How to read XML element using tinyxml2 in C++?
I am trying to read config.xml
with following simple content:
<?xml version="1.0" encoding="utf-8"?> <config> <languages> <language>cs</language> <language>en</language> </languages> <databases> <database> <domain>localhost</domain> <server>localhost</server> <username>admin</username> <password>admin</password> <name>annmproject</name> <prefix>site_</prefix> </database> </databases> </config>
I wrote some very simple code for reading first language:
config->LoadFile("config.xml"); if(config->ErrorID() != 0) return 1; tinyxml2::XMLElement* root = config->FirstChildElement("config"); tinyxml2::XMLElement* element = root->FirstChildElement("languages"); std::cout << element->FirstChildElement("language")->GetText() << "<br>" << endl;
It should work fine. The file is successfuly opened. And when I am testing null pointers, everything is alright. But when I try to print the value, it stops to work.
Did you make tinyxml2::XMLDocument* config;
a pointer? Because you write config->LoadFile("config.xml");
.
Try with an easier definition of config like so:
tinyxml2::XMLDocument config; config.LoadFile("config.xml");
Can’t say for sure what is wrong if no error message is present, but you’re missing the std::
before endl
. Code update for config as a value instead of a pointer:
tinyxml2::XMLElement* root = config.FirstChildElement("config"); tinyxml2::XMLElement* element = root->FirstChildElement("languages"); std::cout << element->FirstChildElement("language")->GetText() << std::endl;
Option 2 with iterating (config as a value):
tinyxml2::XMLElement* root = config.FirstChildElement("config"); tinyxml2::XMLElement* element = root->FirstChildElement("languages"); for (tinyxml2::XMLElement* language = element->FirstChildElement(); language != NULL; language = language->NextSiblingElement()) { std::cout << language->GetText() << std::endl; }
EDIT: Note where I use the dots "." and where the arrows "->"!