c++ - 插入元素 (TinyXml)

Question

我想在 xml 文件中添加元素。谁能帮我做到这一点？

以下是我的代码试用。

 <?xml version="1.0" encoding="UTF-8" ?>
    <category1>
        <category2 name="1">1.79639 0.430521</category2 >
        <category2 name="2">2.06832 0.652695</category2 >
        <category2 name="3">1.23123 0.111212</category2 >    <-- new
    </category1>

代码:

 if (doc.LoadFile()) {
                TiXmlHandle docHandle(&doc);
                TiXmlElement* fileLog = docHandle.FirstChild("category1").ToElement();
                if (fileLog) {
                    TiXmlElement newCategory2("category2");
                    newCategory2.SetAttribute("name", "5");
                    fileLog->InsertEndChild(newCategory2);
                }
            }

希望得到大家的帮助。

Answer 1

TiXML 不接受 XML 标签之间的空格作为 </category2 > , 它必须是 </category2> .您的 LoadFile 将返回 false，并且不会插入该节点。

以下代码按预期工作:

    const char * szTiXML = "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>"
        "<category1>"
        "<category2 name=\"1\">1.79639 0.430521</category2>"
        "<category2 name=\"2\">2.06832 0.652695</category2>"
        "<category2 name=\"3\">1.23123 0.111212</category2>"
        "</category1>";

    TiXmlDocument doc;
    doc.Parse( szTiXML );
    //if (doc.LoadFile()) 
    {
        TiXmlHandle docHandle(&doc);
        TiXmlElement* fileLog = docHandle.FirstChild("category1").ToElement();
        if (fileLog) {
            TiXmlElement newCategory2("category2");
            TiXmlText myText("Hello From SO");

            newCategory2.SetAttribute("name", "5");
            newCategory2.InsertEndChild(myText);

            fileLog->InsertEndChild(newCategory2);
        }

        doc.Print(stdout);
    }

输出:

<?xml version="1.0" encoding="UTF-8" ?>
<category1>
    <category2 name="1">1.79639 0.430521</category2>
    <category2 name="2">2.06832 0.652695</category2>
    <category2 name="3">1.23123 0.111212</category2>
    <category2 name="5">Hello From SO</category2>
</category1>