TinyXml、TinyXPath 基本讀取

需求：欲讀取下列XML檔案中的TEXT資料：

 

 127.0.0.1
 800

 
string readXmlSingleText(string file,string xpath){

 char errStr[MSG_MIN_LEN] = {'\0'};

 TiXmlDocument xmlDoc(file.c_str());
 xmlDoc.LoadFile();

 if(xmlDoc.ErrorId() > 0){
              //error do something..
 }

 TiXmlElement* pRootElement = xmlDoc.RootElement();

 if(!pRootElement){
             //error do something..
 }


 TinyXPath::xpath_processor xproc(pRootElement,xpath.c_str()); 
 unsigned  nodeCount =xproc.u_compute_xpath_node_set();          
 if(nodeCount==0) {
            //error do something..
 } 

 TiXmlNode *xnode = xproc.XNp_get_xpath_node(0);
 return string(xnode->ToElement()->GetText());
}

使用方式如下：

    string ip = readXmlSingleText("setting.xml","//ROOT/SEND-IP");