XMLhttp学习应用
Client.htm页面代码如下:
<!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>
<title>客户端</title>
<script type="text/javascript">
var XmlHttp = new ActiveXObject("Microsoft.XMLhttp");
function sendAJAX()
{
XmlHttp.Open("POST","receive.aspx",true);
XmlHttp.send(null);
XmlHttp.onreadystatechange=ServerProcess;
}
function ServerProcess()
{
if (XmlHttp.readystate==4 || XmlHttp.readystate=='complete')
{
document.getElementById('nameList').innerHTML =XmlHttp.responsetext;
}
}
setInterval('sendAJAX()',1000);
</script>
</head>
<body>
<div id="nameList"></div>
</body>
</html>
Receive.aspx CodeBehind代码:
protected void Page_Load(object sender, EventArgs e)
{
PerformanceCounter myMemory = new PerformanceCounter();
myMemory.CategoryName = "Memory";
myMemory.CounterName = "Available KBytes";
string txtResult = "-->当前可用内存：" +myMemory.NextValue().ToString() + "KB";
Response.Write(DateTime.Now.ToLongTimeString() + txtResult);
}
<!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> <title>客户端</title> <script type="text/javascript">
var XmlHttp = new ActiveXObject("Microsoft.XMLhttp"); function sendAJAX() {
XmlHttp.Open("POST","receive.aspx",true); XmlHttp.send(null); XmlHttp.onreadystatechange=ServerProcess; } function ServerProcess() { if (XmlHttp.readystate==4 || XmlHttp.readystate=='complete') { document.getElementById('nameList').innerHTML =XmlHttp.responsetext; } } setInterval('sendAJAX()',1000); </script> </head> <body> <div id="nameList"></div> </body></html>Receive.aspx CodeBehind代码:
protected void Page_Load(object sender, EventArgs e) { PerformanceCounter myMemory = new PerformanceCounter(); myMemory.CategoryName = "Memory"; myMemory.CounterName = "Available KBytes"; string txtResult = "-->当前可用内存：" +myMemory.NextValue().ToString() + "KB"; Response.Write(DateTime.Now.ToLongTimeString() + txtResult); }
