ASP.NET手写AJAX

来源：互联网发布：知乎周刊怎么订阅编辑：程序博客网时间：2024/05/16 10:09

我写的一个例子
//ajax删除
function DelAttachment(ID)
{
if(confirm("确定要删除附件吗？"))
{
var url="DelAttachment.ashx?ID="+ID+"&rd="+Math.random();
CreateXmlHttp();
ajax_process(url,"spFile");
}
}
function ajax_process(url,id)
{
xmlHttp.open("GET", url, true);
xmlHttp.onreadystatechange = ajax_sumbitemployment;
xmlHttp.send(null);
function ajax_sumbitemployment()
{
if (xmlHttp.readyState == 4){
if(xmlHttp.status==200)
{
if(xmlHttp.responseText=="success")
{
alert("删除成功！");
$("spFile").outerHTML= "";
}
else
{
alert("删除失败！");
}
}
}
}
}
//创建Ajax对象
function CreateXmlHttp()
{
try { xmlHttp = new ActiveXObject("Msxml2.XMLHTTP"); }
catch (e) { try { xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); }
catch (e) { try { xmlHttp = new XMLHttpRequest(); }
catch (e) { xmlHttp = false; }}}
}
</script>
</HEAD>

<BODY>

</BODY>
</HTML>

//DelAttachment.ashx文件

using System;
using System.Web;

public class DelAttachment : IHttpHandler {

public void ProcessRequest (HttpContext context) {
context.Response.ContentType = "text/plain";
Table Bll = new Table();
string ID = context.Request.QueryString["ID"];
if (!String.IsNullOrEmpty(ID))
{
if (Bll.DelAttachment(int.Parse(ID))>=0)
{
context.Response.Write("success");
}
}
}

public bool IsReusable {
get {
return false;
}
}

}