软件开发培训班 >> 编程开发 >> ASPNET


Asp.net保持页面滚动条位置(页面提交后不变)

　　本文标签：滚动条,位置

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：
复制代码 代码如下:

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

复制代码 代码如下:

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：
复制代码 代码如下:

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：
复制代码 代码如下:

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 。