QT开发应用程序（17）-- 读写XLS文件

请注意，在工程文件pro里，增加CONFIG += qaxcontainer。
有的网帖上写的是CONFIG += axcontainer，经测试，通不过。
或者在工程配置如下图修改：

源代码：

#ifndef QTEXCEL_H
#define QTEXCEL_H

#include 
#include 
#include 
#include 
#include 
#include 
#include 

typedef unsigned int UINT;
class QtExcel
{
public:
	QtExcel();
	QtExcel(QString xlsFile);
	~QtExcel();
public:
	bool Open(UINT nSheet = 1, bool visible = false);          //打开xls文件
	bool Open(QString xlsFile, UINT nSheet = 1, bool visible = false);
	void Save();                                              //保存xls报表
	void Close();                                             //关闭xls报表
	QVariant GetCellData(UINT row, UINT column);               //获取指定单元数据
	QVariantList GetCellData(QString strRange);	//获取多个单元数据，写法为“A2:C60”
	bool SetCellData(UINT row, UINT column, QVariant data); //修改指定单元数据
	bool IsOpen();
	bool IsValid();
protected:
	void Clear();
private:
	QAxObject *m_pExcel;       //指向整个excel应用程序
	QAxObject *m_pWorkbooks;   //指向工作簿集,excel有很多工作簿
	QAxObject *m_pWorkbook;    //指向sXlsFile对应的工作簿
	QAxObject *m_pWorksheet;   //指向工作簿中的某个sheet表单
	QString   m_strXlsFile;      //xls文件路径
	UINT      m_nCurrSheet;    //当前打开的第几个sheet
	bool      m_bIsVisible;    //excel是否可见
	int       m_nRowCount;     //行数
	int       m_nColumnCount;  //列数
	int       m_nStartRow;     //开始有数据的行下标值
	int       m_nStartColumn;  //开始有数据的列下标值
	bool      m_bIsOpen;       //是否已打开
	bool      m_bIsValid;      //是否有效
	bool      m_bIsANewFile;   //是否是一个新建xls文件，用来区分打开的excel是已存在文件还是有本类新建的
	bool      m_bIsSaveAlready;//防止重复保存
};
#endif // QTEXCEL_H

源文件CPP

#include "QtExceL.h"
#include 

QtExcel::QtExcel()
{
	m_pExcel = NULL;
	m_pWorkbooks = NULL;
	m_pWorkbook = NULL;
	m_pWorksheet = NULL;
	m_strXlsFile = "";
	m_nRowCount = 0;
	m_nColumnCount = 0;
	m_nStartRow = 0;
	m_nStartColumn = 0;
	m_bIsOpen = false;
	m_bIsValid = false;
	m_bIsANewFile = false;
	m_bIsSaveAlready = false;
	HRESULT r = OleInitialize(0);
	if (r != S_OK && r != S_FALSE)
	{
		qDebug("Qt: Could not initialize OLE (error %x)", (unsigned int)r);
	}
}

QtExcel::QtExcel(QString xlsFile)
{
	m_pExcel = NULL;
	m_pWorkbooks = NULL;
	m_pWorkbook = NULL;
	m_pWorksheet = NULL;
	m_strXlsFile = xlsFile;
	m_nRowCount = 0;
	m_nColumnCount = 0;
	m_nStartRow = 0;
	m_nStartColumn = 0;
	m_bIsOpen = false;
	m_bIsValid = false;
	m_bIsANewFile = false;
	m_bIsSaveAlready = false;
	HRESULT r = OleInitialize(0);
	if (r != S_OK && r != S_FALSE)
	{
		qDebug("Qt: Could not initialize OLE (error %x)", (unsigned int)r);
	}
}
QtExcel::~QtExcel()
{
	if (m_bIsOpen)
	{
		//析构前，先保存数据，然后关闭workbook
		Close();
	}
	OleUninitialize();
}

bool QtExcel::Open(UINT nSheet, bool visible)
{
	if (m_bIsOpen)
	{
		Close();
	}
	m_nCurrSheet = nSheet;
	m_bIsVisible = visible;
	if (NULL == m_pExcel)
	{
		m_pExcel = new QAxObject("Excel.Application");
		if (m_pExcel)
		{
			m_bIsValid = true;
		}
		else
		{
			m_bIsValid = false;
			m_bIsOpen = false;
			return m_bIsOpen;
		}
		m_pExcel->dynamicCall("SetVisible(bool)", m_bIsVisible);
	}
	if (!m_bIsValid)
	{
		m_bIsOpen = false;
		return m_bIsOpen;
	}

	if (m_strXlsFile.isEmpty())
	{
		m_bIsOpen = false;
		return m_bIsOpen;
	}
	/*如果指向的文件不存在，则需要新建一个*/
	QFile f(m_strXlsFile);
	if (!f.exists())
	{
		m_bIsANewFile = true;
	}
	else
	{
		m_bIsANewFile = false;
	}

	if (!m_bIsANewFile)
	{
		m_pWorkbooks = m_pExcel->querySubObject("WorkBooks"); //获取工作簿
		m_pWorkbook = m_pWorkbooks->querySubObject("Open(QString, QVariant)", m_strXlsFile, QVariant(0)); //打开xls对应的工作簿
	}
	else
	{
		m_pWorkbooks = m_pExcel->querySubObject("WorkBooks");      //获取工作簿
		m_pWorkbooks->dynamicCall("Add");                        //添加一个新的工作薄
		m_pWorkbook = m_pExcel->querySubObject("ActiveWorkBook"); //新建一个xls
	}
	m_pWorksheet = m_pWorkbook->querySubObject("WorkSheets(int)", m_nCurrSheet);//打开第一个sheet
																				//至此已打开，开始获取相应属性
	QAxObject *usedrange = m_pWorksheet->querySubObject("UsedRange");       //获取该sheet的使用范围对象
	QAxObject *rows = usedrange->querySubObject("Rows");
	QAxObject *columns = usedrange->querySubObject("Columns");

	//因为excel可以从任意行列填数据而不一定是从0,0开始，因此要获取首行列下标
	m_nStartRow = usedrange->property("Row").toInt();    //第一行的起始位置
	m_nStartColumn = usedrange->property("Column").toInt(); //第一列的起始位置
	m_nRowCount = rows->property("Count").toInt();       //获取行数
	m_nColumnCount = columns->property("Count").toInt();    //获取列数
	m_bIsOpen = true;
	return m_bIsOpen;
}

bool QtExcel::Open(QString xlsFile, UINT nSheet, bool visible)
{
	m_strXlsFile = xlsFile;
	m_nCurrSheet = nSheet;
	m_bIsVisible = visible;
	return Open(m_nCurrSheet, m_bIsVisible);
}


void QtExcel::Save()
{
	if (m_pWorkbook)
	{
		if (m_bIsSaveAlready)
		{
			return;
		}
		if (!m_bIsANewFile)
		{
			m_pWorkbook->dynamicCall("Save()");
		}
		else /*如果该文档是新建出来的，则使用另存为COM接口*/
		{
			m_pWorkbook->dynamicCall("SaveAs (const QString&,int,const QString&,const QString&,bool,bool)",
				m_strXlsFile, 56, QString(""), QString(""), false, false);
		}
		m_bIsSaveAlready = true;
	}
}

void QtExcel::Close()
{
	Save();//关闭前先保存数据
	if (m_pExcel && m_pWorkbook)
	{
		m_pWorkbook->dynamicCall("Close(bool)", true);
		m_pExcel->dynamicCall("Quit()");
		delete m_pExcel;
		m_pExcel = NULL;
		m_bIsOpen = false;
		m_bIsValid = false;
		m_bIsANewFile = false;
		m_bIsSaveAlready = true;
	}
}

QVariant QtExcel::GetCellData(UINT row, UINT column)
{
	QVariant data;
	QAxObject *cell = m_pWorksheet->querySubObject("Cells(int,int)", row, column);//获取单元格对象
	if (cell)
	{
		data = cell->dynamicCall("Value2()");
	}
	return data;
}

QVariantList QtExcel::GetCellData(QString strRange)
{
	QVariantList data;
	// strRange = "a1:C10"
	QAxObject *cell = m_pWorksheet->querySubObject("Range(QString)", strRange);//获取单元格对象
	if (cell)
	{
		data = cell->property("Value").toList();
	}
	return data;
}

bool QtExcel::SetCellData(UINT row, UINT column, QVariant data)
{
	bool op = false;
	QAxObject *cell = m_pWorksheet->querySubObject("Cells(int,int)", row, column);//获取单元格对象
	if (cell)
	{
		QString strData = data.toString(); //excel 居然只能插入字符串和整型，浮点型无法插入
		cell->dynamicCall("SetValue(const QVariant&)", strData); //修改单元格的数据
		op = true;
	}
	else
	{
		op = false;
	}

	return op;
}

void QtExcel::Clear()
{
	m_strXlsFile = "";
	m_nRowCount = 0;
	m_nColumnCount = 0;
	m_nStartRow = 0;
	m_nStartColumn = 0;
}

bool QtExcel::IsOpen()
{
	return m_bIsOpen;
}
bool QtExcel::IsValid()
{
	return m_bIsValid;
}