在开发B/S系统的时候，由于页面的刷新问题，经常会导致页面自动滚动到开始。然而有时候，我们需要页面在刷新后返回到页面前的位置。为了解决这个问题，我写了一个方法，大家可以参阅，其实也不是一种高明的做法，但至少解决了一些问题。
原理就是在你需要的位置添加一个对象控件，让页面刷新后定位到此控件的位置，使用了scrollIntoView方法。
public void ScrollToObject(string str_Ctl_Name,Page page)
{
if(!page.IsStartupScriptRegistered ("ScrollObject"))
{
page.RegisterStartupScript("msgScrollObject"," <script>document.forms(0)."+str_Ctl_Name+".scrollIntoView();document.forms(0)."+str_Ctl_Name+".focus(); </script>");
}
}
注：ScrollToObject：方法名
str_Ctl_Name：控件名
例子：ScrollToObject(Button1,Page);
对于DataGrid的的定位问题，你可以使用HTML 中锚点的方式来解决，具体的操作可以参阅HTML手册来学习锚点是怎样运用的，这里就不再多谈了
以前的解决方法
原文地址：http://www.cnblogs.com/hbzxf/archive/2004/08/10/31916.aspx
无意中从网上查到的scrollPage Class 原文如下
Scroll Page
A while back, I saw a presentation on how to maintain your scroll position after a postback. I decided to create a quick page class you can derive from which will allow you to always maintain your scroll position. Enjoy! (Text version: http://scottwater.com/code/ScrollPage.cs.txt)
1: using System;
2: using System.IO;
3: using System.Text;
4: using System.Text.RegularExpressions;
5: using System.Web.UI;
6:
7: namespace ScottWater.Pages
8: {
9: /**//// <summary>
10: /**//// Summary description for ScrollPage.
11: /**//// </summary>
12: public class ScrollPage : System.Web.UI.Page
13: {
14: public ScrollPage()
15: {
16:
17: }
18:
19: private bool _useScrollPersistence = true;
20: /**//// <summary>
21: /**//// There could be PostBack senarios where we do not want to remember the scroll position. Set this property to false
22: /**//// if you would like the page to forget the current scroll position
23: /**//// </summary>
24: public bool UseScrollPersistence
25: {
26: get {return this._useScrollPersistence;}
27: set {this._useScrollPersistence = value;}
28: }
29:
30: private string _bodyID;
31: /**//// <summary>
32: /**//// Some pages might already have the ID attribute set for the body tag. Setting this property will not render the ID or change
33: /**//// the existing value. It will simply update the javascript written out to the browser.
34: /**//// </summary>
35: public string BodyID
36: {
37: get {return this._bodyID;}
38: set {this._bodyID = value;}
39: }
40:
41:
42: //Last chance. Do we want to maintain the current scroll position
43: protected override void OnPreRender(EventArgs e)
44: {
45: if(UseScrollPersistence)
46: {
47: RetainScrollPosition();
48: }
49: base.OnPreRender (e);
50: }
51:
52: protected override void Render(HtmlTextWriter writer)
53: {
54: //No need processing the HTML if the user does not want to maintain scroll position or already has
55: //set the body ID value
56: if(UseScrollPersistence && BodyID == null)
57: {
58: TextWriter tempWriter = new StringWriter();
59: base.Render(new HtmlTextWriter(tempWriter));
60: writer.Write(Regex.Replace(tempWriter.ToString(),"<body","<body id="thebody" ",RegexOptions.IgnoreCase));
61: }
62: else
63: {
64: base.Render(writer);
65: }
66: }
67:
68: private static string saveScrollPosition = "<script language='javascript'>function saveScrollPosition() {{document.forms[0].__SCROLLPOS.value = {0}.scrollTop;}}{0}.onscroll=saveScrollPosition;</script>";
69: private static string setScrollPosition = "<script language='javascript'>function setScrollPosition() {{{0}.scrollTop ="{1}";}}{0}.onload=setScrollPosition;</script>";
70:
71: //Write out javascript and hidden field
72: private void RetainScrollPosition()
73: {
74: RegisterHiddenField("__SCROLLPOS", "0");
75: string __bodyID = BodyID == null ? "thebody" : BodyID;
76: RegisterStartupScript("saveScroll", string.Format(saveScrollPosition,__bodyID));
77:
78: if(Page.IsPostBack)
79: {
80: RegisterStartupScript("setScroll", string.Format(setScrollPosition,__bodyID, Request.Form["__SCROLLPOS"]));
81: }
82: }
83: }
84: }
