c++处理excel
文件加入到工程目录下即可:CSpreadSheet.h文件在vs的mfc工程下运行.
// Class to read and write to Excel and text delimited spreadsheet // // Created by Yap Chun Wei // December 2001 // // Version 1.1 // Updates: Fix bug in ReadRow() which prevent reading of single column spreadsheet // Modified by jingzhou xu #ifndef CSPREADSHEET_H #define CSPREADSHEET_H #include <odbcinst.h> #include <afxdb.h> class CSpreadSheet { public: CSpreadSheet(CString File, CString SheetOrSeparator, bool Backup = true); // Open spreadsheet for reading and writing ~CSpreadSheet(); // Perform some cleanup functions bool AddHeaders(CStringArray &FieldNames, bool replace = false); // Add header row to spreadsheet bool DeleteSheet(); // Clear text delimited file content bool DeleteSheet(CString SheetName); // Clear entire Excel spreadsheet content. The sheet itself is not deleted bool AddRow(CStringArray &RowValues, long row = 0, bool replace = false); // Insert or replace a row into spreadsheet. Default is add new row. bool AddCell(CString CellValue, CString column, long row = 0, bool Auto = true); // Replace or add a cell into Excel spreadsheet using header row or column alphabet. Default is add cell into new row. Set Auto to false if want to force column to be used as header name bool AddCell(CString CellValue, short column, long row = 0); // Replace or add a cell into spreadsheet using column number. Default is add cell into new row. bool ReplaceRows(CStringArray &NewRowValues, CStringArray &OldRowValues); // Search and replace rows in Excel spreadsheet bool ReadRow(CStringArray &RowValues, long row = 0); // Read a row from spreadsheet. Default is read the next row bool ReadColumn(CStringArray &ColumnValues, CString column, bool Auto = true); // Read a column from Excel spreadsheet using header row or column alphabet. Set Auto to false if want to force column to be used as header name bool ReadColumn(CStringArray &ColumnValues, short column); // Read a column from spreadsheet using column number bool ReadCell (CString &CellValue, CString column, long row = 0, bool Auto = true); // Read a cell from Excel spreadsheet using header row or column alphabet. Default is read the next cell in next row. Set Auto to false if want to force column to be used as header name bool ReadCell (CString &CellValue, short column, long row = 0); // Read a cell from spreadsheet using column number. Default is read the next cell in next row. void BeginTransaction(); // Begin transaction bool Commit(); // Save changes to spreadsheet bool RollBack(); // Undo changes to spreadsheet bool Convert(CString SheetOrSeparator); inline void GetFieldNames (CStringArray &FieldNames) {FieldNames.RemoveAll(); FieldNames.Copy(m_aFieldNames);} // Get the header row from spreadsheet inline long GetTotalRows() {return m_dTotalRows;} // Get total number of rows in spreadsheet inline short GetTotalColumns() {return m_dTotalColumns;} // Get total number of columns in spreadsheet inline long GetCurrentRow() {return m_dCurrentRow;} // Get the currently selected row in spreadsheet inline bool GetBackupStatus() {return m_bBackup;} // Get status of backup. True if backup is successful, False if spreadsheet is not backup inline bool GetTransactionStatus() {return m_bTransaction;} // Get status of Transaction. True if Transaction is started, False if Transaction is not started or has error in starting inline CString GetLastError() {return m_sLastError;} // Get last error message private: bool Open(); // Open a text delimited file for reading or writing void GetExcelDriver(); // Get the name of the Excel-ODBC driver short CalculateColumnNumber(CString column, bool Auto); // Convert Excel column in alphabet into column number bool m_bAppend; // Internal flag to denote newly created spreadsheet or previously created spreadsheet bool m_bBackup; // Internal flag to denote status of Backup bool m_bExcel; // Internal flag to denote whether file is Excel spreadsheet or text delimited spreadsheet bool m_bTransaction; // Internal flag to denote status of Transaction long m_dCurrentRow; // Index of current row, starting from 1 long m_dTotalRows; // Total number of rows in spreadsheet short m_dTotalColumns; // Total number of columns in Excel spreadsheet. Largest number of columns in text delimited spreadsheet CString m_sSql; // SQL statement to open Excel spreadsheet for reading CString m_sDsn; // DSN string to open Excel spreadsheet for reading and writing CString m_stempSql; // Temporary string for SQL statements or for use by functions CString m_stempString; // Temporary string for use by functions CString m_sSheetName; // Sheet name of Excel spreadsheet CString m_sExcelDriver; // Name of Excel Driver CString m_sFile; // Spreadsheet file name CString m_sSeparator; // Separator in text delimited spreadsheet CString m_sLastError; // Last error message CStringArray m_atempArray; // Temporary array for use by functions CStringArray m_aFieldNames; // Header row in spreadsheet CStringArray m_aRows; // Content of all the rows in spreadsheet CDatabase *m_Database; // Database variable for Excel spreadsheet CRecordset *m_rSheet; // Recordset for Excel spreadsheet }; // Open spreadsheet for reading and writing CSpreadSheet::CSpreadSheet(CString File, CString SheetOrSeparator, bool Backup) : m_Database(NULL), m_rSheet(NULL), m_sFile(File), m_dTotalRows(0), m_dTotalColumns(0), m_dCurrentRow(1), m_bAppend(false), m_bBackup(Backup), m_bTransaction(false) { // Detect whether file is an Excel spreadsheet or a text delimited file m_stempString = m_sFile.Right(4); m_stempString.MakeLower(); if (m_stempString == ".xls") // File is an Excel spreadsheet { m_bExcel = true; m_sSheetName = SheetOrSeparator; m_sSeparator = ",;.?"; } else // File is a text delimited file { m_bExcel = false; m_sSeparator = SheetOrSeparator; } if (m_bExcel) // If file is an Excel spreadsheet { m_Database = new CDatabase; GetExcelDriver(); m_sDsn.Format("DRIVER={%s};DSN='';FIRSTROWHASNAMES=1;READONLY=FALSE;CREATE_DB=\"%s\";DBQ=%s", m_sExcelDriver, m_sFile, m_sFile); if (Open()) { if (m_bBackup) { if ((m_bBackup) && (m_bAppend)) { CString tempSheetName = m_sSheetName; m_sSheetName = "CSpreadSheetBackup"; m_bAppend = false; if (!Commit()) { m_bBackup = false; } m_bAppend = true; m_sSheetName = tempSheetName; m_dCurrentRow = 1; } } } } else // if file is a text delimited file { if (Open()) { if ((m_bBackup) && (m_bAppend)) { m_stempString = m_sFile; m_stempSql.Format("%s.bak", m_sFile); m_sFile = m_stempSql; if (!Commit()) { m_bBackup = false; } m_sFile = m_stempString; } } } } // Perform some cleanup functions CSpreadSheet::~CSpreadSheet() { if (m_Database != NULL) { m_Database->Close(); delete m_Database; } } // Add header row to spreadsheet bool CSpreadSheet::AddHeaders(CStringArray &FieldNames, bool replace) { if (m_bAppend) // Append to old Sheet { if (replace) // Replacing header row rather than adding new columns { if (!AddRow(FieldNames, 1, true)) { return false; } else { return true; } } if (ReadRow(m_atempArray, 1)) // Add new columns { if (m_bExcel) { // Check for duplicate header row field for (int i = 0; i < FieldNames.GetSize(); i++) { for (int j = 0; j < m_atempArray.GetSize(); j++) { if (FieldNames.GetAt(i) == m_atempArray.GetAt(j)) { m_sLastError.Format("Duplicate header row field:%s\n", FieldNames.GetAt(i)); return false; } } } } m_atempArray.Append(FieldNames); if (!AddRow(m_atempArray, 1, true)) { m_sLastError = "Problems with adding headers\n"; return false; } // Update largest number of columns if necessary if (m_atempArray.GetSize() > m_dTotalColumns) { m_dTotalColumns = m_atempArray.GetSize(); } return true; } return false; } else // New Sheet { m_dTotalColumns = FieldNames.GetSize(); if (!AddRow(FieldNames, 1, true)) { return false; } else { m_dTotalRows = 1; return true; } } } // Clear text delimited file content bool CSpreadSheet::DeleteSheet() { if (m_bExcel) { if (DeleteSheet(m_sSheetName)) { return true; } else { m_sLastError = "Error deleting sheet\n"; return false; } } else { m_aRows.RemoveAll(); m_aFieldNames.RemoveAll(); m_dTotalColumns = 0; m_dTotalRows = 0; if (!m_bTransaction) { Commit(); } m_bAppend = false; // Set flag to new sheet return true; } } // Clear entire Excel spreadsheet content. The sheet itself is not deleted bool CSpreadSheet::DeleteSheet(CString SheetName) { if (m_bExcel) // If file is an Excel spreadsheet { // Delete sheet m_Database->OpenEx(m_sDsn, CDatabase::noOdbcDialog); SheetName = "[" + SheetName + "$A1:IV65536]"; m_stempSql.Format ("DROP TABLE %s", SheetName); try { m_Database->ExecuteSQL(m_stempSql); m_Database->Close(); m_aRows.RemoveAll(); m_aFieldNames.RemoveAll(); m_dTotalColumns = 0; m_dTotalRows = 0; } catch(CDBException *e) { m_sLastError = e->m_strError; m_Database->Close(); return false; } return true; } else // if file is a text delimited file { return DeleteSheet(); } } // Insert or replace a row into spreadsheet. // Default is add new row. bool CSpreadSheet::AddRow(CStringArray &RowValues, long row, bool replace) { long tempRow; if (row == 1) { if (m_bExcel) { // Check for duplicate header row field for Excel spreadsheet for (int i = 0; i < RowValues.GetSize(); i++) { for (int j = 0; j < RowValues.GetSize(); j++) { if ((i != j) && (RowValues.GetAt(i) == RowValues.GetAt(j))) { m_sLastError.Format("Duplicate header row field:%s\n", RowValues.GetAt(i)); return false; } } } // Check for reduced header row columns if (RowValues.GetSize() < m_dTotalColumns) { m_sLastError = "Number of columns in new header row cannot be less than the number of columns in previous header row"; return false; } m_dTotalColumns = RowValues.GetSize(); } // Update header row m_aFieldNames.RemoveAll(); m_aFieldNames.Copy(RowValues); } else { if (m_bExcel) { if (m_dTotalColumns == 0) { m_sLastError = "No header row. Add header row first\n"; return false; } } } if (m_bExcel) // For Excel spreadsheet { if (RowValues.GetSize() > m_aFieldNames.GetSize()) { m_sLastError = "Number of columns to be added cannot be greater than the number of fields\n"; return false; } } else // For text delimited spreadsheet { // Update largest number of columns if necessary if (RowValues.GetSize() > m_dTotalColumns) { m_dTotalColumns = RowValues.GetSize(); } } // Convert row values m_stempString.Empty(); for (int i = 0; i < RowValues.GetSize(); i++) { if (i != RowValues.GetSize()-1) // Not last column { m_stempSql.Format("\"%s\"%s", RowValues.GetAt(i), m_sSeparator); m_stempString += m_stempSql; } else // Last column { m_stempSql.Format("\"%s\"", RowValues.GetAt(i)); m_stempString += m_stempSql; } } if (row) { if (row <= m_dTotalRows) // Not adding new rows { if (replace) // Replacing row { m_aRows.SetAt(row-1, m_stempString); } else // Inserting row { m_aRows.InsertAt(row-1, m_stempString); m_dTotalRows++; } if (!m_bTransaction) { Commit(); } return true; } else // Adding new rows { // Insert null rows until specified row m_dCurrentRow = m_dTotalRows; m_stempSql.Empty(); CString nullString; for (int i = 1; i <= m_dTotalColumns; i++) { if (i != m_dTotalColumns) { if (m_bExcel) { nullString.Format("\" \"%s", m_sSeparator); } else { nullString.Format("\"\"%s", m_sSeparator); } m_stempSql += nullString; } else { if (m_bExcel) { m_stempSql += "\" \""; } else { m_stempSql += "\"\""; } } } for (int j = m_dTotalRows + 1; j < row; j++) { m_dCurrentRow++; m_aRows.Add(m_stempSql); } } } else { tempRow = m_dCurrentRow; m_dCurrentRow = m_dTotalRows; } // Insert new row m_dCurrentRow++; m_aRows.Add(m_stempString); if (row > m_dTotalRows) { m_dTotalRows = row; } else if (!row) { m_dTotalRows = m_dCurrentRow; m_dCurrentRow = tempRow; } if (!m_bTransaction) { Commit(); } return true; } // Replace or add a cell into Excel spreadsheet using header row or column alphabet. // Default is add cell into new row. // Set Auto to false if want to force column to be used as header name bool CSpreadSheet::AddCell(CString CellValue, CString column, long row, bool Auto) { short columnIndex = CalculateColumnNumber(column, Auto); if (columnIndex == 0) { return false; } if (AddCell(CellValue, columnIndex, row)) { return true; } return false; } // Replace or add a cell into spreadsheet using column number // Default is add cell into new row. bool CSpreadSheet::AddCell(CString CellValue, short column, long row) { if (column == 0) { m_sLastError = "Column cannot be zero\n"; return false; } long tempRow; if (m_bExcel) // For Excel spreadsheet { if (column > m_aFieldNames.GetSize() + 1) { m_sLastError = "Cell column to be added cannot be greater than the number of fields\n"; return false; } } else // For text delimited spreadsheet { // Update largest number of columns if necessary if (column > m_dTotalColumns) { m_dTotalColumns = column; } } if (row) { if (row <= m_dTotalRows) { ReadRow(m_atempArray, row); // Change desired row m_atempArray.SetAtGrow(column-1, CellValue); if (row == 1) { if (m_bExcel) // Check for duplicate header row field { for (int i = 0; i < m_atempArray.GetSize(); i++) { for (int j = 0; j < m_atempArray.GetSize(); j++) { if ((i != j) && (m_atempArray.GetAt(i) == m_atempArray.GetAt(j))) { m_sLastError.Format("Duplicate header row field:%s\n", m_atempArray.GetAt(i)); return false; } } } } // Update header row m_aFieldNames.RemoveAll(); m_aFieldNames.Copy(m_atempArray); } if (!AddRow(m_atempArray, row, true)) { return false; } if (!m_bTransaction) { Commit(); } return true; } else { // Insert null rows until specified row m_dCurrentRow = m_dTotalRows; m_stempSql.Empty(); CString nullString; for (int i = 1; i <= m_dTotalColumns; i++) { if (i != m_dTotalColumns) { if (m_bExcel) { nullString.Format("\" \"%s", m_sSeparator); } else { nullString.Format("\"\"%s", m_sSeparator); } m_stempSql += nullString; } else { if (m_bExcel) { m_stempSql += "\" \""; } else { m_stempSql += "\"\""; } } } for (int j = m_dTotalRows + 1; j < row; j++) { m_dCurrentRow++; m_aRows.Add(m_stempSql); } } } else { tempRow = m_dCurrentRow; m_dCurrentRow = m_dTotalRows; } // Insert cell m_dCurrentRow++; m_stempString.Empty(); for (int j = 1; j <= m_dTotalColumns; j++) { if (j != m_dTotalColumns) // Not last column { if (j != column) { if (m_bExcel) { m_stempSql.Format("\" \"%s", m_sSeparator); } else { m_stempSql.Format("\"\"%s", m_sSeparator); } m_stempString += m_stempSql; } else { m_stempSql.Format("\"%s\"%s", CellValue, m_sSeparator); m_stempString += m_stempSql; } } else // Last column { if (j != column) { if (m_bExcel) { m_stempString += "\" \""; } else { m_stempString += "\"\""; } } else { m_stempSql.Format("\"%s\"", CellValue); m_stempString += m_stempSql; } } } m_aRows.Add(m_stempString); if (row > m_dTotalRows) { m_dTotalRows = row; } else if (!row) { m_dTotalRows = m_dCurrentRow; m_dCurrentRow = tempRow; } if (!m_bTransaction) { Commit(); } return true; } // Search and replace rows in Excel spreadsheet bool CSpreadSheet::ReplaceRows(CStringArray &NewRowValues, CStringArray &OldRowValues) { if (m_bExcel) // If file is an Excel spreadsheet { m_Database->OpenEx(m_sDsn, CDatabase::noOdbcDialog); m_stempSql.Format("UPDATE [%s] SET ", m_sSheetName); for (int i = 0; i < NewRowValues.GetSize(); i++) { m_stempString.Format("[%s]='%s', ", m_aFieldNames.GetAt(i), NewRowValues.GetAt(i)); m_stempSql = m_stempSql + m_stempString; } m_stempSql.Delete(m_stempSql.GetLength()-2, 2); m_stempSql = m_stempSql + " WHERE ("; for (int j = 0; j < OldRowValues.GetSize()-1; j++) { m_stempString.Format("[%s]='%s' AND ", m_aFieldNames.GetAt(j), OldRowValues.GetAt(j)); m_stempSql = m_stempSql + m_stempString; } m_stempSql.Delete(m_stempSql.GetLength()-4, 5); m_stempSql += ")"; try { m_Database->ExecuteSQL(m_stempSql); m_Database->Close(); Open(); return true; } catch(CDBException *e) { m_sLastError = e->m_strError; m_Database->Close(); return false; } } else // if file is a text delimited file { m_sLastError = "Function not available for text delimited file\n"; return false; } } // Read a row from spreadsheet. // Default is read the next row bool CSpreadSheet::ReadRow(CStringArray &RowValues, long row) { // Check if row entered is more than number of rows in sheet if (row <= m_aRows.GetSize()) { if (row != 0) { m_dCurrentRow = row; } else if (m_dCurrentRow > m_aRows.GetSize()) { return false; } // Read the desired row RowValues.RemoveAll(); m_stempString = m_aRows.GetAt(m_dCurrentRow-1); m_dCurrentRow++; // Search for separator to split row int separatorPosition; m_stempSql.Format("\"%s\"", m_sSeparator); separatorPosition = m_stempString.Find(m_stempSql); // If separator is "?" if (separatorPosition != -1) { // Save columns int nCount = 0; int stringStartingPosition = 0; while (separatorPosition != -1) { nCount = separatorPosition - stringStartingPosition; RowValues.Add(m_stempString.Mid(stringStartingPosition, nCount)); stringStartingPosition = separatorPosition + m_stempSql.GetLength(); separatorPosition = m_stempString.Find(m_stempSql, stringStartingPosition); } nCount = m_stempString.GetLength() - stringStartingPosition; RowValues.Add(m_stempString.Mid(stringStartingPosition, nCount)); // Remove quotes from first column m_stempString = RowValues.GetAt(0); m_stempString.Delete(0, 1); RowValues.SetAt(0, m_stempString); // Remove quotes from last column m_stempString = RowValues.GetAt(RowValues.GetSize()-1); m_stempString.Delete(m_stempString.GetLength()-1, 1); RowValues.SetAt(RowValues.GetSize()-1, m_stempString); return true; } else { // Save columns separatorPosition = m_stempString.Find(m_sSeparator); // if separator is ? if (separatorPosition != -1) { int nCount = 0; int stringStartingPosition = 0; while (separatorPosition != -1) { nCount = separatorPosition - stringStartingPosition; RowValues.Add(m_stempString.Mid(stringStartingPosition, nCount)); stringStartingPosition = separatorPosition + m_sSeparator.GetLength(); separatorPosition = m_stempString.Find(m_sSeparator, stringStartingPosition); } nCount = m_stempString.GetLength() - stringStartingPosition; RowValues.Add(m_stempString.Mid(stringStartingPosition, nCount)); return true; } else // Treat spreadsheet as having one column { // Remove opening and ending quotes if any int quoteBegPos = m_stempString.Find('\"'); int quoteEndPos = m_stempString.ReverseFind('\"'); if ((quoteBegPos == 0) && (quoteEndPos == m_stempString.GetLength()-1)) { m_stempString.Delete(0, 1); m_stempString.Delete(m_stempString.GetLength()-1, 1); } RowValues.Add(m_stempString); } } } m_sLastError = "Desired row is greater than total number of rows in spreadsheet\n"; return false; } // Read a column from Excel spreadsheet using header row or column alphabet. // Set Auto to false if want to force column to be used as header name bool CSpreadSheet::ReadColumn(CStringArray &ColumnValues, CString column, bool Auto) { short columnIndex = CalculateColumnNumber(column, Auto); if (columnIndex == 0) { return false; } if (ReadColumn(ColumnValues, columnIndex)) { return true; } return false; } // Read a column from spreadsheet using column number bool CSpreadSheet::ReadColumn(CStringArray &ColumnValues, short column) { if (column == 0) { m_sLastError = "Column cannot be zero\n"; return false; } int tempRow = m_dCurrentRow; m_dCurrentRow = 1; ColumnValues.RemoveAll(); for (int i = 1; i <= m_aRows.GetSize(); i++) { // Read each row if (ReadRow(m_atempArray, i)) { // Get value of cell in desired column if (column <= m_atempArray.GetSize()) { ColumnValues.Add(m_atempArray.GetAt(column-1)); } else { ColumnValues.Add(""); } } else { m_dCurrentRow = tempRow; m_sLastError = "Error reading row\n"; return false; } } m_dCurrentRow = tempRow; return true; } // Read a cell from Excel spreadsheet using header row or column alphabet. // Default is read the next cell in next row. // Set Auto to false if want to force column to be used as header name bool CSpreadSheet::ReadCell (CString &CellValue, CString column, long row, bool Auto) { short columnIndex = CalculateColumnNumber(column, Auto); if (columnIndex == 0) { return false; } if (ReadCell(CellValue, columnIndex, row)) { return true; } return false; } // Read a cell from spreadsheet using column number. // Default is read the next cell in next row. bool CSpreadSheet::ReadCell (CString &CellValue, short column, long row) { if (column == 0) { m_sLastError = "Column cannot be zero\n"; return false; } int tempRow = m_dCurrentRow; if (row) { m_dCurrentRow = row; } if (ReadRow(m_atempArray, m_dCurrentRow)) { // Get value of cell in desired column if (column <= m_atempArray.GetSize()) { CellValue = m_atempArray.GetAt(column-1); } else { CellValue.Empty(); m_dCurrentRow = tempRow; return false; } m_dCurrentRow = tempRow; return true; } m_dCurrentRow = tempRow; m_sLastError = "Error reading row\n"; return false; } // Begin transaction void CSpreadSheet::BeginTransaction() { m_bTransaction = true; } // Save changes to spreadsheet bool CSpreadSheet::Commit() { if (m_bExcel) // If file is an Excel spreadsheet { m_Database->OpenEx(m_sDsn, CDatabase::noOdbcDialog); if (m_bAppend) { // Delete old sheet if it exists m_stempString= "[" + m_sSheetName + "$A1:IV65536]"; m_stempSql.Format ("DROP TABLE %s", m_stempString); try { m_Database->ExecuteSQL(m_stempSql); } catch(CDBException *e) { m_sLastError = e->m_strError; m_Database->Close(); return false; } // Create new sheet m_stempSql.Format("CREATE TABLE [%s$A1:IV65536] (", m_sSheetName); for (int j = 0; j < m_aFieldNames.GetSize(); j++) { m_stempSql = m_stempSql + "[" + m_aFieldNames.GetAt(j) +"]" + " char(255), "; } m_stempSql.Delete(m_stempSql.GetLength()-2, 2); m_stempSql += ")"; } else { // Create new sheet m_stempSql.Format("CREATE TABLE [%s] (", m_sSheetName); for (int i = 0; i < m_aFieldNames.GetSize(); i++) { m_stempSql = m_stempSql + "[" + m_aFieldNames.GetAt(i) +"]" + " char(255), "; } m_stempSql.Delete(m_stempSql.GetLength()-2, 2); m_stempSql += ")"; } try { m_Database->ExecuteSQL(m_stempSql); if (!m_bAppend) { m_dTotalColumns = m_aFieldNames.GetSize(); m_bAppend = true; } } catch(CDBException *e) { m_sLastError = e->m_strError; m_Database->Close(); return false; } // Save changed data for (int k = 1; k < m_dTotalRows; k++) { ReadRow(m_atempArray, k+1); // Create Insert SQL m_stempSql.Format("INSERT INTO [%s$A1:IV%d] (", m_sSheetName, k); for (int i = 0; i < m_atempArray.GetSize(); i++) { m_stempString.Format("[%s], ", m_aFieldNames.GetAt(i)); m_stempSql = m_stempSql + m_stempString; } m_stempSql.Delete(m_stempSql.GetLength()-2, 2); m_stempSql += ") VALUES ("; for (int j = 0; j < m_atempArray.GetSize(); j++) { m_stempString.Format("'%s', ", m_atempArray.GetAt(j)); m_stempSql = m_stempSql + m_stempString; } m_stempSql.Delete(m_stempSql.GetLength()-2, 2); m_stempSql += ")"; // Add row try { m_Database->ExecuteSQL(m_stempSql); } catch(CDBException *e) { m_sLastError = e->m_strError; m_Database->Close(); return false; } } m_Database->Close(); m_bTransaction = false; return true; } else // if file is a text delimited file { try { CFile *File = NULL; File = new CFile(m_sFile, CFile::modeCreate | CFile::modeWrite | CFile::shareDenyNone); if (File != NULL) { CArchive *Archive = NULL; Archive = new CArchive(File, CArchive::store); if (Archive != NULL) { for (int i = 0; i < m_aRows.GetSize(); i++) { Archive->WriteString(m_aRows.GetAt(i)); Archive->WriteString("\r\n"); } delete Archive; delete File; m_bTransaction = false; return true; } delete File; } } catch(...) { } m_sLastError = "Error writing file\n"; return false; } } // Undo changes to spreadsheet bool CSpreadSheet::RollBack() { if (Open()) { m_bTransaction = false; return true; } m_sLastError = "Error in returning to previous state\n"; return false; } bool CSpreadSheet::Convert(CString SheetOrSeparator) { // Prepare file m_stempString = m_sFile; m_stempString.Delete(m_stempString.GetLength()-4, 4); if (m_bExcel) // If file is an Excel spreadsheet { m_stempString += ".csv"; CSpreadSheet tempSheet(m_stempString, SheetOrSeparator, false); // Stop convert if text delimited file exists if (tempSheet.GetTotalColumns() != 0) { return false; } tempSheet.BeginTransaction(); for (int i = 1; i <= m_dTotalRows; i++) { if (!ReadRow(m_atempArray, i)) { return false; } if (!tempSheet.AddRow(m_atempArray, i)) { return false; } } if (!tempSheet.Commit()) { return false; } return true; } else // if file is a text delimited file { m_stempString += ".xls"; CSpreadSheet tempSheet(m_stempString, SheetOrSeparator, false); // Stop convert if Excel file exists if (tempSheet.GetTotalColumns() != 0) { return false; } GetFieldNames(m_atempArray); // Check for duplicate header row field bool duplicate = false; for (int i = 0; i < m_atempArray.GetSize(); i++) { for (int j = 0; j < m_atempArray.GetSize(); j++) { if ((i != j) && (m_atempArray.GetAt(i) == m_atempArray.GetAt(j))) { m_sLastError.Format("Duplicate header row field:%s\n", m_atempArray.GetAt(i)); duplicate = true; } } } if (duplicate) // Create dummy header row { m_atempArray.RemoveAll(); for (int k = 1; k <= m_dTotalColumns; k++) { m_stempString.Format("%d", k); m_atempArray.Add(m_stempString); } if (!tempSheet.AddHeaders(m_atempArray)) { return false; } for (int l = 1; l <= m_dTotalRows; l++) { if (!ReadRow(m_atempArray, l)) { return false; } if (!tempSheet.AddRow(m_atempArray, l+1)) { return false; } } return true; } else { if (!tempSheet.AddHeaders(m_atempArray)) { return false; } for (int l = 2; l <= m_dTotalRows; l++) { if (!ReadRow(m_atempArray, l)) { return false; } if (!tempSheet.AddRow(m_atempArray, l)) { return false; } } return true; } } } // Open a text delimited file for reading or writing bool CSpreadSheet::Open() { if (m_bExcel) // If file is an Excel spreadsheet { m_Database->OpenEx(m_sDsn, CDatabase::noOdbcDialog); // Open Sheet m_rSheet = new CRecordset( m_Database ); m_sSql.Format("SELECT * FROM [%s$A1:IV65536]", m_sSheetName); try { m_rSheet->Open(CRecordset::forwardOnly, m_sSql, CRecordset::readOnly); } catch(...) { delete m_rSheet; m_rSheet = NULL; m_Database->Close(); return false; } // Get number of columns m_dTotalColumns = m_rSheet->m_nResultCols; if (m_dTotalColumns != 0) { m_aRows.RemoveAll(); m_stempString.Empty(); m_bAppend = true; m_dTotalRows++; // Keep count of total number of rows // Get field names i.e header row for (int i = 0; i < m_dTotalColumns; i++) { m_stempSql = m_rSheet->m_rgODBCFieldInfos[i].m_strName; m_aFieldNames.Add(m_stempSql); // Join up all the columns into a string if (i != m_dTotalColumns-1) // Not last column { m_stempString = m_stempString + "\"" + m_stempSql + "\"" + m_sSeparator; } else // Last column { m_stempString = m_stempString + "\"" + m_stempSql + "\""; } } // Store the header row as the first row in memory m_aRows.Add(m_stempString); // Read and store the rest of the rows in memory while (!m_rSheet->IsEOF()) { m_dTotalRows++; // Keep count of total number of rows try { // Get all the columns in a row m_stempString.Empty(); for (short column = 0; column < m_dTotalColumns; column++) { m_rSheet->GetFieldValue(column, m_stempSql); // Join up all the columns into a string if (column != m_dTotalColumns-1) // Not last column { m_stempString = m_stempString + "\"" + m_stempSql + "\"" + m_sSeparator; } else // Last column { m_stempString = m_stempString + "\"" + m_stempSql + "\""; } } // Store the obtained row in memory m_aRows.Add(m_stempString); m_rSheet->MoveNext(); } catch (...) { m_sLastError = "Error reading row\n"; delete m_rSheet; m_rSheet = NULL; m_Database->Close(); return false; } } } m_rSheet->Close(); delete m_rSheet; m_rSheet = NULL; m_Database->Close(); m_dCurrentRow = 1; return true; } else // if file is a text delimited file { try { CFile *File = NULL; File = new CFile(m_sFile, CFile::modeRead | CFile::shareDenyNone); if (File != NULL) { CArchive *Archive = NULL; Archive = new CArchive(File, CArchive::load); if (Archive != NULL) { m_aRows.RemoveAll(); // Read and store all rows in memory while(Archive->ReadString(m_stempString)) { m_aRows.Add(m_stempString); } ReadRow(m_aFieldNames, 1); // Get field names i.e header row delete Archive; delete File; // Get total number of rows m_dTotalRows = m_aRows.GetSize(); // Get the largest number of columns for (int i = 0; i < m_aRows.GetSize(); i++) { ReadRow(m_atempArray, i); if (m_atempArray.GetSize() > m_dTotalColumns) { m_dTotalColumns = m_atempArray.GetSize(); } } if (m_dTotalColumns != 0) { m_bAppend = true; } return true; } delete File; } } catch(...) { } m_sLastError = "Error in opening file\n"; return false; } } // Convert Excel column in alphabet into column number short CSpreadSheet::CalculateColumnNumber(CString column, bool Auto) { if (Auto) { int firstLetter, secondLetter; column.MakeUpper(); if (column.GetLength() == 1) { firstLetter = column.GetAt(0); return (firstLetter - 65 + 1); // 65 is A in ascii } else if (column.GetLength() == 2) { firstLetter = column.GetAt(0); secondLetter = column.GetAt(1); return ((firstLetter - 65 + 1)*26 + (secondLetter - 65 + 1)); // 65 is A in ascii } } // Check if it is a valid field name for (int i = 0; i < m_aFieldNames.GetSize(); i++) { if (!column.Compare(m_aFieldNames.GetAt(i))) { return (i + 1); } } m_sLastError = "Invalid field name or column alphabet\n"; return 0; } // Get the name of the Excel-ODBC driver void CSpreadSheet::GetExcelDriver() { char szBuf[2001]; WORD cbBufMax = 2000; WORD cbBufOut; char *pszBuf = szBuf; // Get the names of the installed drivers ("odbcinst.h" has to be included ) if(!SQLGetInstalledDrivers(szBuf,cbBufMax,& cbBufOut)) { m_sExcelDriver = ""; } // Search for the driver... do { if( strstr( pszBuf, "Excel" ) != 0 ) { // Found ! m_sExcelDriver = CString( pszBuf ); break; } pszBuf = strchr( pszBuf, '\0' ) + 1; } while( pszBuf[1] != '\0' ); } #endif
运行中可能出现如下两个错误:
1.字符集设置
error C2664: “void ATL::CStringT<BaseType,StringTraits>::Format(const wchar_t *,...)”: 不能将参数 1 从“const char [75]”转换为“const wchar_t *”
2 MFC的使用
error LNK2019: 无法解析的外部符号 __imp___vsnprintf，该符号在函数 _StringVPrintfWorkerA@20 中被引用
如图为正确的:
示例:
void CMy123Dlg::OnBnClickedOk() { // TODO: 在此添加控件通知处理程序代码 CString strFile = "D:\\demo2.xls"; CSpreadSheet ss(strFile,"LABLE", FALSE); CStringArray tempStrArray; ss.GetFieldNames(tempStrArray); tempStrArray.RemoveAll(); tempStrArray.Add("Item"); tempStrArray.Add("Mac Number"); tempStrArray.Add("RFPI Number"); tempStrArray.Add("Serial Number"); tempStrArray.Add("PCBA Serial Number"); ss.AddHeaders(tempStrArray); tempStrArray.RemoveAll(); tempStrArray.Add("1"); tempStrArray.Add("2"); tempStrArray.Add("3"); tempStrArray.Add("4"); tempStrArray.Add("5"); ss.AddRow(tempStrArray); ss.AddRow(tempStrArray); ss.Commit(); tempStrArray.RemoveAll(); int nCul = ss.GetTotalColumns(); int nRow = ss.GetTotalRows(); CStringArray RowValues; CString strValue1, strValue2; ss.ReadRow(RowValues, 0); CDialogEx::OnOK(); }
一、 包含Excel文件操作类头文件 #include "CSpreadSheet.h" 二、 新建Excel文件，并写入默认数据 // 新建Excel文件名及路径，TestSheet为内部表名 CSpreadSheet SS("c:\\Test.xls", "TestSheet"); CStringArray sampleArray, testRow; SS.BeginTransaction(); // 加入标题 sampleArray.RemoveAll(); sampleArray.Add("姓名"); sampleArray.Add("年龄"); SS.AddHeaders(sampleArray); // 加入数据 CString strName[] = {"徐景周","徐志慧","郭徽","牛英俊","朱小鹏"}; CString strAge[] = {"27","23","28","27","26"}; for(int i = 0; i < sizeof(strName)/sizeof(CString); i++) { sampleArray.RemoveAll(); sampleArray.Add(strName[i]); sampleArray.Add(strAge[i]); SS.AddRow(sampleArray); } SS.Commit(); 三、 读取Excel文件数据 CSpreadSheet SS("c:\\Test.xls", "TestSheet"); CStringArray Rows, Column; //清空列表框 m_AccessList.ResetContent(); for (int i = 1; i <= SS.GetTotalRows(); i++) { // 读取一行 SS.ReadRow(Rows, i); CString strContents = ""; for (int j = 1; j <= Rows.GetSize(); j++) { if(j == 1) strContents = Rows.GetAt(j-1); else strContents = strContents + " --> " + Rows.GetAt(j-1); } m_AccessList.AddString(strContents); } 四、 对已存在Excel表格数据进行添加、插入、替换操作 // 初始化测试行数据，进行添加、插入及替换数据操作演示 for (int k = 1; k <= 2; k++) { testRow.Add("Test"); } SS.AddRow(testRow); // 添加到尾部 SS.AddRow(testRow, 2); // 插入新行到第二行 SS.AddRow(testRow, 6, true); // 替换原第四行来新的内容 SS.AddCell("徐景周", 1,2); // 添加(不存在)或替换(存在)第二行，第一列单元格内容 SS.Commit(); 五、 对已存在Excel表格数据进行行、列、单元格查询 void CExcelAccessDlg::OnQuery() { CSpreadSheet SS("c:\\Test.xls", "TestSheet"); CStringArray Rows, Column; CString tempString = ""; UpdateData(); if(m_strRow == "" && m_strColumn == "") // 查询为空 { AfxMessageBox("行号、列号不能同时为空!"); return; } else if(m_strRow == "" && m_strColumn != "") // 查询指定列数据 { int iColumn = atoi(m_strColumn); int iCols = SS.GetTotalColumns(); if(iColumn > iCols) // 超出表范围查询时 { CString str; str.Format("表中总列数为: %d, ", iCols); AfxMessageBox(str + " 查询列数大于Excel表中总列数，请重新输入!"); return; } // 读取一列数据，并按行读出 if(!SS.ReadColumn(Column, iColumn)) { AfxMessageBox(SS.GetLastError()); return; } CString tmpStr; for (int i = 0; i < Column.GetSize(); i++) { tmpStr.Format("行号: %d, 列号: %d ,内容: %s\n", i+1,iColumn,Column.GetAt(i)); tempString += tmpStr; } AfxMessageBox(tempString); } else if(m_strRow != "" && m_strColumn == "") // 查询指定行数数据 { int iRow = atoi(m_strRow); int iRows = SS.GetTotalRows(); if(iRow > iRows) // 超出表范围查询时 { CString str; str.Format("表中总行数为: %d, ", iRows); AfxMessageBox(str + " 查询行数大于Excel表中总行数，请重新输入!"); return; } // 读取指定行数据 if(!SS.ReadRow(Rows, iRow)) { AfxMessageBox(SS.GetLastError()); return; } CString tmpStr; for (int i = 0; i < Rows.GetSize(); i++) { tmpStr.Format("行号: %d, 列号: %d ,内容: %s\n", iRow, i+1, Rows.GetAt(i)); tempString += tmpStr; } AfxMessageBox(tempString); } else if(m_strRow != "" && m_strColumn != "") // 查询指定单元格数据 { int iRow = atoi(m_strRow), iColumn = atoi(m_strColumn); int iRows = SS.GetTotalRows(), iCols = SS.GetTotalColumns(); if(iColumn > iCols) // 超出表范围查询时 { CString str; str.Format("表中总列数为: %d, ", iCols); AfxMessageBox(str + " 查询列数大于Excel表中总列数，请重新输入!"); return; } else if(iRow > iRows) { CString str; str.Format("表中总行数为: %d, ", iRows); AfxMessageBox(str + " 查询行数大于Excel表中总行数，请重新输入!"); return; } // 读取指定行、列单元格数据 if(!SS.ReadCell(tempString, iColumn, iRow)) { AfxMessageBox(SS.GetLastError()); return; } CString str; str.Format("行号: %d, 列号: %d ,内容: %s", iRow,iColumn,tempString); AfxMessageBox(str); } } 六、 将存在的Excel转换另存为指定分隔的文本文件 // 将原Excel文件转换为用分号分隔的文本，并另存为同名文本文件 SS.Convert(";"); 七、 删除Excel中表格 SS. DeleteSheet(); // 删除Excel文件中所有表格 SS. DeleteSheet(" TestSheet "); // 删除Excel中TextSheet表格 八、 获取Excel中总行数、总列数、当前行 int iCols = SS.GetTotalColumns(); // 总列数 int iRows = SS.GetTotalRows(); // 总行数 int iCurRow = SS.GetCurrentRow(); // 当前所在行号 九、 获取行头数据 CStringArray rowHeader; SS.GetFieldNames(rowHeader); CString tmpStr; for (int i = 0; i < rowHeader.GetSize(); i++) { tmpStr.Format("行号: %d, 列号: %d ,内容: %s\n", 1, i+1, rowHeader.GetAt(i)); tempString += tmpStr; } AfxMessageBox(tempString);
另一种方法(待整理):
http://pan.baidu.com/s/1hqfBn72