CMarkup类解析xml文件

最新推荐文章于 2015-01-21 07:35:00 发布

DoWeixin6

最新推荐文章于 2015-01-21 07:35:00 发布

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文章标签： xml encoding user 文档 math null

本文链接：https://blog.youkuaiyun.com/evgd2288/article/details/5643432

本文介绍了使用CMarkup库创建、浏览、修改和删除XML文档的步骤，包括添加元素、属性，查找特定元素及属性，以及修改特定元素的属性。

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将CMarkup.cpp和CMarkup.h导入到我们的工程中就可以了。编译可能会出现问题，解决的方法是在CMarkup.cpp的开头加上#include <stdafx.h>，或者关闭预编译也可以。

1、创建一个XML文档

---tagName:Department,Data:Computer--

---tagName:Department,Data:Math--

---tagName:Department,Data:English--

3、修改元素
//把Department为”English“改为”Chinese“

1      CMarkup xml;
2      BOOL bLoadXml=FALSE;
3      bLoadXml=xml.Load("School.xml");
4
5     if(bLoadXml)
6      {
7          CString str=_T("");
8          xml.ResetMainPos();
9          xml.FindElem();
10          xml.IntoElem();
11         while(xml.FindElem("Department"))
12          {
13              str=xml.GetData();
14             if(str=="English")
15              {
16                  xml.SetData("Chinese");
17                  xml.Save("School.xml");
18                 break;
19              }
20          }
21      }

效果如下：

<?xml version="1.0" encoding="UTF-8"?>
2

<School>
3

<Department>Automation</Department>
4

<Department>Computer</Department>
5

<Department>Math</Department>
6

<Department>Chinese</Department>
7

</School>
8

对于创建一个XML文档，需要实例化一个CMarkup对象，并调用AddElem创建根元素。在这个位置，如果你调用 AddElem("School") ，文档会简单的装一个空元素<School/>. 然后调用AddChildElem 在根元素的下面创建元素。

1      CMarkup xml;
2      xml.SetDoc("<?xml version=/"1.0/" encoding=/"UTF-8/"?>/r/n");
3      xml.AddElem("School");
4      xml.IntoElem();
5      xml.AddElem("Department","Automation");
6      xml.AddElem("Department","Computer");
7      xml.AddElem("Department","Math");
8      xml.AddElem("Department","English");
9      xml.OutOfElem();
10      xml.Save("School.xml");

效果如下：

<?xml version="1.0" encoding="UTF-8"?>
2

<School>
3

<Department>Automation</Department>
4

<Department>Computer</Department>
5

<Department>Math</Department>
6

<Department>English</Department>
7

</School>
8

2、浏览特定元素

4、添加
4、1 添加在最后面（用AddElem）

1      CMarkup xml;
2      BOOL bLoadXml=FALSE;
3      bLoadXml=xml.Load("School.xml");
4     if(bLoadXml)
5      {
6          xml.ResetMainPos();
7          xml.FindElem();
8          xml.IntoElem();
9          xml.AddElem("Department","SiQinghua");
10          xml.OutOfElem();
11          xml.Save("School.xml");
12      }

效果如下：

<?xml version="1.0" encoding="UTF-8"?>
2

<School>
3

<Department>Automation</Department>
4

<Department>Computer</Department>
5

<Department>Math</Department>
6

<Department>Chinese</Department>
7

<Department>SiQinghua</Department>
8

</School>

4、2 添加在最前面（用InsertElem）

效果如下：

<?xml version="1.0" encoding="UTF-8"?>
2

<School>
3

<Department>NARI</Department>
4

<Department>Automation</Department>
5

<Department>Computer</Department>
6

<Department>Math</Department>
7

<Department>Chinese</Department>
8

<Department>SiQinghua</Department>
9

</School>
10

5、删除

1      CMarkup xml;
2      BOOL bLoadXml=FALSE;
3      bLoadXml=xml.Load("School.xml");
4     if(bLoadXml)
5      {
6          BOOL bFind=TRUE;
7          xml.ResetMainPos();
8         while(bFind)
9          {
10              bFind=xml.FindChildElem("Department");
11             if(bFind)
12              {
13                  CString strData=_T("");
14                  strData=xml.GetChildData();    //此时节点还是父节点
15                 if("SiQinghua"==strData)
16                  {
17                      xml.RemoveChildElem();
18                      xml.Save("School.xml");
19                     break;
20                  }
21              }
22          }
23      }

效果如下：

1 <?xml version="1.0" encoding="UTF-8"?>
2 <School>
3     <Department>NARI</Department>
4     <Department>Automation</Department>
5     <Department>Computer</Department>
6     <Department>Math</Department>
7     <Department>Chinese</Department>
8 </School>
9

上面的例子都是不带属性的，下面举一个带有属性的例子。
1、生成XML文档

1      CMarkup xml;
2      xml.SetDoc("<?xml version=/"1.0/" encoding=/"UTF-8/"?>");
3      xml.AddElem("UserInfo");
4      xml.IntoElem();
5     for(int i=0;i<10;i++)
6      {
7          CString strID=_T("");
8          CString strPwd=_T("");
9
10          srand(UINT(time(NULL)+i)); //产生一个随机数
11         int nLevel=rand()%256;
12
13          strID.Format("UserID%02d",i);
14          strPwd.Format("UserPwd%02d",i);
15
16          xml.AddElem("User");
17          xml.AddAttrib("UserID",strID);
18          xml.AddAttrib("UserPwd",strPwd);
19          xml.AddAttrib("UserLevel",nLevel);
20      }
21      xml.OutOfElem();
22      xml.Save("UserInfo.xml");

效果如下：

<?xml version="1.0" encoding="UTF-8"?>
2

<UserInfo>
3

<User UserID="UserID00" UserPwd="UserPwd00" UserLevel="85"/>
4

<User UserID="UserID01" UserPwd="UserPwd01" UserLevel="88"/>
5

<User UserID="UserID02" UserPwd="UserPwd02" UserLevel="92"/>
6

<User UserID="UserID03" UserPwd="UserPwd03" UserLevel="95"/>
7

<User UserID="UserID04" UserPwd="UserPwd04" UserLevel="98"/>
8

<User UserID="UserID05" UserPwd="UserPwd05" UserLevel="101"/>
9

<User UserID="UserID06" UserPwd="UserPwd06" UserLevel="105"/>
10

<User UserID="UserID07" UserPwd="UserPwd07" UserLevel="108"/>
11

<User UserID="UserID08" UserPwd="UserPwd08" UserLevel="111"/>
12

<User UserID="UserID09" UserPwd="UserPwd09" UserLevel="115"/>
13

</UserInfo>
14

2、查找特定属性

1      CMarkup xml;
2      BOOL bLoadXml=FALSE;
3      BOOL bFind=FALSE;
4      bLoadXml=xml.Load("UserInfo.xml");
5     if(bLoadXml)
6      {
7          CString strID;
8          CString strPwd;
9          xml.ResetMainPos();
10          xml.FindElem();    //UserInfo
11         while(xml.FindChildElem("User"))
12          {
13              strID=xml.GetChildAttrib("UserID");
14              strPwd=xml.GetChildAttrib("UserPwd");
15              TRACE("/n---id:%s,pwd:%s---/n",strID,strPwd);
16             if(strID=="UserID02" && strPwd=="UserPwd02")
17              {
18                  bFind=TRUE;
19                 break;
20              }
21          }
22      }
23     if(bFind==TRUE)
24          TRACE("/n---find---/n");
25     else
26          TRACE("/n---not find---/n");

修改特定属性

1      CMarkup xml;
2      BOOL bFind=FALSE;
3      BOOL bLoadXml=FALSE;
4      bLoadXml=xml.Load("UserInfo.xml");
5     if(bLoadXml)
6      {
7          CString strID;
8          CString strPwd;
9          xml.ResetMainPos();
10          xml.FindElem();    //UserInfo
11         while(xml.FindChildElem("User"))
12          {
13              strID=xml.GetChildAttrib("UserID");
14              strPwd=xml.GetChildAttrib("UserPwd");
15              TRACE("/n--id:%s,pwd:%s--/n",strID,strPwd);
16             if(strID=="UserID02" && strPwd=="UserPwd02")
17              {
18                  bFind=TRUE;
19                  xml.SetChildAttrib("UserID",strID+CString("Modified"));
20                  xml.Save("UserInfo.xml");
21                 break;
22              }
23          }
24      }
25     if(bFind==TRUE)
26          TRACE("/n---find---/n");
27     else
28          TRACE("/n---not find---/n");

效果如下：

<?xml version="1.0" encoding="UTF-8"?>
2

<UserInfo>
3

<User UserID="UserID00" UserPwd="UserPwd00" UserLevel="85"/>
4

<User UserID="UserID01" UserPwd="UserPwd01" UserLevel="88"/>
5

<User UserID="UserID02Modified" UserPwd="UserPwd02" UserLevel="92"/>
6

<User UserID="UserID03" UserPwd="UserPwd03" UserLevel="95"/>
7

<User UserID="UserID04" UserPwd="UserPwd04" UserLevel="98"/>
8

<User UserID="UserID05" UserPwd="UserPwd05" UserLevel="101"/>
9

<User UserID="UserID06" UserPwd="UserPwd06" UserLevel="105"/>
10

<User UserID="UserID07" UserPwd="UserPwd07" UserLevel="108"/>
11

<User UserID="UserID08" UserPwd="UserPwd08" UserLevel="111"/>
12

<User UserID="UserID09" UserPwd="UserPwd09" UserLevel="115"/>
13

</UserInfo>

1      CMarkup xml;
2      xml.Load("School.xml");
3      BOOL bFind=TRUE;
4      xml.ResetMainPos();
5
6     while(xml.FindChildElem("Department"))
7      {
8          CString strTagName=_T("");
9          CString strData=_T("");
10          strTagName=xml.GetChildTagName();    //此时节点是父节点
11          strData=xml.GetChildData();
12          TRACE("/n---tagName:%s,Data:%s--/n",strTagName,strData);
13      }

//***********************这样也可以*****************************/

1      CMarkup xml;
2      xml.Load("School.xml");
3      BOOL bFind = TRUE;
4      xml.ResetMainPos();
5
6     while (xml.FindChildElem("Department"))
7      {
8          xml.IntoElem();
9          CString strTagName = _T("");
10          CString strData = _T("");
11          strTagName = xml.GetTagName();
12          strData = xml.GetData();
13          TRACE("/n---tagName:%s,Data:%s--/n",strTagName,strData);
14          xml.OutOfElem();
15      }

//***********************或者这样也可以***************************/

1      CMarkup xml;
2      xml.Load("School.xml");
3      BOOL bFind = TRUE;
4      xml.ResetMainPos();
5      xml.FindElem();  //School
6      xml.IntoElem();
7
8     while (xml.FindElem("Department"))
9      {
10          CString strTagName = _T("");
11          CString strData = _T("");
12          strTagName = xml.GetTagName();
13          strData = xml.GetData();
14          TRACE("/n---tagName:%s,Data:%s--/n",strTagName,strData);
15      }

//***********结果**************
---tagName:Department,Data:Automation--