我正在尝试加载带有选项的图表，以便在选定日期之间显示数据。当我在我的网页上运行它时，我收到错误＆＃34;表没有列。＆＃34; 1，但是当我将IF语句（buildchris）设置为NOT EQUAL to maincampus时，图表将加载。我相信它与xmlhttp .send有关，变量似乎不是通过POST发送的（buildingchartchris）。有没有人有这个问题的解决方案？
buildchris.php
<?php
session_start(); // Start the session.
// If no session value is present, redirect the user:
// Also validate the HTTP_USER_AGENT!
if (!isset($_SESSION['agent']) OR ($_SESSION['agent'] != md5($_SERVER['HTTP_USER_AGENT'])) OR ($_SESSION['admin_level'] < 1) )
{
// Need the functions:
require ('includes/login_functions.inc.php');
redirect_user('index.php');
}
require("includes/mysqli_connect.php");
$p = $_POST['purpose'];
if($p == "maincampus")
{
$sm = $_POST['sm'];
$sd = $_POST['sd'];
$sy = $_POST['sy'];
$em = $_POST['em'];
$ed = $_POST['ed'];
$ey = $_POST['ey'];
//$start_date = Date("Y-m-d", mktime(0, 0, 0, $sm, $sd, $sy));
//$end_date = Date("Y-m-d", mktime(0, 0, 0, $em, $ed, $ey));
$start_date= "2014-01-01";
$end_date= "2016-01-01";
$result = $dbc->query('SELECT SUM(actual_hours) as act_hours, Buildings.bld_name, Buildings.bld_location FROM work_orders INNER JOIN Buildings ON work_orders.building = Buildings.bld_no WHERE work_orders.actual_completion_date > "'.$start_date.'" AND work_orders.actual_completion_date < "'.$end_date.'" AND Buildings.bld_location ="0" AND Buildings.bld_name <> "N/A" AND work_orders.actual_completion_date IS NOT NULL GROUP BY Buildings.bld_name');
$rows = array();
$table = array();
$table['cols'] = array(
array('label' => 'Building', 'type' => 'string'),
array('label' => 'Hours', 'type' => 'number')
);
/* Extract the information from $result */
foreach($result as $r) {
$temp = array();
// The following line will be used to slice the Pie chart
$temp[] = array('v' => (string) $r['bld_name']);
// Values of the each slice
$temp[] = array('v' => (int) $r['act_hours']);
$rows[] = array('c' => $temp);
}
$table['rows'] = $rows;
// convert data into JSON format
$jsonTable = json_encode($table);
echo $jsonTable;
}
?>
buildingchartchris.php
<?php
session_start(); // Start the session.
// If no session value is present, redirect the user:
// Also validate the HTTP_USER_AGENT!
if (!isset($_SESSION['agent']) OR ($_SESSION['agent'] != md5($_SERVER['HTTP_USER_AGENT'])) OR ($_SESSION['admin_level'] < 1) )
{
// Need the functions:
require ('includes/login_functions.inc.php');
redirect_user('index.php');
}
require("includes/mysqli_connect.php");
$page_title = 'Dashboard';
include ('includes/header.html');
?>
<html>
<head>
<title>Dashboard</title>
<link rel="icon" href="images/NKU.png" type="image/png" sizes="16x16">
<link rel="stylesheet" href="includes/as.css" type="text/css" media="screen" />
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js?libraries=geometry"></script>
<script src="http://maps.google.com/maps/api/js"></script>
<script>
<!--
//hides or shows the table given by nm
function hide_table(nm)
{
// alert(is_fullscreen);
var table_selector = "#table_" + nm;
$(table_selector).toggle();
//table_width = (table_width == 24)? 35:24;
//$("#iframeholder").animate({width: table_width + "%"});
}
// -->
</script> </head>
<div id="content">
<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
<!--Load the Ajax API-->
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
<script type="text/javascript">
// Set a callback to run when the Google Visualization API is loaded.
// google.setOnLoadCallback(drawChart);
function drawChart() {
var maincamp_sm, maincamp_sd, maincamp_sy, maincamp_em, maincamp_ed, maincamp_ey;
if( document.getElementById("maincamp_dates_quarter").checked )
{
var maincamp_q = document.getElementById("maincamp_quarter").value;
maincamp_ey = Number(document.getElementById("maincamp_quarter_year").value);
maincamp_sy = maincamp_ey;
if( maincamp_q == 0 )
{
maincamp_sm = 7;
maincamp_sd = 1;
maincamp_em = 6;
maincamp_ed = 30;
maincamp_ey = maincamp_ey + 1;
}
else if( maincamp_q == 1)
{
maincamp_sm = 7;
maincamp_sd = 1;
maincamp_em = 9;
maincamp_ed = 30;
}
else if( maincamp_q == 2 )
{
maincamp_sm = 10;
maincamp_sd = 1;
maincamp_em = 12;
maincamp_ed = 31;
}
else if( maincamp_q == 3 )
{
maincamp_sm = 1;
maincamp_sd = 1;
maincamp_em = 3;
maincamp_ed = 31;
maincamp_ey = maincamp_ey + 1;
maincamp_sy = maincamp_sy + 1;
}
else if( maincamp_q == 4 )
{
maincamp_sm = 4;
maincamp_sd = 1;
maincamp_em = 6;
maincamp_ed = 30;
maincamp_ey = maincamp_ey + 1;
maincamp_sy = maincamp_sy + 1;
}
}
else
{
maincamp_sm = document.getElementById("maincamp_start_month").value;
maincamp_sd = document.getElementById("maincamp_start_day").value;
maincamp_sy = document.getElementById("maincamp_start_year").value;
maincamp_em = document.getElementById("maincamp_end_month").value;
maincamp_ed = document.getElementById("maincamp_end_day").value;
maincamp_ey = document.getElementById("maincamp_end_year").value;
}
if(!( (maincamp_ey < maincamp_sy) || ( (maincamp_em < maincamp_sm) && (maincamp_ey == maincamp_sy) ) || ( (maincamp_ed < maincamp_sd) && (maincamp_em == maincamp_sm) && (maincamp_ey == maincamp_sy) ) ))
{
var xmlhttp;
xmlhttp = window.XMLHttpRequest ? new XMLHttpRequest() : new ActiveXObject("Microsoft.XMLHTTP");
xmlhttp.onreadystatechange = function()//Function called when there is a change of state for the server
{ //request
if (xmlhttp.readyState == 4 && xmlhttp.status == 200)//when request is complete and no issues
{
//var str = xmlhttp.responseText;
var jsonData = $.ajax({
url: "buildchris.php",
type: "POST",
dataType: "json", // type of data we're expecting from server
async: false // make true to avoid waiting for the request to be complete
});
// Create our data table out of JSON data loaded from server.
var data = new google.visualization.DataTable(jsonData.responseText);
var options = {
title: 'Labor Hours for Main Campus',
is3D: 'true',
width: 1200,
height: 2000,
chartArea:{width:"40%"},
bar: {groupWidth: "50%"}
};
var maincamp_view = new google.visualization.DataView(data);
// Instantiate and draw our chart, passing in some options.
// Do not forget to check your div ID
var chart = new google.visualization.BarChart(document.getElementById('chart_div'));
chart.draw(maincamp_view, options);
}
};
xmlhttp.open("POST","buildchris.php",true);
xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xmlhttp.send("purpose=maincampus&sm=" + maincamp_sm + "&sd=" + maincamp_sd + "&sy=" + maincamp_sy + "&em=" + maincamp_em + "&ed=" + maincamp_ed + "&ey=" + maincamp_ey);
}
else
{
alert("Your end date cannot be before the start date.");
}
}
google.load('visualization', '1', {'packages':['corechart']});
function cursor_hand(x)
{
x.style.cursor = "pointer";
}
function cursor_default(x)
{
x.style.cursor = "default";
}
function hide_element(nm)
{
var table_selector = "#" + nm;
$(nm).toggle();
}
</script>
<body>
<p onclick = "hide_element(operational_effectiveness_div);" style = "text-decoration: underline; font-size:x-large; font-weight:bold;" onmouseover="cursor_hand(this)" onmouseout="cursor_default(this)">Operational Effectiveness Reports</p><br>
<div id = "operational_effectiveness_div" >
<p onclick = "hide_element(maincamp_div);" style = "text-indent: 15px; text-decoration: underline;" onmouseover="cursor_hand(this)" onmouseout="cursor_default(this)">Show Total Labor Hours for Main Campus 2015-16</p><br>
<div id = "maincamp_div" style = "display:table;">
<fieldset style = "width: 800px; margin:auto; margin-left: 200px;"><legend><input type = "radio" id = "maincamp_dates_quarter" name = "maincamp_dates" value = "1" checked> Report by quarter </legend>
<p><select id = "maincamp_quarter">
<option value = 0 selected>All Quarters</option>
<option value = 1>Q1</option>
<option value = 2>Q2</option>
<option value = 3>Q3</option>
<option value = 4>Q4</option>
</select>
<input type = "number" id = "maincamp_quarter_year" min = "2015" value = "2015"></p>
</fieldset><br>
<fieldset style = "width: 800px; margin:auto; margin-left: 200px;"><legend><input type = "radio" id = "maincamp_dates_range" name = "maincamp_dates" value = "2"> Custom date range </legend>
<p>Start date (mm-dd-yyyy): <input type = "number" id = "maincamp_start_month" min = "1" max = "12" value = "1"><input type = "number" id = "maincamp_start_day" min = "1" max = "31" value = "1"><input type = "number" id = "maincamp_start_year" min = "2015" value = "2015"></p>
<p>End date (mm-dd-yyyy): <input type = "number" id = "maincamp_end_month" min = "1" max = "12" value = "1"><input type = "number" id = "maincamp_end_day" min = "1" max = "31" value = "1"><input type = "number" id = "maincamp_end_year" min = "2015" value = "2016"></p>
</fieldset>
<br>
<p onclick = "drawChart()" style = "border: thin solid black; padding: 2px; width: 95px; margin-left: 550px;" onmouseover="cursor_hand(this)" onmouseout="cursor_default(this)">Generate report</p>
<div id="chart_div" style="width: 1000px; text-indent: 50px;"></div>
</div>
</div>
</body>
</html>
<?php
//Release the used resources
mysqli_close($dbc);
include ('includes/footer.html');
?>