C++ 使用 TinyXML 解析 XML 元素
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Parsing XML Elements using TinyXML
提问by Jon
UPDATE: Still not working :( I have updated the code portion to reflect what I currently have.
更新：仍然无法正常工作:(我已经更新了代码部分以反映我目前拥有的内容。
This should be a pretty easy question for people who have used TinyXML. I'm attempting to use TinyXML to parse through an XML document and pull out some values. I figured out how to add in the library yesterday, and I have successfully loaded the document (hey, it's a start).
对于使用过 TinyXML 的人来说，这应该是一个非常简单的问题。我正在尝试使用 TinyXML 解析 XML 文档并提取一些值。我昨天想出了如何在库中添加，并且我已经成功加载了文档（嘿，这是一个开始）。
I've been reading through the manual and I can't quite figure out how to pull out individual attributes. After Googling around, I haven't found an example of my specific example, so perhaps someone here who has used TinyXML can help out. Below is a slice of the XML, and where I have started to parse it.
我一直在阅读手册，但我不太清楚如何提取单个属性。在谷歌搜索之后，我还没有找到我的具体示例的示例，所以也许这里使用过 TinyXML 的人可以提供帮助。下面是 XML 的一部分，我开始解析它。
XML:
XML：
<EGCs xmlns="http://tempuri.org/XMLSchema.xsd">
<card type="EGC1">
<offsets>
[ ... ]
</offsets>
</card>
<card type="EGC2">
<offsets>
[ ... ]
</offsets>
</card>
</EGCs>
Loading/parsing code:
加载/解析代码：
TiXmlDocument doc("EGC_Cards.xml");
if(doc.LoadFile())
{
TiXmlHandle hDoc(&doc);
TiXmlElement* pElem;
TiXmlHandle hRoot(0);
pElem = hDoc.FirstChildElement().Element();
if (!pElem) return false;
hRoot = TiXmlHandle(pElem);
//const char *attribval = hRoot.FirstChild("card").ToElement()->Attribute("card");
pElem = hDoc.FirstChild("EGCs").Child("card", 1).ToElement();
if(pElem)
{
const char* tmp = pElem->GetText();
CComboBox *combo = (CComboBox*)GetDlgItem(IDC_EGC_CARD_TYPE);
combo->AddString(tmp);
}
}
I want to pull out each card "type" and save it to a string to put into a combobox. How do I access this attribute member?
我想拉出每张卡片“类型”并将其保存到一个字符串中以放入组合框。我如何访问这个属性成员？
回答by Jon
After a lot of playing around with the code, here is the solution! (With help from HERE)
在对代码进行了大量尝试之后，这里是解决方案！（在此处的帮助下）
TiXmlDocument doc("EGC_Cards.xml");
combo = (CComboBox*)GetDlgItem(IDC_EGC_CARD_TYPE);
if(doc.LoadFile())
{
TiXmlHandle hDoc(&doc);
TiXmlElement *pRoot, *pParm;
pRoot = doc.FirstChildElement("EGCs");
if(pRoot)
{
pParm = pRoot->FirstChildElement("card");
int i = 0; // for sorting the entries
while(pParm)
{
combo->InsertString(i, pParm->Attribute("type"));
pParm = pParm->NextSiblingElement("card");
i++;
}
}
}
else
{
AfxMessageBox("Could not load XML File.");
return false;
}
回答by Rob
there should be a Attribute method that takes and attribut name as parameter see: http://www.grinninglizard.com/tinyxmldocs/classTiXmlElement.html
应该有一个将属性名称作为参数的属性方法，请参见：http: //www.grinninglizard.com/tinyxmldocs/classTiXmlElement.html
from the documentation I see the code would look like:
从文档中我看到代码看起来像：
hRoot.FirstChildElement("card").ToElement()->Attibute("type");
However for the type of thing you are doing I would use XPATH if at all possible. I have never used it but the TinyXPath project may be helpful if you choose to go that route the link is: http://tinyxpath.sourceforge.net/
但是，对于您正在做的事情类型，如果可能的话，我会使用 XPATH。我从未使用过它，但如果您选择走这条路线，TinyXPath 项目可能会有所帮助，链接是：http: //tinyxpath.sourceforge.net/
Hope this helps.
希望这可以帮助。
The documentation I am using to help you from is found at: http://www.grinninglizard.com/tinyxmldocs/hierarchy.html
我用来帮助您的文档位于：http: //www.grinninglizard.com/tinyxmldocs/hierarchy.html
回答by iceaway
What you need is to get the attribute typefrom the element card. So in your code it should be something like:
您需要的是type从 element获取属性card。所以在你的代码中它应该是这样的：
const char * attribval = hRoot.FirstChild("card").ToElement()->Attribute("card");
