使用TinyXml2提取子树XML字符串 [英] Extracting sub-tree XML string with TinyXml2

问题描述

我想做与这个问题.

我想将XML子元素(及其所有子元素)转换为XML字符串，所以如果XML结构是

I want to convert an XML child element (and all of its children) to an XML string, so if the XML structure were

<parent>
    <child>
        <value>abc</value>
    </child>
<parent>

我想要子元素的xml，例如

I want the xml for the child element, e.g.

<child>
    <value>abc</value>
</child>

我不在乎空格.问题在于另一个问题中的接受的答案似乎已过时，因为没有打印"方法用于XMLElement对象.我可以用TinyXml2做到这一点吗?

I don't care about whitespace. The problem is that the accepted answer from the other question appears to be out of date, because there is no "Print" method for XMLElement objects. Can I do this with TinyXml2?

推荐答案

我编写了以下对我有用的函数.请注意，它可能存在错误-我正在使用非常简单的XML文件，因此我不会假装已经测试了所有情况.

I coded up the following function that does the trick for me. Please note that it may have bugs- I am working with very simple XML files, so I won't pretend that I have tested all cases.

void GenXmlString(tinyxml2::XMLElement *element, std::string &str)
{
    if (element == NULL) {
        return;
    }

    str.append("<");
    str.append(element->Value());
    str.append(">");

    if (element->GetText() != NULL) {
        str.append(element->GetText());
    }

    tinyxml2::XMLElement *childElement = element->FirstChildElement();
    while (childElement != NULL) {
        GenXmlString(childElement, str);
        childElement = childElement->NextSiblingElement();
    }

    str.append("</");
    str.append(element->Value());
    str.append(">");
}

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