ajax无翻页刷新简单实例2
1,HTML页面：
<!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>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>微博样式1</title>
</head>
<script type="text/javascript">
var xmlHttp;
function createXMLHttpRequest()
{
if(window.ActiveXObject)
{
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
else if(window.XMLHttpRequest)
{
xmlHttp = new XMLHttpRequest();
}
}
function addNumber()
{
createXMLHttpRequest();
//var url= "AjaxMicrobloggingPaging.aspx?Num1="+document.getElementById("num1").value+"&Num2="+document.getElementById("num2").value;
var url= "Handler.ashx";
xmlHttp.open("GET",url,true);
xmlHttp.onreadystatechange=showResult;
xmlHttp.send(null);
}
function showResult()
{
if(xmlHttp.readyState==4)
{
if(xmlHttp.status==200)
{
document.getElementById("mlist").innerHTML=xmlHttp.responseText;
}
}
}
</script>
<body>
<div class="content" id="mlist"></div>
<input type="button" name="fdfds" value="计算" onclick="addNumber();" />
</body>
</html>
2，动态页面
<%@ WebHandler Language="C#" Class="Handler" %>
using System;
using System.Web;
using System.Text;
using System.Data;
public class Handler : IHttpHandler {
public void ProcessRequest (HttpContext context) {
context.Response.ContentType = "text/plain";
context.Response.Write(server_Side_Processing(5, 1));
}
public bool IsReusable {
get {
return false;
}
}
/// <summary>
///服务器端处理程序到数据库查询数据并生成xml档返回
/// </summary>
public string server_Side_Processing(int pageSize, int currentPage)
{
StringBuilder resultXML = new StringBuilder();
string str_xml;
DataSet ds;
DataAccess da;
int i;
resultXML.Append("<?xml version='1.0' encoding='gb2312'?>");
resultXML.Append("<ajax-response>\n");
resultXML.Append("<root>\n");
try
{
if (currentPage == 1)
{
str_xml = "select top " + pageSize + " * from tbMicroblog order by MicroblogID desc";
}
else
{
str_xml = "select top " + pageSize + " * from tbMicroblog MicroblogID not in (select top " + pageSize * (currentPage - 1) + " * from tbMicroblog order by MicroblogID desc) where order by MicroblogID desc";
}
da = new DataAccess();
ds = da.GetDataSetResult(str_xml, "xml_table");
if (ds != null)
{
for (i = 0; i < pageSize; i++)
{
if (ds.Tables[0].Rows[i] == null)
{
break;
}
resultXML.Append("<data>\n");
resultXML.Append("\t<MicroblogID>" + ds.Tables[0].Rows[i]["MicroblogID"].ToString() + "</MicroblogID>\n");
if (ds.Tables[0].Rows[i]["UserID"].ToString().Trim() != "")
{
resultXML.Append("\t<UserID>" + HttpUtility.UrlEncodeUnicode(ds.Tables[0].Rows[i]["UserID"].ToString().Trim()) + "</UserID>\n");
}
else
{
resultXML.Append("\t<UserID>#</UserID>\n");
}
if (ds.Tables[0].Rows[i]["Content"].ToString().Trim() != "")
{
resultXML.Append("\t<Content>" + HttpUtility.UrlEncodeUnicode(ds.Tables[0].Rows[i]["Content"].ToString().Trim()) + "</Content>\n");
}
else
{
resultXML.Append("\t<Content>#</Content>\n");
}
if (ds.Tables[0].Rows[i]["Pubdate"].ToString().Trim() != "")
{
resultXML.Append("\t<Pubdate>" + HttpUtility.UrlEncodeUnicode(ds.Tables[0].Rows[i]["Pubdate"].ToString().Trim()) + "</Pubdate>\n");
}
else
{
resultXML.Append("\t<Pubdate>#</Pubdate>\n");
}
resultXML.Append("</data>\n");
}
}
else
{
resultXML.Append("<data>\n");
resultXML.Append("\t<nodata>" + "No Data !" + "</nodata>\n");
resultXML.Append("</data>\n");
}
}
catch (Exception e)
{
Console.WriteLine("{0} Exception caught.", e);
}
resultXML.Append("</root>\n");
resultXML.Append("</ajax-response>");
return resultXML.ToString();
}
}
