在微小的Xml元素中更新数据 [英] Updating Data in tiny Xml element
问题描述
我的问题是:是否可以更改xml元素中的数据?
My question is: is it possible to change the data in an xml element?
我要做的是根据所按下的按钮更改元素中的数据.我目前可以读取和写入xml文件,但我想将其更改为,第一次写一个新元素,然后编辑该元素,因为它当前每次都在不断写入一个新元素.
What i want to do is change the data in the element depending on what button is pressed. I currently have it reading and writing to the xml file working but i want to change it to, write a new element first time round and then after that edit the element as it currently just keeps writing a new element each time.
这是我当前编写新元素的代码
This is my current code for writing the new element
if (doc.LoadFile(XMLDOC) == tinyxml2::XML_SUCCESS){
//Get Root Node
tinyxml2::XMLElement* rootNode = doc.FirstChildElement();//Assets
//Get Next Node
tinyxml2::XMLElement* childNode = rootNode->FirstChildElement();//imagePaths
//Temp Element
tinyxml2::XMLElement* temp = nullptr;
tinyxml2::XMLElement* temp2 = childNode->FirstChildElement();//path
while (temp2 != nullptr){
temp = temp2;
temp2 = temp2->NextSiblingElement("path");
}
if (temp != nullptr){
//write the text
tinyxml2::XMLComment* newComment = doc.NewComment("Selected Player");
tinyxml2::XMLElement* newElement = doc.NewElement("path");
//get text passed in
newElement->SetText(choice.c_str());
newElement->SetAttribute("name", "selected_player");
childNode->InsertAfterChild(temp, newComment);
childNode->InsertAfterChild(newComment, newElement);
}
//doc.Print();
doc.SaveFile(XMLDOC);
}
else{
std::cout << "Could Not Load XML Document : %s" << XMLDOC << std::endl;
}
}
感谢您提供高级帮助
推荐答案
我不是100%确定所需的行为.这是基于您的问题代码示例的代码示例:
I'm not 100% sure what the desired behavior you want. Here is a code sample based off of your question code sample:
#include "tinyxml2.h"
#include <iostream>
#include <string>
#define XMLDOC "test.xml"
std::string choice = "New Text";
int main()
{
tinyxml2::XMLDocument doc;
if (doc.LoadFile(XMLDOC) == tinyxml2::XML_SUCCESS){
//Get Root Node
tinyxml2::XMLElement* rootNode = doc.FirstChildElement();//Assets
//Get Next Node
tinyxml2::XMLElement* childNode = rootNode->FirstChildElement();//imagePaths
//Path Node
tinyxml2::XMLElement* pathNode = childNode->FirstChildElement();//path
if (pathNode == nullptr){
//write the text
tinyxml2::XMLComment* newComment = doc.NewComment("Selected Player");
tinyxml2::XMLElement* newElement = doc.NewElement("path");
newElement->SetAttribute("name", "selected_player");
newElement->SetText(choice.c_str());
childNode->InsertFirstChild(newComment);
childNode->InsertAfterChild(newComment, newElement);
}
else{
pathNode->SetText(choice.c_str());
}
doc.SaveFile(XMLDOC);
}
else{
std::cout << "Could Not Load XML Document : " << XMLDOC << std::endl;
}
}
给出一个看起来像这样的XML文件:
Given a XML file that looks like this:
<Assets>
<ImagePaths>
</ImagePaths>
</Assets>
运行后,它看起来像这样:
After running it would look like this:
<Assets>
<ImagePaths>
<!--Selected Player-->
<path name="selected_player">New Text</path>
</ImagePaths>
</Assets>
如果再次运行该程序,您将仅获得带有选择字符串包含的文本的单路径节点.
And if you run the program again you get just the single path node with the text that your choice string contains.
希望有帮助!
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