My test.xml like this:
<?xml version="1.0"?>
<!DOCTYPE PLAY SYSTEM "play.dtd">
<data>
<CurrentLevel>5</CurrentLevel>
<BestScoreLV1>1</BestScoreLV1>
<BestScoreLV2>2</BestScoreLV2>
</data>
<dict/>
My Code here:
std::string fullPath = CCFileUtils::sharedFileUtils()->fullPathFromRelativePath("text.xml");
tinyxml2::XMLDocument doc;
doc.LoadFile(fullPath.c_str());
tinyxml2::XMLElement* ele = doc.FirstChildElement("data")->FirstChildElement("BestScoreLV2")->ToElement();
ele->SetAttribute("value", 10);
doc.SaveFile(fullPath.c_str());
const char* title1 = doc.FirstChildElement("data")->FirstChildElement("BestScoreLV2")->GetText();
int level1 = atoi(title1);
CCLOG("result is: %d",level1);
But value of BestScoreLV2 when output is also 2. How can I change and write data to XML?
In TinyXML2 text is represented by XMLText class which is child of XMLNode class.
XMLNode have methods Value() and SetValue() which have different meanings for different XML nodes.
For text nodes Value() read node's text and SetValue() write it.
So you need code like this:
tinyxml2::XMLNode* value = doc.FirstChildElement("data")->
FirstChildElement("BestScoreLV2")->FirstChild();
value->SetValue("10");
The first child of BestScoreLV2 element is XMLText with value 2. You change this value to 10 by calling SetValue(10).
Related
I'm using RapidXML to parse XML files and read nodes content but I don't want to read values inside a node, I need to read the content of specific XML nodes "as XML" not as parsed values.
Example :
<node1>
<a_lot_of_xml>
< .... >
</a_lot_of_xml>
</node1>
I need to get the content of node1 as :
<a_lot_of_xml>
< .... >
</a_lot_of_xml>
What I tired :
I tried something but its not really good in my opinion, its about to put in node1, the path of an other xml file to read, I did like this :
<file1ToRead>MyFile.xml</file1ToRead>
And then my c++ code is the following :
ifstream file(FileToRead);
stringstream buffer; buffer << file.rdbuf();
But the problem is users will have a lot of XML files to maintain and I just want to use one xml file.
I think "a lot of XML files" is a better way, so you have a directory of all xml files, you can read the xml file when you need it, good for performance.
Back to the problem, can use the rapidxml::print function to get the xml format.
bool test_analyze_xml(const std::string& xml_path)
{
try
{
rapidxml::file<> f_doc(xml_path.c_str());
rapidxml::xml_document<> xml_doc;
xml_doc.parse<0>(const_cast<char*>(f_doc.data()));
rapidxml::xml_node<>* node_1 = xml_doc.first_node("node1");
if(node_1 == NULL)
{
return false;
}
rapidxml::xml_node<>* plain_txt = node_1->first_node("a_lot_of_xml");
if (plain_txt == NULL)
{
return false;
}
std::string xml_data;
rapidxml::print(std::back_inserter(xml_data), *plain_txt, rapidxml::print_no_indenting); //the xml_data is XML format.
}
catch (...)
{
return false;
}
return true;
}
I'm unfamiliar with rapidxml, but I have done this with tinyxml2. The trick is to read out node1 and then create a new XMLDoc (using tinyxml2 terms here) that contains everything inside of node1. From there, you can use their XMLPrinter class to convert your new XMLDoc (containing everything in node1) to a string.
tinyxml2 is a free download.
I had some problem with parsing xml document with french words.
For example pêche
After parsing i have this: "p\xc3\xaache" instead of "pêche"
Here is my code:
for(pugi::xml_node child = parent.first_child(); child; child = child.next_sibling()){
std::string desc = child.child_value("word");
}
Any suggestions?
Tnx.
I am trying to figure out a way to load the text from an XML document I have created using TinyXML2. Here is the entire document.
<?xml version="1.0" encoding="UTF-8"?>
<map version="1.0" orientation="orthogonal" width="15" height="13" tilewidth="32" tileheight="32">
<tileset firstgid="1" name="Background" tilewidth="32" tileheight="32">
<image source="background.png" width="64" height="32"/>
</tileset>
<tileset firstgid="3" name="Block" tilewidth="32" tileheight="32">
<image source="block.png" width="32" height="32"/>
</tileset>
<layer name="Background" width="15" height="13">
<data encoding="base64">
AgAAAAIAAAACAAAA...
</data>
</layer>
<layer name="Block" width="15" height="13">
<data encoding="base64">
AwAAAAMAAAADAAAAAwAAAAM...
</data>
</layer>
</map>
Basically, I want to copy the text from <data> into a string called background only if the layer name is "Background".
I have gotten the other variables like so:
// Get the basic information about the level
version = doc.FirstChildElement("map")->FloatAttribute("version");
orientation = doc.FirstChildElement("map")->Attribute("orientation");
mapWidth = doc.FirstChildElement("map")->IntAttribute("width");
mapHeight = doc.FirstChildElement("map")->IntAttribute("height");
That works great because I know the element name and the attribute name. Is there a way to say get the doc.FirstChildElement("map")->FirstChildElement("layer") and if it == "Background", get the text.
How would I accomplish this?
I know this thread is quite old, but just in case someone perusing the internet might stumble upon this question as I have, I wish to point out that Xanx's answer can be simplified slightly.
In tinyxml2.h it says that for the function const char* Attribute( const char* name, const char* value=0 ) const, if the value parameter is not null, then the function only returns if value and name match. According to the comments in the file this:
if ( ele->Attribute( "foo", "bar" ) ) callFooIsBar();
can be written like this:
if ( ele->Attribute( "foo" ) ) {
if ( strcmp( ele->Attribute( "foo" ), "bar" ) == 0 ) callFooIsBar();
}
So the code Xanx provided can be rewritten like this:
XMLElement * node = doc.FirstChildElement("map")->FirstChildElement("layer");
std::string value;
if (node->Attribute("name", "Background")) // no need for strcmp()
{
value = node->FirtChildElement("data")->GetText();
}
A minor change, yes, but something I wanted to add.
I advice you to do something like this:
XMLElement * node = doc.FirstChildElement("map")->FirstChildElement("layer");
std::string value;
// Get the Data element's text, if its a background:
if (strcmp(node->Attribute("name"), "Background") == 0)
{
value = node->FirtChildElement("data")->GetText();
}
auto bgData = text (find_element (doc, "map/layer[#name='Background']/data"));
Using tinyxml2 extension (#include <tixml2ex.h>).
N.B. should really be wrapped in a try/catch block.
Work in progress and documentation is incomplete (can deduce from the test example until it's ready).
I'll mention in passing that the other two answers only work properly when the desired <layer> element appears first.
I am working in C++. I would like to ask how to obtain the value text from:
<message> text </message>
I have
TiXmlHandle handle(&doc);
TiXmlElement* section;
section=doc.FirstChildElement("message");
How to do it from now on? I know I have to work with .Element() but I don't know how.
You can use the function GetText() to obtain the contents of <message>. I put your XML-contents in a file called dummy.xml and used the following code to print the contents:
TiXmlDocument doc("dummy.xml");
if(doc.LoadFile())
{
TiXmlHandle hDoc(&doc);
TiXmlElement *pRoot;
pRoot = doc.FirstChildElement("message");
printf("pRoot text: %s", pRoot->GetText());
}
Hi
I want to use XML file as a config file, from which I will read parameters for my application. I came across on PugiXML library, however I have problem with getting values of attributes.
My XML file looks like that
<?xml version="1.0"?>
<settings>
<deltaDistance> </deltaDistance>
<deltaConvergence>0.25 </deltaConvergence>
<deltaMerging>1.0 </deltaMerging>
<m> 2</m>
<multiplicativeFactor>0.7 </multiplicativeFactor>
<rhoGood> 0.7 </rhoGood>
<rhoMin>0.3 </rhoMin>
<rhoSelect>0.6 </rhoSelect>
<stuckProbability>0.2 </stuckProbability>
<zoneOfInfluenceMin>2.25 </zoneOfInfluenceMin>
</settings>
To pare XML file I use this code
void ReadConfig(char* file)
{
pugi::xml_document doc;
if (!doc.load_file(file)) return false;
pugi::xml_node tools = doc.child("settings");
//[code_traverse_iter
for (pugi::xml_node_iterator it = tools.begin(); it != tools.end(); ++it)
{
cout<<it->name() << " " << it->attribute(it->name()).as_double();
}
}
and I also was trying to use this
void ReadConfig(char* file)
{
pugi::xml_document doc;
if (!doc.load_file(file)) return false;
pugi::xml_node tools = doc.child("settings");
//[code_traverse_iter
for (pugi::xml_node_iterator it = tools.begin(); it != tools.end(); ++it)
{
cout<<it->name() << " " << it->value();
}
}
Attributes are loaded corectly , however all values are equals 0. Could somebody tell me what I do wrong ?
I think your problem is that you're expecting the value to be stored in the node itself, but it's really in a CHILD text node. A quick scan of the documentation showed that you might need
it->child_value()
instead of
it->value()
Are you trying to get all the attributes for a given node or do you want to get the attributes by name?
For the first case, you should be able to use this code:
unsigned int numAttributes = node.attributes();
for (unsigned int nAttribute = 0; nAttribute < numAtributes; ++nAttribute)
{
pug::xml_attribute attrib = node.attribute(nAttribute);
if (!attrib.empty())
{
// process here
}
}
For the second case:
LPCTSTR GetAttribute(pug::xml_node & node, LPCTSTR szAttribName)
{
if (szAttribName == NULL)
return NULL;
pug::xml_attribute attrib = node.attribute(szAttribName);
if (attrib.empty())
return NULL; // or empty string
return attrib.value();
}
If you want stock plain text data into the nodes like
<name> My Name</name>
You need to make it like
rootNode.append_child("name").append_child(node_pcdata).set_value("My name");
If you want to store datatypes, you need to set an attribute. I think what you want is to be able to read the value directly right?
When you are writing the node,
rootNode.append_child("version").append_attribute("value").set_value(0.11)
When you want to read it,
rootNode.child("version").attribute("version").as_double()
At least that's my way of doing it!