Question

vc读取excel 单元格

只要这样一个函数或类, 研究了半天,总是有问题,ado不懂啊. 大概下面这个样子就行. 有源码研究最好. e-mail: pro21ms4@qq.com
class ReadExcel
{
private:
Cstring fileName;
public:
Cstring ReadCell(int x, int)
}

Answer 1

想要通过ODBC直接读、写Excel表格文件，首先，应确保ODBC中已安装有Excel表格文件的驱动"MICROSOFT EXCEL DRIVER (*.XLS)"。然后，可根据下面步骤进行：
1. 在StdAfx.h文件中加入：
#include <afxdb.h>
#include <odbcinst.h>

2. 通过ODBC直接创建Excel文件(暂定文件名：Demo.xls)
//创建并写入Excel文件
void CRWExcel::WriteToExcel()
{
CDatabase database;
CString sDriver = "MICROSOFT EXCEL DRIVER (*.XLS)"; // Excel安装驱动
CString sExcelFile = "c:\\demo.xls"; // 要建立的Excel文件
CString sSql;

TRY
{
// 创建进行存取的字符串
sSql.Format("DRIVER={%s};DSN='';FIRSTROWHASNAMES=1;READONLY=FALSE;CREATE_DB=\"%s\";DBQ=%s",sDriver, sExcelFile, sExcelFile);

// 创建数据库 (既Excel表格文件)
if( database.OpenEx(sSql,CDatabase::noOdbcDialog) )
{
// 创建表结构(姓名、年龄)
sSql = "CREATE TABLE demo (Name TEXT,Age NUMBER)";
database.ExecuteSQL(sSql);

// 插入数值
sSql = "INSERT INTO demo (Name,Age) VALUES ('徐景周',26)";
database.ExecuteSQL(sSql);

sSql = "INSERT INTO demo (Name,Age) VALUES ('徐志慧',22)";
database.ExecuteSQL(sSql);

sSql = "INSERT INTO demo (Name,Age) VALUES ('郭徽',27)";
database.ExecuteSQL(sSql);
}

// 关闭数据库
database.Close();
}
CATCH_ALL(e)
{
TRACE1("Excel驱动没有安装: %s",sDriver);
}
END_CATCH_ALL;
}
3. 通过ODBC直接读取Excel文件(暂定文件名：Demo.xls)
// 读取Excel文件
void CRWExcel::ReadFromExcel()
{
CDatabase database;
CString sSql;
CString sItem1, sItem2;
CString sDriver;
CString sDsn;
CString sFile = "Demo.xls"; // 将被读取的Excel文件名

// 检索是否安装有Excel驱动 "Microsoft Excel Driver (*.xls)"
sDriver = GetExcelDriver();
if (sDriver.IsEmpty())
{
// 没有发现Excel驱动
AfxMessageBox("没有安装Excel驱动!");
return;
}

// 创建进行存取的字符串
sDsn.Format("ODBC;DRIVER={%s};DSN='';DBQ=%s", sDriver, sFile);

TRY
{
// 打开数据库(既Excel文件)
database.Open(NULL, false, false, sDsn);

CRecordset recset(&database);

// 设置读取的查询语句.
sSql = "SELECT Name, Age "
"FROM demo "
"ORDER BY Name ";

// 执行查询语句
recset.Open(CRecordset::forwardOnly, sSql, CRecordset::readOnly);

// 获取查询结果
while (!recset.IsEOF())
{
//读取Excel内部数值
recset.GetFieldValue("Name ", sItem1);
recset.GetFieldValue("Age", sItem2);

// 移到下一行
recset.MoveNext();
}

// 关闭数据库
database.Close();

}
CATCH(CDBException, e)
{
// 数据库操作产生异常时...
AfxMessageBox("数据库错误: " + e->m_strError);
}
END_CATCH;
}

// 获取ODBC中Excel驱动
CString CRWExcel::GetExcelDriver()
{
char szBuf[2001];
WORD cbBufMax = 2000;
WORD cbBufOut;
char *pszBuf = szBuf;
CString sDriver;

// 获取已安装驱动的名称(涵数在odbcinst.h里)
if (!SQLGetInstalledDrivers(szBuf, cbBufMax, &cbBufOut))
return "";

// 检索已安装的驱动是否有Excel...
do
{
if (strstr(pszBuf, "Excel") != 0)
{
//发现 !
sDriver = CString(pszBuf);
break;
}
pszBuf = strchr(pszBuf, '\0') + 1;
}
while (pszBuf[1] != '\0');

return sDriver;
}

Answer 2

你看看我的:
try
{
_Application app; // app is an _Application object.
_Workbook book; // More object declarations.
_Worksheet sheet;
Workbooks books;
Worksheets sheets;
Range range; // Used for Microsoft Excel 97 components.
LPDISPATCH lpDisp; // Often reused variable.
COleVariant
covTrue((short)TRUE),
covFalse((short)FALSE),
covOptional((long)DISP_E_PARAMNOTFOUND, VT_ERROR);
if(!app.CreateDispatch("Excel.Application"))
{
AfxMessageBox("Couldn't CreateDispatch() for Excel");
return;
}
app.SetVisible(TRUE);
lpDisp = app.GetWorkbooks(); // Get an IDispatch pointer.
ASSERT(lpDisp);
books.AttachDispatch(lpDisp); // Attach the IDispatch pointer
// to the books object.
lpDisp = books.Open("C:\\book1.xls", // Test.xls is a workbook.
covOptional, covOptional, covOptional, covOptional, covOptional,
covOptional, covOptional, covOptional, covOptional, covOptional,
covOptional, covOptional, covOptional, covOptional ); // Return Workbook's IDispatch
// pointer.
book.AttachDispatch( lpDisp );
lpDisp = book.GetSheets();

sheets.AttachDispatch(lpDisp);
// Get sheet #1 and attach the IDispatch pointer to your sheet
// object.
lpDisp = sheets.GetItem( COleVariant((short)(1)) );

sheet.AttachDispatch(lpDisp);

lpDisp = sheet.GetRange(COleVariant("A1"), COleVariant("A1"));
// sheet
range.AttachDispatch(lpDisp);
// range.SetNumberFormat(COleVariant("@"));
// range.SetItem(COleVariant((long)(1)),COleVariant((long)(1)),COleVariant(LPCTSTR("000666")));
COleVariant varText = range.GetText();
CString csText;
csText.Format("%s",varText.bstrVal);

// Release dispatch pointers.
range.ReleaseDispatch();
sheet.ReleaseDispatch();
// This is not really necessary because
// the default second parameter of AttachDispatch releases
// when the current scope is lost.

} // End of processing.

catch(COleException *e)
{
char buf[1024]; // For the Try...Catch error message.
sprintf(buf, "COleException. SCODE: %08lx.", (long)e->m_sc);
::MessageBox(NULL, buf, "COleException", MB_SETFOREGROUND | MB_OK);
}

catch(COleDispatchException *e)
{
char buf[1024]; // For the Try...Catch error message.
sprintf(buf,
"COleDispatchException. SCODE: %08lx, Description: \"%s\".",
(long)e->m_wCode,(LPSTR)e->m_strDescription.GetBuffer(512));
::MessageBox(NULL, buf, "COleDispatchException",
MB_SETFOREGROUND | MB_OK);
}

catch(...)
{
::MessageBox(NULL, "General Exception caught.", "Catch-All",
MB_SETFOREGROUND | MB_OK);
}

你要int的话就转换varText吧.祝你好运