保持页面中滚动条的位置,使得页面提交后滚动条还是在原来的位置

王朝other·作者佚名  2006-05-27
窄屏简体版  字體: |||超大  

一般来说很多的人在控制浏览器滚动条都是用Page.SmartNavigation = False,对于页面中DIV等等的滚动条控制,我在看了别人代码后,写了一个,仅供参考:

Public Shared Sub SaveDivScrollPosition(ByVal divIDArray As String, ByVal objPage As Page)

Dim saveScrollPosition As String

Dim i As Integer

Dim divID() As String

divID = divIDArray.Split(",")

For i = 0 To divID.Length - 1

objPage.RegisterHiddenField(divID(i) & "__SCROLLPOS", objPage.Request.Form(divID(i) & "__SCROLLPOS"))

saveScrollPosition = "<script language='javascript'>" _

& "function saveScrollPosition() {" _

& " if (document.all['" & divID(i) & "'] != undefined) {" _

& "document.forms[0]." & divID(i) & "__SCROLLPOS.value = " _

& "document.all['" & divID(i) & "'].scrollTop + ',' " _

& " + document.all['" & divID(i) & "'].scrollLeft;}}" _

& "if (document.all['" & divID(i) & "'] != undefined) {document.all['" & divID(i) & "'].onscroll=saveScrollPosition;}" _

& "</script>"

objPage.RegisterStartupScript("saveScroll" & divID(i), saveScrollPosition)

Next

End Sub

Public Shared Sub RestoreDivScrollPosition(ByVal divIDArray As String, ByVal objPage As Page)

Dim restoreScrollPosition As String

Dim setPositionFunction As String

Dim i As Integer

Dim divID() As String

divID = divIDArray.Split(",")

For i = 0 To divID.Length - 1

setPositionFunction = setPositionFunction & "SetScrollPosition('" & divID(i) & "');"

Next

restoreScrollPosition = "<script language='javascript'>" _

& setPositionFunction _

& "</script>"

objPage.RegisterStartupScript("restoreScroll", restoreScrollPosition)

End Sub

JAVASCRIPT:

function SetScrollPosition(divID){

var e;

var a;

var obj;

if (document.getElementById(divID)){

obj = eval('document.forms[0].' + divID + '__SCROLLPOS');

if (obj) {

e=eval('document.forms[0].' + divID + '__SCROLLPOS').value;

a=e.split(',');

document.getElementById(divID).scrollTop= a[0];

document.getElementById(divID).scrollLeft= a[1];

}

}

}

在页面后台调用的时候,写下如下的代码:

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

call SaveDivScrollPosition("div1,div2,div3",me)

call RestoreDivScrollPosition("div1,div2,div3",me)

End Sub

不好意思,这两个SUB可以写成一个,仅供参考。

 
 
 
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