我试图在xml文件中搜索字符串值，然后在找到字符串值时附加到div。如果根本找不到，那么我需要在找不到搜索词的同一div中显示错误文本。
这基本上应该是一个搜索页面，它将搜索到的项目加载到div内容中。
目前我的内容正在加载正常。搜索到的术语如果找到，则从xml加载所有相应的div，但如果找不到搜索词，我就无法显示错误。
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<items xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<item>
<animal_id>1_1</animal_id>
<animal_title>Sparrow</animal_title>
<animal_generic>Birds 1</animal_generic>
<animal_category>Birds</animal_category>
<animal_code>a1</animal_code>
<animal_img>http://i.imgur.com/R0754lr.png</animal_img>
<animal_url>1_1_Animals1.html</animal_url>
</item>
<item>
<animal_id>1_2</animal_id>
<animal_title>Crow</animal_title>
<animal_generic>Birds 2</animal_generic>
<animal_category>Birds</animal_category>
<animal_code>b2</animal_code>
<animal_img>http://i.imgur.com/R0754lr.png</animal_img>
<animal_url>1_2_Animals2.html</animal_url>
</item>
<item>
<animal_id>1_3</animal_id>
<animal_title>Parrot</animal_title>
<animal_generic>Birds 3</animal_generic>
<animal_category>Birds</animal_category>
<animal_code>c3</animal_code>
<animal_img>http://i.imgur.com/R0754lr.png</animal_img>
<animal_url>1_3_Animals3.html</animal_url>
</item>
</items>
<div class="list-h">
</div>
var s_string = 'bird';
$.ajax({
url: 'https://dl.dropboxusercontent.com/u/27854284/Stuff/Online/XML_animals.xml', // name of file you want to parse
dataType: "xml",
success: function parse(xmlResponse){
$(xmlResponse).find("item").each(function() {
var pr_id = $(this).find("animal_id").text();
var p_title = $(this).find("animal_title").text();
var p_category = $(this).find("animal_category").text();
var p_code = $(this).find("animal_code").text();
var p_img = $(this).find("animal_img").text();
var p_url = $(this).find("animal_url").text();
var p_gen_name = $(this).find("animal_generic").text();
var p_xml_string = p_title + p_gen_name, results_string = '', error;
if(s_string)
var s_string2 = s_string.replace("%20"," ");
//console.log(p_xml_string + s_string2);
if(p_xml_string.toLowerCase().indexOf(s_string2) > -1){
//console.log("FOUND : " + p_title);
results_string = '<div class="item"><div class="item-h"><a class="item-anchor" href="' + p_url + '"><div class="item-image"><img class="item-image-first" src="' + p_img + '" alt=""><div class="item-meta"><h2 class="item-title">' + p_title + '</h2><span class="item-arrow"></span></div></div></a></div></div>';
found_string = true; //// KEEP VALUES = TRUE OR FALSE IN AN ARRAY...GLOBAL ARRAY, AND THEN SEARCH THAT ARRAY FOR TRUE. IF ALL FALSE, SHOW ERROR.
}
if(found_string){
$('.list-h').append(results_string);
$('<div id="error_div"></div>').text("found");
}
}); //xmlResponse .each function end.
}, error: function(){console.log('Error: Animals info xml could not be loaded.');}
});
// START OF NOT FOUND SEARCH SCRIPT
$(window).load(function(){
var error_found = $('#error_div').text(); console.log(error_found);
setTimeout(function(){
if(error_found != 'found'){
var results_string = '<center>Your Search Query "<b>' + $.url().param('q').replace("%20"," ") + '" was not found!</b> Maybe you entered an invalid search query.</center>';
$('.list-h').append(results_string); }
}, 0);
});
// END OF NOT FOUND SEARCH SCRIPT
这里的js是完整的XML网址：http://jsfiddle.net/mohitk117/B89Ms/
有人可以帮我解决这个问题吗？谢谢！
答案 0 :(得分：0)
我有点不确定所有内容是如何组合在一起的，因为javascript代码不是不言自明的。但是，你能从这里解决这个问题开始......？
if(s_string)
var s_string2 = s_string.replace("%20"," ");
//console.log(p_xml_string + s_string2);
if(p_xml_string.toLowerCase().indexOf(s_string2) > -1){
s_string2变量超出范围...
if(p_xml_string.toLowerCase().indexOf(s_string2) > -1){
你想在那里做什么？上面的表达式将始终求值为false，因为s_string2未定义。换句话说，无法在if块内进行任何处理
同样，这个变量被实例化并在同一时间处理......
if(s_string)
var s_string2 = s_string.replace("%20"," "); //<--- This variable's lifecycle ends here
并且，在您解决上面的变量问题之前，此表达式始终为false
if(p_xml_string.toLowerCase().indexOf(s_string2) > -1)
答案 1 :(得分：0)
某些更改可能会解决您的问题
在html
<div id="error_div"></div>
更改以下代码
if (s_string) var s_string2 = s_string.replace("%20", " ");
//console.log(p_xml_string + s_string2);
if (p_xml_string.toLowerCase().indexOf(s_string2) > -1) {
到
var s_string2='';
if (s_string) s_string2 = s_string.replace("%20", " ");
if (s_string2 && p_xml_string.toLowerCase().indexOf(s_string2) > -1) {
更改found_string代码，
if (found_string) {
$('.list-h').append(results_string);
$('#error_div').text("found");
}
可选择为error_div
#error_div {
color:red;
}
已更新 success代码
var found_string = false; // define found_string globally
$(xmlResponse).find("item").each(function () {
var pr_id = $(this).find("animal_id").text();
var p_title = $(this).find("animal_title").text();
var p_category = $(this).find("animal_category").text();
var p_code = $(this).find("animal_code").text();
var p_img = $(this).find("animal_img").text();
var p_url = $(this).find("animal_url").text();
var p_gen_name = $(this).find("animal_generic").text();
var p_xml_string = p_title + p_gen_name,
results_string = '',
error;
var s_string2 = '';
if (s_string) s_string2 = s_string.replace("%20", " ");
if (s_string2 && p_xml_string.toLowerCase().indexOf(s_string2) > -1) {
//console.log("FOUND : " + p_title);
results_string = '<div class="item"><div class="item-h"><a class="item-anchor" href="' + p_url + '"><div class="item-image"><img class="item-image-first" src="' + p_img + '" alt=""><div class="item-meta"><h2 class="item-title">' + p_title + '</h2><span class="item-arrow"></span></div></div></a></div></div>';
found_string = true; //// KEEP VALUES = TRUE OR FALSE IN AN ARRAY...GLOBAL ARRAY, AND THEN SEARCH THAT ARRAY FOR TRUE. IF ALL FALSE, SHOW ERROR.
}
if (found_string) { // if found then append in list
$('.list-h').append(results_string);
}
}); //xmlResponse .each function end.
if (found_string) { // if found then empty error div
$('#error_div').text("");
} else { // else show error text or not found
$('#error_div').text("not found");
}
更新了 Found Demo 和 Not Found Demo