当前位置:编程学习 > C#/ASP.NET >>

提交页面的定位--scrollIntoView的用法

答案:提交页面定位问题一直骚扰我,比如我们在DataGrid外面加了来使DataGrid在一定区域内呈现,这样如果把滚动条拉到底部的时候点击修改(或者修改后点击更新,取消)页面重新加载的时候都会把滚动条拉到页面最上面部分 ,特此我将下面知识共享一下:
object.scrollIntoView( [bAlignToTop])

Parameters

bAlignToTop Optional. Boolean that specifies one of the following values:
true Default. Scrolls the object so that top of the object is visible at the top of the window.
false Scrolls the object so that the bottom of the object is visible at the bottom of the window.

Return Value

No return value.

Remarks

The scrollIntoView method is useful for immediately showing the user the result of some action without requiring the user to manually scroll through the document to find the result.

Depending on the size of the given object and the current window, this method might not be able to put the item at the very top or very bottom, but will position the object as close to the requested position as possible.

Example

This example uses the scrollIntoView method to underline the content of the document's fifth paragraph and scroll it into view at the top of the window.

HideExample

  var coll = document.all.tags("P");
if (coll.length >= 5)
{
coll(4).style.textDecoration = "underline";
coll(4).scrollIntoView(true);
}

Standards Information

There is no public standard that applies to this method.

Applies To

INPUT type=ra...
Platform Version
Win16: 4.0
Win32: 4.0
Windows CE: 4.0
Unix: 4.0
Mac: 4.0
A, ADDRESS, APPLET, AREA, B, BIG, BLOCKQUOTE, BR, BUTTON, CAPTION, CENTER, CITE, CODE, COL, COLGROUP, COMMENT, controlRange, CUSTOM, DD, DFN, DIR, DIV, DL, DT, EM, EMBED, FIELDSET, FONT, FORM, hn, HR, I, IFRAME, IMG, INPUT type=button, INPUT type=checkbox, INPUT type=file, INPUT type=image, INPUT type=password, INPUT type=radio, INPUT type=reset, INPUT type=submit, INPUT type=text, KBD, LABEL, LEGEND, LI, LISTING, MAP, MARQUEE, MENU, NOBR, OBJECT, OL, P, PLAINTEXT, PRE, S, SAMP, SELECT, SMALL, SPAN, STRIKE, STRONG, SUB, SUP, TABLE, TBODY, TD, TEXTAREA, TextRange, TFOOT, TH, THEAD, TR, TT, U, UL, VAR, WBR, XMP
Move the mouse pointer over an element in the Applies To list to display availability information for the listed platforms.

二、在.Net中的应用
1、定位指定控件
/// <summary>
/// 定位txtCode控件
/// </summary>
private void Scroll()
{
string s="<script>function window.onload(){document.all('"+this.txtCode.ClientID+"').scrollIntoView();}</script>";
Page.RegisterStartupScript("",s);
}

2、定位指定DataGrid列
<div style="BORDER:0px;PADDING:0px;MARGIN:0px;OVERFLOW:scroll;WIDTH:600px;HEIGHT:200px" align="center">

现在给出一种简单的办法(其他的一些利用锚点等办法都比较复杂)
CopyRight © 2012 站长网 编程知识问答 www.zzzyk.com All Rights Reserved
部份技术文章来自网络,