Qt导出Excel的简单实现
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QAxObject对COM对象进行了封装,QAxObject派生自QAxBase,而后者提供了一组API通过IUnknown(不清楚IUnknown的同学可以去看看COM对象模型)指针直接访问COM对象,我们这里讲的excel也是一个COM对象,因此我们可以通过QAxObject来操作它,为了便于理解,我们首先了解一下excel的对象的主要层次结构:
上图是excel对象的层次结构,1个excel就有1个Application对象,1个Application对象由多个Workbook对象组成,这些Workbook对象由Workbooks对象统一管理,Workbook对象下可以包含若干个Worksheet,这些Worksheet对象也有一个WorkSheets对象来统一管理,接下来是Range对象,这个对象就对应Worksheet里的表格单元了,好了大家应该清楚了Excel的对象的主要层次结构了吧,下面我们来看看QAxObject是怎么来导出excel的:
1.新建一个excel
QAxObject *pApplication = NULL;QAxObject *pWorkBooks = NULL;QAxObject *pWorkBook = NULL;QAxObject *pSheets = NULL;QAxObject *pSheet = NULL;void newExcel(const QString &fileName){pApplication = new QAxObject();pApplication->setControl("Excel.Application");//连接Excel控件pApplication->dynamicCall("SetVisible(bool)", false);//false不显示窗体pApplication->setProperty("DisplayAlerts", false);//不显示任何警告信息。pWorkBooks = pApplication->querySubObject("Workbooks");QFile file(fileName);if (file.exists()){pWorkBook = pWorkBooks->querySubObject("Open(const QString &)", fileName);}else{pWorkBooks->dynamicCall("Add");pWorkBook = pApplication->querySubObject("ActiveWorkBook");}pSheets = pWorkBook->querySubObject("Sheets");pSheet = pSheets->querySubObject("Item(int)", 1);}
2.增加1个Worksheet
void appendSheet(const QString &sheetName){QAxObject *pLastSheet = pSheets->querySubObject("Item(int)", cnt);pSheets->querySubObject("Add(QVariant)", pLastSheet->asVariant());pSheet = pSheets->querySubObject("Item(int)", cnt);pLastSheet->dynamicCall("Move(QVariant)", pSheet->asVariant());pSheet->setProperty("Name", sheetName);}
3.向Excel单元格中写入数据
void setCellValue(int row, int column, const QString &value){QAxObject *pRange = pSheet->querySubObject("Cells(int,int)", row, column);range->dynamicCall("Value", value);}
4.保存Excel
void saveExcel(constQString &fileName)
{pWorkBook->dynamicCall("SaveAs(const QString &)",QDir::toNativeSeparators(fileName));}
5.释放Excel
void freeExcel()
{if (pApplication != NULL){pApplication->dynamicCall("Quit()");delete pApplication;pApplication = NULL;}}
http://blog.csdn.net/rabinsong/article/details/8571021
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