我是网络编程新手。我在这里使用 ajax 时遇到问题，我正在读取返回的 json beig。要求是使用 Internet Explorer 浏览器，所以我在这里真的别无选择，只能使用它。我的问题是该功能未成功执行。我不太确定为什么，因为即使是错误也没有显示任何内容，所以我应该如何从这里开始。这段代码是由我的一位刚刚离开并辞职的同事提供的，现在我最终接受了他的工作。
下面是我的 HTML 代码：
<!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" xml:lang="en" lang="en">
<head>
<title>ACES Wallboard</title>
<link href="StyleSheet.css" rel="Stylesheet" type="text/css" />
<script type="text/javascript" src="Scripts/jquery-1.7.2.min.js"></script>
<script type="text/javascript">
<!--
//var obj = jQuery.parseJSON('{"key": [{ "name": "ciq" },{ "name": "lwt" }],"value": [{ "ciq": "3", "lwt": "12" }]}');
//window.onload = function() {
//while (true) {
//ajax request
//for (var i = 0; i < obj.key.length; i++) {
// jQuery("#" + obj.key[i].name).html(obj.value[0][obj.key[i].name]);
//}
//sleep
//}
//}
window.onload = function () {
function errorAlert(e, jxr)
{
alert("Your request is not successful. " + jxr);
}
jQuery.ajax(
{
type: "POST",
async: true,
url: 'WallboardHandler.ashx',
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (obj) {
for (var i = 0; i < obj.key.length; i++) {
jQuery("#" + obj.key[i].name).html(obj.value[0][obj.key[i].name]);
}
}
error: errorAlert
});
};
//-->
</script>
</head>
<body>
<div>
<div class="panelstyle">
<div class="ciqrowstyle">Call in Queue: <span id="ciq"> </span> Calls</div>
<div class="lwtrowstyle">Longest Waiting Time: <span id="lwt"> </span></div>
<div>
<table style="border:5px solid black;font-family:Tahoma;font-size:50px;color:black" width="100%">
<tr style="background-color:SteelBlue;font-weight:bold;color:White;">
<td class="gridheader"> </td>
<td class="gridheader">Avail</td>
<td class="gridheader">Unavail</td>
<td class="gridheader">Eng</td>
<td class="gridheader">Other</td>
</tr>
<tr>
<td class="rowstyle">HQ</td>
<td id="11" class="rowstyle"> </td>
<td id="12" class="rowstyle"> </td>
<td id="13" class="rowstyle"> </td>
<td id="14" class="rowstyle"> </td>
</tr>
<tr>
<td class="alternatingrowstyle">CDA</td>
<td id="21" class="alternatingrowstyle"> </td>
<td id="22" class="alternatingrowstyle"> </td>
<td id="23" class="alternatingrowstyle"> </td>
<td id="24" class="alternatingrowstyle"> </td>
</tr>
<tr>
<td class="rowstyle">Div 1</td>
<td id="31" class="rowstyle"> </td>
<td id="32" class="rowstyle"> </td>
<td id="33" class="rowstyle"> </td>
<td id="34" class="rowstyle"> </td>
</tr>
<tr>
<td class="alternatingrowstyle">Div 2</td>
<td id="41" class="alternatingrowstyle"> </td>
<td id="42" class="alternatingrowstyle"> </td>
<td id="43" class="alternatingrowstyle"> </td>
<td id="44" class="alternatingrowstyle"> </td>
</tr>
<tr>
<td class="rowstyle">Div 3</td>
<td id="51" class="rowstyle"> </td>
<td id="52" class="rowstyle"> </td>
<td id="53" class="rowstyle"> </td>
<td id="54" class="rowstyle"> </td>
</tr>
<tr>
<td class="alternatingrowstyle">Div 4</td>
<td id="61" class="alternatingrowstyle"> </td>
<td id="62" class="alternatingrowstyle"> </td>
<td id="63" class="alternatingrowstyle"> </td>
<td id="64" class="alternatingrowstyle"> </td>
</tr>
</table>
</div>
<div class="dtrowstyle">Date: <span id="timestamp"> </span></div>
</div>
</div>
</body>
</html>
下面是我的 WallboardHander.cs 的代码，但我不知道为什么在 url 上被称为 ashx？
/*
* Copyright (C) 2009 CanaPlus Consulting Pte Ltd
*/
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Web;
using Com.Canaplus.Commons.Config;
using Com.Canaplus.Commons.Logging;
using Newtonsoft.Json;
namespace Com.Canaplus
{
public class WallboardHandler : IHttpHandler
{
private static ILogger _logger;
protected string GetConnectionString()
{
return ConfigurationManager.GetInstance().GetConfiguration().GetConnectionString("SS1CMSDBC1");
}
protected static ILogger GetLogger()
{
return _logger ?? (_logger = LoggerFactory.GetLogger(typeof (WallboardHandler).FullName));
}
public bool IsReusable
{
// Return false in case your Managed Handler cannot be reused for another request.
// Usually this would be false in case you have some state information preserved per request.
get { return false; }
}
public void ProcessRequest(HttpContext context)
{
var data = new Dictionary<string, ICollection<JsonType>>();
var keys = new LinkedList<JsonType>();
data.Add("key", keys);
var values = new LinkedList<JsonType>();
data.Add("value", values);
var value = new ValueType();
values.AddLast(value);
try
{
using (var conn = new SqlConnection(GetConnectionString()))
{
conn.Open();
var spGetTotalCallInQueue = new SqlCommand("sp_getToTalCallInQueue", conn)
{CommandType = CommandType.StoredProcedure};
var o = new KeyType {name = "ciq"};
keys.AddLast(o);
value.ciq = spGetTotalCallInQueue.ExecuteScalar().ToString();
var spGetWallBoardMatrixTb = new SqlCommand("sp_getWallBoardMatrixTB", conn)
{CommandType = CommandType.StoredProcedure};
var spGetMaxLongestWaitingTime = new SqlCommand("sp_getMaxLongestWaitingTime", conn)
{CommandType = CommandType.StoredProcedure};
o = new KeyType { name = "lwt" };
keys.AddLast(o);
value.lwt = spGetMaxLongestWaitingTime.ExecuteScalar().ToString();
var spGetCurrentDateTime = new SqlCommand("sp_getCurrentDateTime", conn)
{CommandType = CommandType.StoredProcedure};
o = new KeyType { name = "timestamp" };
keys.AddLast(o);
value.timestamp = spGetCurrentDateTime.ExecuteScalar().ToString();
}
}
catch(Exception e)
{
GetLogger().Error(e);
}
context.Response.ContentType = "text/json";
context.Response.Write(JsonConvert.SerializeObject(data, Formatting.Indented));
}
}
}
如果你能帮助我，我真的很感激......