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Txml.h 自定義了結構體 與對應的類

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View Code typedef?enum?{
????CHOICE_STYLE_OTHER,
????CHOICE_STYLE_TEXT,
????CHOICE_STYLE_IMG

}ChoiceStyle;

typedef?struct?{
????char?CIID;
????ChoiceStyle?EnumChoiceStyle;????????
????char?ChoicePath[MAXPATH];????
????char?ChoiceContent[MAXQCONTENT];

}ChoiceItem;

typedef?struct?{
????char?QID[MAXID];?????
????char?QContent[MAXQCONTENT];
????char?ContentAudio[MAXPATH];
????ChoiceItem?ChoiceItemA;????????????
????ChoiceItem?ChoiceItemB;????????????
????ChoiceItem?ChoiceItemC;????????????
????ChoiceItem?ChoiceItemD;????????
????char?Answer[1];

}QuestionItem; ?

class Txml
{
public:
?Txml();
?~Txml();
private:
?
?QuestionItem QuestionItemArray[MAXARRAYSIZE];
?int QuestionItemArraySize;

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public:

?int LoadXml(const char *XmlFilePath);
?QuestionItem QueryQuestionbyID(char *ID);
?QuestionItem* QueryQuestionArray();

};

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Txml.cpp

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int?Txml::LoadXml(const?char?*XmlFilePath)
{
//加載XmlFilePath
//將其讀到QuestionItemArray中
}

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QuestionItem*?Txml::?QueryQuestionArray()//注意聲明的返回的是自定義結構的指針
{
?????//注意返回的是數組名（地址）
?????//此前犯錯，返回第一個元素QuestionIte[0]
????return?QuestionItemArray;
}

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DLL實現如下：

MyDLL.h

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extern?"C"?__declspec(dllexport)?void??*FillQuestionItem(const?char*?FileName);

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MyDLL.cpp

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void???*FillQuestionItem(const?char*?FileName)
{
????QuestionItem?*QuestionItemP;

????Txml?*objTxml=?new?Txml();
????objTxml->LoadXml(FileName);
????QuestionItemP?=?(objTxml->QueryQuestionArray());????
????return?QuestionItemP;
????
}

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應用層調用的核心部分：

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View Code //加載測試配置文件
void?CMyExam2Dlg::LoadTXml(const?char?*szXmlFileToSave)
{
????typedef?void*??(*pFillQuestionItem)(const?char*?FileName);


????HINSTANCE?HDLL;???????????????????//定義句柄
????
????pFillQuestionItem?FillQuestionItem;????

????HDLL=LoadLibrary(MyDLLPath);???

????//加載動態鏈接庫FIRSTDll.dll文件,注意指明FIRSTDLL的地址哦
????if(HDLL==NULL)?
????????::OutputDebugString("cannot?find?the?dll?file");

????int?my_int?=?*(int*)GetProcAddress(HDLL,?"nMyDLL");
????
????FillQuestionItem=(pFillQuestionItem)GetProcAddress(HDLL,"FillQuestionItem");?

????QuestionItem?*QuestionItemP;
????QuestionItem?QuestionItemP1[10];
????QuestionItemP=(QuestionItem*)FillQuestionItem(szXmlFileToSave?);


????memcpy(QuestionItemP1,?QuestionItemP,?sizeof(QuestionItem)?*?10);????

????FreeLibrary(HDLL);//卸載MyDll.dll文件；
}

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自定義的xml結構

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View Code <?xml?version="1.0"?encoding="gb2312"??>?
-?<resource?id="20110512171112">
-?<Question?id="0">
??<Content>1</Content>?
??<ContentAudio>.\01.mp3</ContentAudio>?
??<Choice?STYLE="TEXT">a</Choice>?
??<Choice?STYLE="TEXT">b</Choice>?
??<Choice?STYLE="TEXT">c</Choice>?
??<Choice?STYLE="TEXT">d</Choice>?
??<Answer>B</Answer>?
??</Question>
-?<Question?id="1">
??<Content>2</Content>?
??<ContentAudio>.\02.mp3</ContentAudio>?
??<Choice?STYLE="TEXT">2</Choice>?
??<Choice?STYLE="TEXT">2</Choice>?
??<Choice?STYLE="TEXT">2</Choice>?
??<Choice?STYLE="TEXT">2</Choice>?
??<Answer>B</Answer>?
??</Question>
......
repeat?more?8?times
</resource>

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PS:

感謝師傅指導.

《新程序員》：云原生和全面數字化實踐50位技術專家共同創作，文字、視頻、音頻交互閱讀

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