CSpreadSheet.h
资源名称:Excel.rar [点击查看]
上传用户:aymxxn
上传日期:2014-11-29
资源大小:135k
文件大小:33k
源码类别:
文件操作
开发平台:
Visual C++
- // 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:%sn", FieldNames.GetAt(i));
- return false;
- }
- }
- }
- }
- m_atempArray.Append(FieldNames);
- if (!AddRow(m_atempArray, 1, true))
- {
- m_sLastError = "Problems with adding headersn";
- 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 sheetn";
- 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:%sn", 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 firstn";
- 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 fieldsn";
- 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 zeron";
- 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 fieldsn";
- 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:%sn", 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 filen";
- 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 spreadsheetn";
- 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 zeron";
- 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 rown";
- 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 zeron";
- 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 rown";
- 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("rn");
- }
- delete Archive;
- delete File;
- m_bTransaction = false;
- return true;
- }
- delete File;
- }
- }
- catch(...)
- {
- }
- m_sLastError = "Error writing filen";
- return false;
- }
- }
- // Undo changes to spreadsheet
- bool CSpreadSheet::RollBack()
- {
- if (Open())
- {
- m_bTransaction = false;
- return true;
- }
- m_sLastError = "Error in returning to previous staten";
- 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:%sn", 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 rown";
- 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 filen";
- 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 alphabetn";
- 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, ' ' ) + 1;
- }
- while( pszBuf[1] != ' ' );
- }
- #endif