xml以字符指针格式获取文本 [英] xml get text in character pointer format

问题描述

大家好，

我在解析xml时遇到问题. xml的结构是

Hi all,

I am facing a problem in parsing a xml. The structure of xml is

<root>
<node>
<child>abc</child>
<child>def</child>
</node>
<node>
<child>ghi</child>
<child>jkl</child>
</node>
</root>

我正在为解析xml放置一个循环，但是它不起作用

I am putting a loop for parsing the xml but it is not working

for (IXMLDOMNodePtr pChild = node->firstChild; pChild != NULL; pChild = pChild->nextSibling) {
               char* result;
               if ( strcmp(pChild->nodeName, "Child") == 0 ) {
                   char* str = pChild->text;
                   sprintf( targetStr, str );
                   sprintf( result, "%dName", i+1);
                   SetEnvironmentVariable( result, targetStr);
               }

}

它给出了错误

}

It is giving an error

error C2451: conditional expression of type 'const struct MSXML2::IXMLDOMNodeList' is illegal
        No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called
        C:\Program Files\Microsoft Visual Studio\MyProjects\wintray\EnpaqStatus\linkState.cpp(67) : see reference to function template instantiation '__thiscall _com_ptr_t<class _com_IIID<struct MSXML2::IXMLDOMNode,&struct __s_GUID _GUID_2933bf80_7b

36_11d2_b20e_00c04f983e60> >::_com_ptr_t<class _com_IIID<struct MSXML2::IXMLDOMNode,&struct __s_GUID _GUID_2933bf80_7b36_11d2_b20e_00c04f983e60> >(const struct MSXML2::IXMLDOMNodeList &)' being compiled

我的问题是如何将结构类型转换为const char *


在此先感谢

My Problem is How to convert the structure type into const char*


Thanks in advance

推荐答案

这里的问题在
行中 char * str = pChild-> text;

在此先感谢

The problem here is in the line
char* str = pChild->text;

Thanks in Advance

获得解决方案
在第
行下更改 char * str = pChild-> text;
与
_bstr_t text = pChild-> text;
char * str =文本；

谢谢大家的帮助.

Got the solution
It is change below line
char* str = pChild->text;
with
_bstr_t text = pChild->text;
char* str = text;

Thanks all for help.

在尝试解决指针问题之前，建议您先解决基础知识:这可能会使您的问题消失.

Before you try to fix your pointer problem, I suggest you fix the basics: it may make your problem disappear.

char* result;
if ( strcmp(pChild->nodeName, "Child") == 0 ) {
    char* str = pChild->text;
    sprintf( targetStr, str );
    sprintf( result, "%dName", i+1);

除非您分配一个到result的某个大小的缓冲区，sprintf调用将写入哪里?

Unless you assign a buffer of some size to result the sprintf call will write to where?

这篇关于xml以字符指针格式获取文本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IT屋！