瀏覽器窗口滾動加載數(shù)據(jù)采用異步形式從后臺加載數(shù)據(jù)
2024-07-10 12:44:04
供稿：網(wǎng)友
以下滾動效果為在網(wǎng)上查找。
在滾動條距頂部距離(頁面超出窗口的高度)時采用異步形式從后臺加載數(shù)據(jù)
代碼如下:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="ScrollLoadData.aspx.cs" Inherits="WebApplication1.ScrollLoadData" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>滾動加載數(shù)據(jù)庫數(shù)據(jù)</title>
<script src="../Scripts/jquery-1.4.1-vsdoc.js" type="text/javascript"></script>
<script src="../Scripts/jquery-1.4.1.js" type="text/javascript"></script>
<script src="../Scripts/jquery-1.4.1.min.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function () {
var range = 50; //距下邊界長度/單位px
var elemt = 500; //插入元素高度/單位px
var maxnum = 20; //設(shè)置加載最多次數(shù)
var num = 1;
var totalheight = 0;
var main = $("#content"); //主體元素
$(window).scroll(function(){
var srollPos = $(window).scrollTop(); //滾動條距頂部距離(頁面超出窗口的高度)
totalheight = parseFloat($(window).height()) + parseFloat(srollPos);
if (($(document).height() - range) <= totalheight && num != maxnum) {
$.ajax({
url: "../demo/HandlerDemo.ashx",//顯示數(shù)據(jù)的方法頁
type: "GET",
data: "name=json",
dataType: "json",
//cache: false,
success: function (data) {
data = eval(data);
var varHtml = "";
varHtml = "<ul>"
$(data).each(function (i) {
varHtml += "<li>" + data[i].ID + ":" + data[i].Event + "</li>"; //ID 和Event為數(shù)據(jù)庫映射的字段
});
varHtml += "</ul>";
main.append("<div style='border:0px solid tomato;margin-top:20px;color:#ac" + (num % 20) + (num % 20) + ";height:" + elemt + "' >hello world" + srollPos + "<br />"+varHtml + "---" + num + "</div>");
},
error: function () {
alert("error");
}
});
num++;
}
});
});
</script>
<style type="text/css">
li
{
list-style-type:none;
float:left;
padding-left:20px;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<div id="content" style="height:960px">
<div id="follow">this is a scroll test;<br/> 頁面下拉自動加載內(nèi)容</div>
<div style='border:1px solid tomato;margin-top:20px;color:#ac1;height:800' >hello world test DIV</div>
</div>
</form>
</body>
</html>
