提交頁面的定位--scrollIntoView的用法

更新時間：2007年03月07日 00:00:00 作者：

提交頁面定位問題一直騷擾我，比如我們在DataGrid外面加了來使DataGrid在一定區(qū)域內(nèi)呈現(xiàn)，這樣如果把滾動條拉到底部的時候點擊修改（或者修改后點擊更新，取消）頁面重新加載的時候都會把滾動條拉到頁面最上面部分，特此我將下面知識共享一下:

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

Version data is listed when the mouse hovers over a link, or the link has focus.
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中的應用
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

現(xiàn)在給出一種簡單的辦法（其他的一些利用錨點等辦法都比較復雜）

private void Scroll(int index)

{

string s="<script>function window.onload(){document.all('"+this.DataGrid1.ClientID+"').rows["+index+"].scrollIntoView();}</script>";

Page.RegisterStartupScript("",s);

}

寫了一個方法，其中DataGrid1換成自己的DataGrid的ID，這個方法傳遞進去的參數(shù)就是行號，也就是e.Item.ItemIndex。
比如在編輯操作的時候會寫this.DataGrid1.EditItemIndex=e.Item.ItemIndex;
在此語句的以前加入Scroll(e.Item.ItemIndex);就可以了
同樣在更新操作的時候寫為Scroll(e.Item.ItemIndex);this.DataGrid1.EditItemIndex=-1;綁定;