLLLOC", "0");
>	string saveScroll =
>@"<script language='javascript'>
function SaveScrollLocation () {
     document.forms[0].__SCROLLLOC.value = document.body.scrollTop;
}
document.body.onscroll=SaveScrollLocation;
</script>";
>	if (!IsStartupScriptRegistered("saveScroll"))
>	{
>		RegisterStartupScript("saveScroll", saveScroll);
>	}
>	if (Page.IsPostBack)
>	{
>		string setScroll =
>@"<script language='javascript'>
function SetScrollLocation () {
     document.body.scrollTop = " + Request["__SCROLLLOC"].ToString() +
@";}
document.body.onload=SetScrollLocation;
</script>";
>	if (!IsStartupScriptRegistered("setScroll"))
>	{
>	RegisterStartupScript("setScroll", setScroll);
>	}
>}
>

Thanks, Cetin. I tried setting SmartNagivation on 2 test forms that could use scroll control. For maintaining scroll position, it worked for 1 of the 2 forms in IE, 0 of 2 in FireFox. When I tested the code shown above, 2 of 2 worked for both browsers.

I understand that SmartNavigation is supposed to do more - e.g. eliminate the "flash" when the page refreshes - but for just the task of maintaining scroll position it looks like the code you kindly translated above is the way to go. Thanks again.