Rapidxml-覆盖以前的xml_nodes

问题描述

我刚刚开始使用Rapidxml.我1创建一个要读取的xml文件.如此快速轻松地工作.

I just started using rapidxml. I 1st create an xml file to read from. Worked so fast an easy.

这是我手动创建的内容.

This is what I manual crated.

<?xml version="1.0" encoding="utf-8"?>
<GPS>
    <Path>
        <Point X="-3684.136" Y="3566.282" Z="285.2893" />
        <Point X="-3681.816" Y="3540.431" Z="283.3658" />
        <Point X="-3687.079" Y="3515.315" Z="282.6284" />
    </Path>
</GPS>

我可以很容易地读到它，没有问题.然后，我想将其写入新文件.但是问题在于它一直在覆盖以前的xml_nodes.

I could easy read that with no problems. I then wanted to write it to a new file.But the problem is that it keeps overwriting previous xml_nodes.

例如，

<?xml version="1.0" encoding="UTF-8"?>
<GPS>
    <Path>
        <Point X="-3687.08" Y="3515.31" Z="282.628"/>
        <Point X="-3687.08" Y="3515.31" Z="282.628"/>
        <Point X="-3687.08" Y="3515.31" Z="282.628"/>
    </Path>
</GPS>

这是创建该xml文件的代码，

This is the code that creates that xml file,

int Write(pathStruct *toStore)
{
    xml_document<> doc;

    xml_node<>* decl = doc.allocate_node(node_declaration);
    decl->append_attribute(doc.allocate_attribute("version", "1.0"));
    decl->append_attribute(doc.allocate_attribute("encoding", "UTF-8"));
    doc.append_node(decl);

    xml_node<> *GPS = doc.allocate_node(node_element, "GPS");
    doc.append_node(GPS);

    cout << "Saving GrindPath " << endl;
    xml_node<> *Path = doc.allocate_node(node_element, "Path");
    GPS->append_node(Path);

    for(int i = 0;i<3;i++) //Temp Static
    {
        xml_node<> *Point = doc.allocate_node(node_element, "Point");
        Path->append_node(Point);

        char x[10];
        FloatToCharA(toStore->X[i], x);
        Point->append_attribute(doc.allocate_attribute("X", x));

        char y[10];
        FloatToCharA(toStore->Y[i], y);
        Point->append_attribute(doc.allocate_attribute("Y", y));

        char z[10];
        FloatToCharA(toStore->Z[i], z);
        Point->append_attribute(doc.allocate_attribute("Z", z));

        //GrindPath->append_node(Point);
        //doc.first_node()->append_node(GrindPath);
        //Point = GrindPath->next_sibling();

        cout << "x:" << toStore->X[i] << "    y:" << toStore->Y[i] << "   z:" << toStore->Z[i] << endl;
    }

    cout << "Done! " << endl;
    std::ofstream myfile;
    myfile.open ("./toStore.xml");
    myfile << doc;
    return 0;

};

我的问题是他如何停止覆盖以前的xml_nodes?我尝试了很多事情，但是每次它仍然覆盖以前的xml_nodes时.我知道这一定很简单，否则我就错过了全局.

My question his how to I stop it from overwriting previous xml_nodes?I have attempted many thing but every time its still overwrites previous xml_nodes.I know it must be simple or I am missing the big picture.

感谢您的帮助和时间！

推荐答案

我不确定这是否有帮助，但这存在于文档:

I am not sure if this will help but this exists in the documentation:

我可以在您的代码中看到，看来您的char数组x，y，z是在循环范围内创建的，因此不满足上述要求.

I can see in your code that it appears that your char arrays x, y, z are created in scope of your loop and as such do not satisfy the requirements above.

这篇关于Rapidxml-覆盖以前的xml_nodes的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！