您好我有一个表,我试图通过在单独的php页面中调用MySQL数据库来更新。这个单独的页面循环遍历结果集并通过一系列回声构建表。在主页面中,我试图将回显的内容插入到div中。
这一切都是由用户从下拉框中选择一个选项开始的。
这是单独的php页面。 (当我手动输入GET参数时它工作正常,它是两个页面之间的链接似乎不起作用)
tableGetter.php
<?PHP
$user_name = "rocketeermus_pr";
$password = "zuluhead2";
$database = "rocketeermus_pr";
$server = "pdb1.awardspace.com";
$db_handle = mysql_connect($server, $user_name, $password);
$db_found = mysql_select_db($database, $db_handle);
echo "Bonjour";
if (isset($_GET['composer'])){
echo "Helloooo";
if ($db_found) {
echo "SELECT * FROM catalogue WHERE Composer = '".mysql_escape_string($_GET['composer'])."';";
$SQL = "SELECT * FROM catalogue WHERE Composer = '".mysql_escape_string($_GET['composer'])."';";
$result = mysql_query($SQL);
setlocale(LC_MONETARY,"en_GB");
echo "<table class=\"sortable\" id=\"moder\" width=\"800\">";
echo "<th>TITLE</th><th>COMPOSER</th><th>VOICING</th><th>PRICE</th><th></th></tr>";
while ( $db_field = mysql_fetch_assoc($result) ) {
echo "Hi.";
echo "<tr><td>{$db_field['Title']}</td><td>{$db_field['Composer']}</td><td>{$db_field['Voicing']}</td><td>";
echo money_format("%n", $db_field['Price']);
echo "</td><td> <div class=\"product\"> <input value=\"{$db_field['Title']}\" class=\"product-title\" type=\"hidden\"> <input value=\"0.5\" class=\"product-weight\" type=\"hidden\"> <input value=\"{$db_field['NoVox']}\" class=\"googlecart-quantity\" type=\"hidden\"> <input value=\"{$db_field['Price']}\" class=\"product-price\" type=\"hidden\"> <div title=\"Add to cart\" role=\"button\" tabindex=\"0\" class=\"googlecart-add-button\"> </div> </div> </td></tr>";
}
echo "</table>";
mysql_close($db_handle);
} else {
print "Database NOT Found ";
mysql_close($db_handle);
}
}
?>
以下是主页中的重要内容:
使用Javascript:
function getdata()
{
var req = getXMLHTTP();
if (req)
{
//function to be called when state is changed
var queryString1 = "";
req.onreadystatechange = function()
{
//when state is completed i.e 4
if (req.readyState == 4)
{
var ajaxSearchResults1 = document.getElementById("table");
ajaxSearchResults1.innerHTML = req.responseText;
// only if http status is "OK"
if (req.status == 200)
{
var new1 = document.getElementById('composer').value;
queryString1 = "?composer=" + encodeURIComponent(new1);
console.log (queryString1);
}
else
{
alert("There was a problem while using XMLHTTP:\n" + req.statusText);
}
}
}
req.open("GET", "tableGetter.php" + queryString1, true);
req.send();
}
}
function getXMLHTTP() {
var xmlhttp;
if(window.XMLHttpRequest){ //For Firefox, Mozilla, Opera, and Safari
xmlhttp = new XMLHttpRequest();
}
else if (window.ActiveXObject){ //For ie
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
if (!xmlhttp){
xmlhttp=new ActiveXObject("Msxml2.XMLHTTP");
}
}
return xmlhttp;
}
HTML:
<div id="menus">
<table>
<tr>
<td><form action=""">
<select name="composer" id ="composer" onchange="getdata();">
<?php
$user_name = "***";
$password = "****";
$database = "****";
$server = "****.com";
$db_handle = mysql_connect($server, $user_name, $password);
$db_found = mysql_select_db($database, $db_handle);
if ($db_found) {
$SQL = "SELECT DISTINCT Composer FROM catalogue ORDER BY Composer";
$result = mysql_query($SQL);
setlocale(LC_MONETARY,"en_GB");
while ( $db_field = mysql_fetch_assoc($result) ) {
?>
<option id="composer" onchange="getdata();" value="<?php echo $db_field['Composer'];?>">
<?php
echo $db_field['Composer'];
?>
</option>
<?php
}
}
?>
</select>
</form></td>
</tr>
</table>
</div>
<div id="table">
<?php include("tableGetter.php"); ?>
</div>
主页面上的html工作正常,下拉菜单很好地填充了数据库中所有不同的作曲家名称。当选择菜单中的选项时,“table”div中回显的唯一内容是“Bonjour”。它不会超过if (isset($_GET['composer']))
页面中的tableGetter.php
。我打印出queryString1
函数中请求的getData()
变量(获取参数),并报告:?composer=Animuccia%2C%20Paulo
在手动加载页面时效果很好。它不会动态地工作!
有人知道这里发生了什么吗?
答案 0 :(得分:0)
在发送AJAX请求之前,您没有设置queryString1
。尝试重写getdata()
。
function getdata()
{
var req = getXMLHTTP();
if (req)
{
//function to be called when state is changed
req.onreadystatechange = function()
{
//when state is completed i.e 4
if (req.readyState == 4)
{
// only if http status is "OK"
if (req.status == 200)
{
var ajaxSearchResults1 = document.getElementById("table");
ajaxSearchResults1.innerHTML = req.responseText;
}
else
{
alert("There was a problem while using XMLHTTP:\n" + req.statusText);
}
}
}
var new1 = document.getElementById('composer').value;
var queryString1 = "?composer=" + encodeURIComponent(new1);
req.open("GET", "tableGetter.php" + queryString1, true);
req.send();
}
}