


Detailed introduction to CMarkup class operation Xml summary
一、下载Markup.cpp 和 Markup.h
二、将此两个文件放置于工程目录下
三、在需要用到CMarkup的地方 #<a href="http://www.php.cn/wiki/137.html" target="_blank">include</a> "Markup.h"
当然VC中还需要配置一下环境
在VC6.0下:
a.在Markup.cpp的顶端加上 #include"stdafx.h" 或者
b.关闭Markup.cpp的预编译头设置,具体方法如下:
Project->Setting 弹出ProjectSetting对话框,在左边的文件树下选择Markup.cpp,然后在 "Settings for" 下拉框下选择 "All Configurations",选择 C/C++标签页,
接着在Category下拉框下选中 "Precompiled Headers"选项,选中下面的"Not Using Precompiled Headers." 单选按钮即可
CMarkup的基本使用:
例如要读取如下UserInfos.xml的内容
<?xml version="1.0" encoding="UTF-8" ?> <UserInfos> <UserInfo> <name>WangYao</name> <age>25</age> </UserInfo> <UserInfo> <name>Hisin</name> <age>27</age> </UserInfo> </UserInfos>
源代码如下:
CMarkup xml; bool flag; //加载Xml文件 flag = xml.Load("d:\\UserInfos.xml"); if (!flag) { AfxMessageBox(TEXT("加载d:\\UserInfos.xml失败,请检查")); return; } //定位到Root Elem xml.ResetPos(); flag = xml.FindElem("UserInfos"); //Root Elem为<UserInfos></UserInfos> if (!flag) { return; } xml.IntoElem(); //进入根节点 while(xml.FindElem(TEXT("UserInfo"))) { xml.IntoElem(); //进入<UserInfo></UserInfo> //获取name节点数据 flag = xml.FindElem(TEXT("name")); if (flag) { CString cstrName; cstrName = xml.GetData(); AfxMessageBox(cstrName); } //获取age节点数据 xml.ResetMainPos(); //保证不管name节点和age节点的顺序如何,都能找到age节点 flag = xml.FindElem(TEXT("age")); if (flag) { CString cstrAge; cstrAge = xml.GetData(); AfxMessageBox(cstrAge); } xml.OutOfElem(); //跳出<UserInfo></UserInfo> } xml.OutOfElem(); //跳出根节点
当然实现同样的功能也可以不进入UserInfo节点,源码如下,请仔细对比
xml.IntoElem(); //进入根节点 while(xml.FindElem(TEXT("UserInfo"))) { //获取name子节点数据 flag = xml.FindChildElem(TEXT("name")); if (flag) { CString cstrName; cstrName = xml.GetChildData(); AfxMessageBox(cstrName); } //获取age子节点数据 xml.ResetChildPos(); //保证不管name子节点和age子节点的顺序如何,都能找到age子节点 flag = xml.FindChildElem(TEXT("age")); if (flag) { CString cstrAge; cstrAge = xml.GetChildData(); AfxMessageBox(cstrAge); } } xml.OutOfElem(); //跳出根节点
Tips:<br/>
1.IntoElem与OutOfElem方法应成对使用
2.关于重置xml的Pos的函数
ResetPos | Resets the current position to the start of the document |
ResetMainPos | Resets the current main position to before the first sibling |
ResetChildPos | Resets the current child position to before the first child |
3.SavePos 与 RestorePos 复原xml Pos
SavePos | Saves the current position with an optional string name using a hash map |
RestorePos | Goes to the position saved with SavePos<br/> |
比如:
... xml.SavePos(Text("abc")); OpXml(xml); //该函数可能会改变xml的Pos,则可以利用SavePos与RestorePos复原该函数执行前xml的Pos xml.RestorePos(Text("abc")); ...
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