Node + xmldom:如何更改 javascript 中单个 XML 字段的值? [英] Node + xmldom: How do I change the value of a single XML field in javascript?

问题描述

使用 node v.0.10.29，Express v4.12.0 和 xmldom v0.1.19，我正在尝试执行以下操作:

Using node v.0.10.29, Express v4.12.0, and xmldom v0.1.19, I'm trying to do the following:

1. 将 XML 文件读入字符串
2. 使用将字符串转换为XML对象xmldom
3. 将 default 字段设置为 test
4. 将 XML 对象转换回字符串

1. Read an XML file into a string
2. Convert the string into an XML object using xmldom
3. Set the <name>default</name> field to <name>test</name>
4. Convert the XML object back into a string

问题

问题是，在我设置 字段后，它在对象中正确设置，但是当我将其转换为字符串时，; 字段恢复为旧值(错误).

Problem

The problem is that after I set the <name> field, it sets correctly in the object, but when I convert it to a string, the <name> field is back to being the old value (wrong).

代码如下:

var fs = require('fs');
var DOMParser = require('xmldom').DOMParser;
var XMLSerializer = require('xmldom').XMLSerializer;
var filename = "myFile.xml";

fs.readFile(filename, "utf-8", function (err,data) 
{
    //CREATE/PARSE XML OBJECT FROM STRING
    var customerConfig = new DOMParser().parseFromString(data);

    //SET VALUE TO "TEST" (<name>default</name> TO <name>test</name>)
    customerConfig.getElementsByTagName("name")[0].childNodes[0].nodeValue = "test";

    //THIS OUTPUTS "test" WHICH IS CORRECT - 
    console.log(customerConfig.getElementsByTagName("name")[0].childNodes[0].nodeValue);

    //SERIALIZE TO STRING
    var xmlString = new XMLSerializer().serializeToString(customerConfig);

    //THIS OUTPUTS THE FULL XML FILE, 
    //BUT STILL SHOWS <name>default</name> AND NOT <name>test</name>
    console.log(xmlString);
});

问题是 字段没有在字符串中设置为 test ......我在想序列化部分有问题?有人看到我做错了什么吗?

The problem is that the <name> field isn't setting to test in the string... I'm thinking there is a problem with the serialization part? Anyone see what I'm doing wrong?

谢谢！！

推荐答案

好吧，我找到了问题所在！

Well I figured out the problem!

我正在设置 nodeValue 但我确实需要设置 data.所以我改了

I was setting nodeValue but I really needed to set data. So I changed

customerConfig.getElementsByTagName("name")[0].childNodes[0].nodeValue = "test";

到

customerConfig.getElementsByTagName("name")[0].childNodes[0].data= "test";

然后就成功了！

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