CMarkup类解析xml文件 例子

本文介绍使用CMarkup类进行XML文件的创建、查询、修改及增删操作。通过具体示例展示了如何实例化CMarkup对象、添加元素、查询特定元素、修改元素内容及属性等关键步骤。

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CMarkup类解析xml文件

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

 CMarkup xml;

 xml.Load("School.xml");

 BOOL bFind=TRUE;

 xml.ResetMainPos();



while(xml.FindChildElem("Department"))

 {
     CString strTagName=_T("");

     CString strData=_T("");

      strTagName=xml.GetChildTagName();    //此时节点是父节点

      strData=xml.GetChildData();

      TRACE("\n---tagName:%s,Data:%s--\n",strTagName,strData);

  }

//这样也可以******/

 CMarkup xml;

 xml.Load("School.xml");

 BOOL bFind = TRUE;

 xml.ResetMainPos();



while (xml.FindChildElem("Department"))        

 {
     xml.IntoElem();

     CString strTagName = _T("");

      CString strData = _T("");

      strTagName = xml.GetTagName();

      strData = xml.GetData();

      TRACE("\n---tagName:%s,Data:%s--\n",strTagName,strData);

      xml.OutOfElem();

  }

//或者这样也可以****/

 CMarkup xml;

 xml.Load("School.xml");

 BOOL bFind = TRUE;

 xml.ResetMainPos();

 xml.FindElem();  //School

 xml.IntoElem();



while (xml.FindElem("Department"))

 {
      CString strTagName = _T("");

      CString strData = _T("");

      strTagName = xml.GetTagName();

      strData = xml.GetData();

      TRACE("\n---tagName:%s,Data:%s--\n",strTagName,strData);

  }

//结果***

  ---tagName:Department,Data:Automation--

—tagName:Department,Data:Computer–

—tagName:Department,Data:Math–

—tagName:Department,Data:English–

3、修改元素

//把Department为”English“改为”Chinese“

 CMarkup xml;

 BOOL bLoadXml=FALSE;

 bLoadXml=xml.Load("School.xml");



if(bLoadXml)

 {
     CString str=_T("");

     xml.ResetMainPos();

     xml.FindElem();

      xml.IntoElem();

     while(xml.FindElem("Department"))

      {
          str=xml.GetData();

         if(str=="English")

          {
              xml.SetData("Chinese");

              xml.Save("School.xml");

             break;

          }

      }

  }

效果如下:

<?xml version="1.0" encoding="UTF-8"?>
 <Department>Automation</Department>

 <Department>Computer</Department>

 <Department>Math</Department>

 <Department>Chinese</Department>

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. 然后调用AddChildElem 在根元素的下面创建元素。

 CMarkup xml;

 xml.SetDoc("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n");

 xml.AddElem("School");

 xml.IntoElem();

 xml.AddElem("Department","Automation");

 xml.AddElem("Department","Computer");

 xml.AddElem("Department","Math");

 xml.AddElem("Department","English");

 xml.OutOfElem();

  xml.Save("School.xml");

效果如下:

<?xml version="1.0" encoding="UTF-8"?>
 <Department>Automation</Department>

 <Department>Computer</Department>

 <Department>Math</Department>

 <Department>English</Department>

2、浏览特定元素

4、添加

4、1 添加在最后面(用AddElem)

 CMarkup xml;

 BOOL bLoadXml=FALSE;

 bLoadXml=xml.Load("School.xml");

if(bLoadXml)

 {
     xml.ResetMainPos();

     xml.FindElem();

     xml.IntoElem();

     xml.AddElem("Department","SiQinghua");

      xml.OutOfElem();

      xml.Save("School.xml");

  }

效果如下:

<?xml version="1.0" encoding="UTF-8"?>
 <Department>Automation</Department>

 <Department>Computer</Department>

 <Department>Math</Department>

 <Department>Chinese</Department>

 <Department>SiQinghua</Department>

4、2 添加在最前面(用InsertElem)

 CMarkup xml;

 BOOL bLoadXml=FALSE;

 bLoadXml=xml.Load("School.xml");

if(bLoadXml)

 {
     xml.ResetMainPos();

     xml.FindElem();

     xml.IntoElem();

     xml.AddElem("Department","SiQinghua");

      xml.OutOfElem();

      xml.Save("School.xml");

  }

效果如下:

<?xml version="1.0" encoding="UTF-8"?>
<Department>NARI</Department>

<Department>Automation</Department>

<Department>Computer</Department>

<Department>Math</Department>

<Department>Chinese</Department>

<Department>SiQinghua</Department>

5、删除

 CMarkup xml;

 BOOL bLoadXml=FALSE;

 bLoadXml=xml.Load("School.xml");

if(bLoadXml)

 {
     BOOL bFind=TRUE;

     xml.ResetMainPos();

    while(bFind)

     {
          bFind=xml.FindChildElem("Department");

         if(bFind)

          {
              CString strData=_T("");

              strData=xml.GetChildData();    //此时节点还是父节点

             if("SiQinghua"==strData)

              {
                  xml.RemoveChildElem();

                  xml.Save("School.xml");

                 break;

              }

          }

      }

  }

效果如下:

<?xml version="1.0" encoding="UTF-8"?>
 <Department>NARI</Department>

 <Department>Automation</Department>

 <Department>Computer</Department>

 <Department>Math</Department>

 <Department>Chinese</Department>

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

 CMarkup xml;

 xml.SetDoc("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");

 xml.AddElem("UserInfo");

 xml.IntoElem();

for(int i=0;i<10;i++)

 {
     CString strID=_T("");

     CString strPwd=_T("");



      srand(UINT(time(NULL)+i)); //产生一个随机数

     int nLevel=rand()%256;



      strID.Format("UserID%02d",i);

      strPwd.Format("UserPwd%02d",i);



      xml.AddElem("User");

      xml.AddAttrib("UserID",strID);

      xml.AddAttrib("UserPwd",strPwd);

      xml.AddAttrib("UserLevel",nLevel);

  }

  xml.OutOfElem();

  xml.Save("UserInfo.xml");

效果如下:

<?xml version="1.0" encoding="UTF-8"?>
<User UserID="UserID00" UserPwd="UserPwd00" UserLevel="85"/>

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

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

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

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

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

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

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

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

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

2、查找特定属性

 CMarkup xml;

 BOOL bLoadXml=FALSE;

 BOOL bFind=FALSE;

 bLoadXml=xml.Load("UserInfo.xml");

if(bLoadXml)

 {
     CString strID;

     CString strPwd;

     xml.ResetMainPos();

      xml.FindElem();    //UserInfo

     while(xml.FindChildElem("User"))

      {
          strID=xml.GetChildAttrib("UserID");

          strPwd=xml.GetChildAttrib("UserPwd");

          TRACE("\n---id:%s,pwd:%s---\n",strID,strPwd);

         if(strID=="UserID02" && strPwd=="UserPwd02")

          {
              bFind=TRUE;

             break;

          }

      }

  }

 if(bFind==TRUE)

      TRACE("\n---find---\n");

 else

      TRACE("\n---not find---\n");

3、修改特定属性

 CMarkup xml;

 BOOL bFind=FALSE;

 BOOL bLoadXml=FALSE;

 bLoadXml=xml.Load("UserInfo.xml");

if(bLoadXml)

 {
     CString strID;

     CString strPwd;

     xml.ResetMainPos();

      xml.FindElem();    //UserInfo

     while(xml.FindChildElem("User"))

      {
          strID=xml.GetChildAttrib("UserID");

          strPwd=xml.GetChildAttrib("UserPwd");

          TRACE("\n--id:%s,pwd:%s--\n",strID,strPwd);

         if(strID=="UserID02" && strPwd=="UserPwd02")

          {
              bFind=TRUE;

              xml.SetChildAttrib("UserID",strID+CString("Modified"));

              xml.Save("UserInfo.xml");

             break;

          }

      }

  }

 if(bFind==TRUE)

      TRACE("\n---find---\n");

 else

      TRACE("\n---not find---\n");

效果如下:

<?xml version="1.0" encoding="UTF-8"?>
<User UserID="UserID00" UserPwd="UserPwd00" UserLevel="85"/>

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

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

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

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

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

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

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

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

 <User UserID="UserID09" UserPwd="UserPwd09" UserLevel="115"/>
VC解析XML--使用CMarkup解析XML (一) 先讲一下XML中的物殊字符,手动填写时注意一下。 字符 字符实体 & &或&#38; ' &apos;或' > >或> < <或&< " "或" (二) CMarkup的源代码。 这是目前的最新版本; 取出里面的Markup.cpp和Markup.h,导入你的工程里面,CMarkup就可以用了; (三) 创建一个XML文档。 CMarkup xml; xml.AddElem( "ORDER" ); xml.AddChildElem( "ITEM" ); xml.IntoElem(); xml.AddChildElem( "SN", "132487A-J" ); xml.AddChildElem( "NAME", "crank casing" ); xml.AddChildElem( "QTY", "1" ); xml.Save("c:\\UserInfo.xml"); 效果如下: <ORDER> <ITEM> <SN>132487A-J</SN> <NAME>crank casing</NAME> <QTY>1</QTY> </ITEM> </ORDER>(四) 浏览特定元素CMarkup xml; xml.Load("UserInfo.xml");while ( xml.FindChildElem("ITEM") ) { xml.IntoElem(); xml.FindChildElem( "SN" ); CString csSN = xml.GetChildData(); xml.FindChildElem( "QTY" ); int nQty = atoi( xml.GetChildData() ); xml.OutOfElem(); }(五)增加元素和属性添加在最后面,使用的是AddElem;添加在最前面,使用InsertElem。CMarkup xml;xml.Load("c:\\UserInfo.xml"); xml.AddElem( "ORDER" ); xml.IntoElem(); // 进入 ORDER xml.AddElem( "ITEM" ); xml.IntoElem(); // 进入 ITEM xml.AddElem( "SN", "4238764-A" ); //添加元素 xml.AddElem( "NAME", "bearing" );//添加元素 xml.AddElem( "QTY", "15" );//添加元素 xml.OutOfElem(); // 退出 ITEM xml.AddElem( "SHIPMENT" ); xml.IntoElem(); // 进入 SHIPMENT xml.AddElem( "POC" );//添加元素 xml.SetAttrib( "type", "non-emergency");//添加属性 xml.IntoElem(); // 进入 POC xml.AddElem( "NAME", "John Smith");//添加元素 xml.AddElem( "TEL", "555-1234");//添加元素 xml.Save("c:\\UserInfo.xml"); 效果如下: <ORDER> <ITEM> <SN>132487A-J</SN> <NAME>crank casing</NAME> <QTY>1</QTY> </ITEM> <ITEM> <SN>4238764-A</SN> <NAME>bearing</NAME> <QTY>15</QTY> </ITEM> <SHIPMENT> <POC type="non-emergency"> <NAME>John Smith</NAME> <TEL>555-1234</TEL> </POC> </SHIPMENT> </ORDER>(六) 修改元素和属性 如将POC中的属性type改成:change; 元素TEL改成:123456789 CMarkup xml; if (xml.Load("UserInfo.xml")) { CString strUserID = _T(""); xml.ResetMainPos(); if (xml.FindChildElem("SHIPMENT")) { xml.IntoElem(); if (xml.FindChildElem("POC")) { xml.IntoElem(); CString str_type=xml.GetAttrib("type"); MessageBox(str_type); xml.SetAttrib("type","change"); strUserID = xml.GetData(); if (xml.FindChildElem("TEL")) { xml.IntoElem(); xml.SetData("123456789"); xml.Save("UserInfo.xml"); return; } } } } (七)删除元素: 删除SN=132487A-J的项目。 CMarkup xml; if (xml.Load("UserInfo.xml")) { CString strUserID = _T(""); xml.ResetMainPos(); if (xml.FindChildElem("ITEM")) { xml.IntoElem(); CString str_sn; xml.FindChildElem("SN"); str_sn=xml.GetChildData(); if(str_sn=="132487A-J") { xml.RemoveElem(); xml.Save("UserInfo.xml"); } } }
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