请问怎样解决"服务器返回状态Internal Server Error" ?

runnery1984 2007-05-26 04:03:23

我运行以下的程序,有时候是可以正常运行的,但有时就提示 "服务器返回状态Internal Server Error" ,请问为什么?

客户端:

<html xmlns:v="http://www.eglic.com/">
<head>
<title>页面画线</title>
<meta name="ContentType" content="text/html" />
<meta name="CharSet" content="GB2312" />

<script type ="text/javascript" language ="javascript" >
var req; //定义变量，用来创建xmlhttprequest对象

function creatReq() // 创建xmlhttprequest,ajax开始
{
var url="ajaxServer.aspx"; //要请求的服务端地址
if(window.XMLHttpRequest) //非IE浏览器，用xmlhttprequest对象创建
{
req=new XMLHttpRequest();
}
else if(window.ActiveXObject) //IE浏览器用activexobject对象创建
{
req=new ActiveXObject("Microsoft.XMLHttp");
}

if(req) //成功创建xmlhttprequest
{
req.open("GET",url,true); //与服务端建立连接(请求方式post或get，地址,true表示异步)
req.onreadystatechange = callback; //指定回调函数
req.send(null); //发送请求
}
}

function callback() //回调函数，对服务端的响应处理，监视response状态
{
if(req.readystate==4) //请求状态为4表示成功
{
if(req.status==200) //http状态200表示OK
{

drawCanvas(); //所有状态成功，执行此函数，显示数据
}
else //http返回状态失败
{
alert("服务端返回状态" + req.statusText);
}
}
else //请求状态还没有成功，页面等待
{
document .getElementById ("myTime").innerHTML ="数据加载中";
}
}

setInterval('creatReq()',2000);

</script>

<script language="javascript">var Working=false;
var points = [];
var lastPoint = {x:0,y:0};

function drawCanvas()
{
var arr = eval(req.responseText);
var x1 = arr[0];
var y1 = arr[1];
if(!Working){
document.getElementById("show").style.display="none";
Working=true;
lastPoint.x = x1;
lastPoint.y = y1;
points.push( {x:x1,y:y1} );

}else{
var s='<v:line from="'+lastPoint.x+','+lastPoint.y+'" to="'+x1+','+y1+'" style="position:absolute;left:0px;top:0px;"></v:line>';
lastPoint.x = x1;
lastPoint.y = y1;
points.push( {x:x1,y:y1} );

var o=document.createElement(s);
document.body.insertAdjacentElement('BeforeEnd',o);
}
}
</script>

<style type="text/css">
v\:* {behavior:url(#default#VML);}
</style>
</head>
<body>
<div id="myTime"></div>
<input id="Button1" type="button" value="Get Time" onclick ="creatReq();"/>
<div id="show" style="border:5px solid #000;width:200px;height:30px;line-height:30px;text-align:center;display:none">
</div>
</body>
</html>

服务器端:
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Web.SessionState;

public partial class _Default : System.Web.UI.Page
{

Random a = new Random();
int t;
int d;

protected void Page_Load(object sender, EventArgs e)
{
System.Threading.Thread.Sleep(1000);

t = a.Next(0, 100); //从0到100的随机数
d = a.Next(0, 100); //从0到100的随机数

Response.Write(string.Format("[{0},{1}]", t, d));
Response.End();

}
}

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