使用JavaScript搜索XML并在表中显示结果

Question

For my course, I have been asked to create a html page that has the functionality of allowing a user to enter the first name of a contact, which onsubmit, loads an xml file I previously created, loops through the contacts until it matches the first name entered by the user, and displays the contact information, except the email address, on the same page, in a table with headings and a <h1> displaying The contact details are:. 对于我的课程，我被要求创建一个html页面，其功能是允许用户输入联系人的第一个名称，在onsubmit上加载我之前创建的xml文件，循环通过联系人，直到它与第一个匹配用户输入的名称，并在同一页面上，带有标题的表格中显示联系人信息（电子邮件地址除外），并显示<h1>联系人详细信息： If there is no match, there should be a <h2> that says The contact does not exist. 如果没有匹配，则应该有<h2>表示联系人不存在。

The following is my XML file: 以下是我的XML文件：

<?xml version="1.0" encoding="ISO-8859-1"?>
<?xml-stylesheet type="text/xsl" href="Contact.xsl" ?>
<!DOCTYPE contact SYSTEM "contact.dtd">
<contact>
    <person>
        <name>
            <firstname>Bob</firstname>
            <lastname>Jones</lastname>
        </name>
        <phone>(02)44 42 45 63</phone>
        <address>
            <street>34 Highway Road</street>
            <city>Grovedale</city>
            <state>NSW</state>
            <postcode>3228</postcode>
            <email>bob.jones@email.com</email>
        </address>
    </person>
    <person>
        <name>
            <firstname>Gary</firstname>
            <lastname>Williams</lastname>
        </name>
        <phone>(02)44 41 87 56</phone>
        <address>
            <street>223 Yarra Avenue</street>
            <city>Branston</city>
            <state>NSW</state>
            <postcode>2317</postcode>
            <email>gary.williams@email.com</email>
        </address>
    </person>

I have tried a few things, but I have no idea how I would get the data to display in a table. 我尝试了一些东西，但我不知道如何将数据显示在表格中。 The following is my XSL file which is how I assume they want the table to be shown, but with the results of the search. 以下是我的XSL文件，我假设他们希望显示表格，但是搜索结果。

<?xml version="1.0" encoding="ISO-8859-1"?><!-- DWXMLSource="Contact.xml" -->
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/">
<html>
<head>
<style>
body {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;
}
div {
    margin-left: 150px;
    margin-right: 20px;
    margin-top: 50px;
    width: 80%;
}
h1 {
    font-size: 24px;
    color: #F00;
}
.headings {
    background-color: #06F;
}
.data {
    background-color: #6F9;
}
.table {
    border: 2px solid #F00;
    width: 100%;
}
</style>
</head>
<body>
<div>
<h1>CONTACTS</h1>
    <table class="table">
        <tr class="headings">
            <th>First Name</th>
            <th>Last Name</th>
            <th>Street</th>
            <th>City</th>
            <th>State</th>
            <th>Postcode</th>
            <th>Email</th>
        </tr>
        <xsl:for-each select="contact/person">
        <tr class="data">
            <td><xsl:value-of select="name/firstname"/></td>
            <td><xsl:value-of select="name/lastname"/></td>
            <td><xsl:value-of select="address/street"/></td>
            <td><xsl:value-of select="address/city"/></td>
            <td><xsl:value-of select="address/state"/></td>
            <td><xsl:value-of select="address/postcode"/></td>
            <td><xsl:value-of select="address/email"/></td>
        </tr>
    </xsl:for-each>
</table>
</div>
</body>
</html>
</xsl:template>
</xsl:stylesheet>

I have to use JavaScript to search the XML file and create a table displaying the results from the search. 我必须使用JavaScript来搜索XML文件并创建一个显示搜索结果的表。

The HTML I have is as follows: 我的HTML如下：

<!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">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Task 2</title>
<script language="JavaScript" type="text/javascript">
window.onload = loadIndex;
function loadIndex()
{
    if (document.implementation && document.implementation.createDocument)
    {
        xmlDoc = document.implementation.createDocument("", "", null);
        xmlDoc.load("Contact.xml");
    }
    else if (window.ActiveXObject)
    {
        xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
        xmlDoc.async = "false";
        xmlDoc.load("Contact.xml");
    }
}
function searchIndex()
{
    if (!xmlDoc)
    {
        loadIndex();
    }
    var searchterm = document.getElementById("searchme").value;
    var allitems = xmlDoc.getElementsByTagName("firstname");
    results = new Array;
    for (var i=0;i<allitems.length;i++)
    {
        var name = allitems[i].lastChild.nodeValue;
        var exp = new RegExp(searchterm,"i");
        if ( name.match(exp) != null)
        {
            results.push(allitems[i]);
        }
    }
    showResults(results, searchterm);
}
function showResults(results, searchterm)
{
    //insert table data here to be displayed
}
</script>
</head>
<body>
First Name: <input type="text" name="firstname" id="searchme">
<br />
<input type="submit" value="Search" onClick="searchIndex(); return false;">
</body>
</html>

As you can see, I have no idea where to start. 如你所见，我不知道从哪里开始。 I know I would load the XML file, then gather the first name tag, then somehow compare the two then display the results. 我知道我会加载XML文件，然后收集第一个名称标签，然后以某种方式比较两个然后显示结果。

I have seen the following, and this is similar to what I am after, but I cant get the results to display in a table. 我已经看到了以下内容，这与我之后的情况类似，但我无法将结果显示在表格中。 http://www.dzone.com/snippets/simple-javascriptxml-based http://www.dzone.com/snippets/simple-javascriptxml-based

Thanks for the help. 谢谢您的帮助。

Answer 1

The following is what I used to fix the issues I was having. 以下是我用来解决我遇到的问题的方法。 One problem I was having is testing this locally. 我遇到的一个问题是在本地进行测试。 It will not work. 不起作用。 This also is pending a message if no contact is found. 如果未找到联系人，也会等待消息。 I will update when I find the solution. 当我找到解决方案时，我会更新。

UPDATE: Solution found. 更新：找到解决方案。 See updated code below: 请参阅以下更新代码：

<script language="JavaScript" type="text/javascript">
function loadXMLDoc(dname)
{
    if (window.XMLHttpRequest)
    {
        xhttp=new XMLHttpRequest();
    }
    else
    {
        xhttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
    xhttp.open("GET",dname,false);
    xhttp.send();
    return xhttp.responseXML;
} 
function searchXML()
{
    xmlDoc=loadXMLDoc("Contact.xml");
    x=xmlDoc.getElementsByTagName("firstname");
    input = document.getElementById("input").value;
    size = input.length;
    if (input == null || input == "")
    {
        document.getElementById("results").innerHTML= "Please enter a character or name!";
        return false;
    }
    for (i=0;i<x.length;i++)
    {
        startString = firstname.substring(0,size);
        if (startString.toLowerCase() == input.toLowerCase())
        {
            firstname=xmlDoc.getElementsByTagName("firstname")[i].childNodes[0].nodeValue;
            lastname=xmlDoc.getElementsByTagName("lastname")[i].childNodes[0].nodeValue;
            phone=xmlDoc.getElementsByTagName("phone")[i].childNodes[0].nodeValue;
            street=xmlDoc.getElementsByTagName("street")[i].childNodes[0].nodeValue;
            city=xmlDoc.getElementsByTagName("city")[i].childNodes[0].nodeValue;
            state=xmlDoc.getElementsByTagName("state")[i].childNodes[0].nodeValue;
            postcode=xmlDoc.getElementsByTagName("postcode")[i].childNodes[0].nodeValue;
            divText = "<h1>The contact details are:</h1><br /><table border=1><tr><th>First Name</th><th>Last Name</th><th>Phone</th><th>Street</th><th>City</th><th>State</th><th>Postcode</th></tr>" + "<tr><td>" + firstname + "</td><td>" + lastname + "</td><td>" + phone + "</td><td>" + street + "</td><td>" + city + "</td><td>" + state + "</td><td>" + postcode + "</td></tr>" + "</table>";
            break;
        }
        else
        {
            divText = "<h2>The contact does not exist.</h2>";
        }
    }
    document.getElementById("results").innerHTML= divText;
}
</script>

My html body: 我的HTML身体：

<body>
First Name: <input type="text" name="firstname" id="input">
<br />
<input type="submit" value="Submit" onClick="searchXML()">
<br />
<br />
<div id="results">
</div>
</body>

I hope this can help someone else out. 我希望这可以帮助其他人。

Answer 2

 startString = firstname.substring(0,size);

Here, firstname is no where define before for loop, that's why giving below error. 这里， firstname是for循环之前定义的地方，这就是为什么给出以下错误。

Uncaught TypeError: Cannot read property 'substring' of undefined. 未捕获的TypeError：无法读取未定义的属性“substring”。

Answer 3

I referenced first name as a variable like this before the startString. 我在startString之前将名字引用为这样的变量。

firstname = xmlDoc.getElementsByTagName("firstname")[i].childNodes[0].nodeValue;
startString = firstname.substring(0,size);

It worked great after that. 之后它运作得很好。 Hope that helps! 希望有所帮助！

使用JavaScript搜索XML并在表中显示结果

问题描述

3 个解决方案

解决方案1
1 已采纳 2013-06-11 09:55:19

解决方案2
0 2016-01-04 05:41:35

解决方案3
0 2017-01-04 21:29:05

使用JavaScript搜索XML并在表中显示结果

问题描述

3 个解决方案

解决方案1 1 已采纳 2013-06-11 09:55:19

解决方案2 0 2016-01-04 05:41:35

解决方案3 0 2017-01-04 21:29:05

解决方案1
1 已采纳 2013-06-11 09:55:19

解决方案2
0 2016-01-04 05:41:35

解决方案3
0 2017-01-04 21:29:05