FPSpreadsheet/de

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The fpSpreadsheet library offers a convenient way to generate and read spreadsheet documents in various formats. The library is written in a very flexible manner, capable of being extended to support any number of formats easily.

API Dokumentation

API Referenz

Eine Referenz im CHM-Format befindet sich hier:

http://lazarus-ccr.svn.sourceforge.net/viewvc/lazarus-ccr/components/fpspreadsheet/fpspreadsheet.chm

Formeln

Zwei Arten von Formeln werden von FPSpreadsheet unterstützt: String-Formeln und RPN-Formeln. String formulas are written in strings just like in the office application, zum Beispiel "ROUND(A1+B1)", während RPN-Formeln in Umgekehrter Polnischer Notation (Reverse Polish Notation) geschrieben werden, zum Beispiel: A1, B1, Add, 0, ROUND

RPN-Formeln

Ein Beispiel für die Verwendung eingebauter Routinen:

<delphi>

 // Schreibt die Formel E1 = ABS(A1)
 SetLength(MyRPNFormula, 2);
 MyRPNFormula[0].ElementKind := fekCell;
 MyRPNFormula[0].Col := 0;
 MyRPNFormula[0].Row := 0;
 MyRPNFormula[1].ElementKind := fekABS;
 MyWorksheet.WriteRPNFormula(0, 4, MyRPNFormula);
 // Schreibt die Formel F1 = ROUND(A1, 0)
 SetLength(MyRPNFormula, 3);
 MyRPNFormula[0].ElementKind := fekCell;
 MyRPNFormula[0].Col := 0;
 MyRPNFormula[0].Row := 0;
 MyRPNFormula[1].ElementKind := fekNum;
 MyRPNFormula[1].DoubleValue := 0.0;
 MyRPNFormula[2].ElementKind := fekROUND;
 MyWorksheet.WriteRPNFormula(0, 5, MyRPNFormula);

</delphi>

Eingebaute Routinen

ABS - Returns the absolute value of a given number. Takes 1 argument. Example: ABS(-1) = 1

ROUND - Rounds a number to a given number of decimal places. Takes 2 arguments, first the number to be rounded and then the number of decimal places to be rounded to. This second argument is zero by default and may be negative.

Packages

FPSpreadsheet comes with the following packages to facilitate it's usage with:

laz_fpspreadsheet.lpk

Adds all necessary files to use fpspreadsheet in your Lazarus projects. After adding this package as a requirement to your project you can add "fpspreadsheet" to the uses clause of the units which use it.

laz_fpspreadsheet_visual.lpk

Adds a set of visual components which expands the capabilities of FPSpreadsheet to also include editing and displaying data on screen inside LCL applications.

Die folgenden LCL Komponenten werden mit diesem Package installiert:

Beispiele

To create a project which uses the fpspreadsheet library, add the fpspreadsheet_pkg package to it's Lazarus project, or add the base directory of fpspreadsheet to you compiler options if using another IDE.

Excel 5 Beispiel

<delphi> { excel5demo.dpr

Demonstrates how to write an Excel 5.x file using the fpspreadsheet library

You can change the output format by changing the OUTPUT_FORMAT constant

AUTHORS: Felipe Monteiro de Carvalho } program excel5demo;

{$mode delphi}{$H+}

uses

 Classes, SysUtils, fpspreadsheet, fpsallformats, fpspreadsheet_pkg;

const OUTPUT_FORMAT = sfExcel5;

var

 MyWorkbook: TsWorkbook;
 MyWorksheet: TsWorksheet;
 MyFormula: TsRPNFormula;
 MyDir: string;

begin

 // Initialization
 MyDir := ExtractFilePath(ParamStr(0));
 // Create the spreadsheet
 MyWorkbook := TsWorkbook.Create;
 MyWorksheet := MyWorkbook.AddWorksheet('My Worksheet');
 // Write some number cells
 MyWorksheet.WriteNumber(0, 0, 1.0);
 MyWorksheet.WriteNumber(0, 1, 2.0);
 MyWorksheet.WriteNumber(0, 2, 3.0);
 MyWorksheet.WriteNumber(0, 3, 4.0);
 // Write the formula E1 = A1 + B1
 // or, in RPN: A1, B1, +
 SetLength(MyFormula, 3);
 MyFormula[0].ElementKind:=fekCell; {A1}
 MyFormula[0].Col := 0;
 MyFormula[0].Row := 0;
 MyFormula[1].ElementKind:=fekCell; {B1}
 MyFormula[1].Col := 1;
 MyFormula[1].Row := 0;
 MyFormula[2].ElementKind:=fekAdd;;  {+}
 MyWorksheet.WriteRPNFormula(0, 4, MyFormula);
 // Creates a new worksheet
 MyWorksheet := MyWorkbook.AddWorksheet('My Worksheet 2');
 // Write some string cells
 MyWorksheet.WriteUTF8Text(0, 0, 'Erster');
 MyWorksheet.WriteUTF8Text(0, 1, 'Zweiter');
 MyWorksheet.WriteUTF8Text(0, 2, 'Dritter');
 MyWorksheet.WriteUTF8Text(0, 3, 'Vierter');
 // Save the spreadsheet to a file
 MyWorkbook.WriteToFile(MyDir + 'test' + STR_EXCEL_EXTENSION, OUTPUT_FORMAT);
 MyWorkbook.Free;

end. </delphi>


Iteration durch alle Arbeitsblätter

<delphi> var

 MyWorkbook: TsWorkbook;
 MyWorksheet: TsWorksheet;
 i: Integer;

begin

 // Hier wird MyWorkbook aus einer Datei geladen oder neu erzeugt

 for i := 0 to MyWorkbook.GetWorksheetCount() - 1 do
 begin
   MyWorksheet := MyWorkbook.GetWorksheetByIndex(i);
   // Tue etwas mit MyWorksheet
 end;

</delphi>

Converting a database to a spreadsheet

Note that this is only meta-code, not tested.

<delphi> program db5xls;

{$mode delphi}{$H+}

uses

 Classes, SysUtils, 
 // add database units
 fpspreadsheet, fpsallformats, fpspreadsheet_pkg;

const OUTPUT_FORMAT = sfExcel5;

var

 MyWorkbook: TsWorkbook;
 MyWorksheet: TsWorksheet;
 MyDatabase: TSdfDataset;
 MyDir: string;
 i, j: Integer;

begin

 // Initialization
 MyDir := ExtractFilePath(ParamStr(0));

 // Open the database
 MyDatabase := TSdfDataset.Create;
 MyDatabase.Filename := 'test.dat';
 // Add table description here
 MyDatabase.Active := True;
 // Create the spreadsheet
 MyWorkbook := TsWorkbook.Create;
 MyWorksheet := MyWorkbook.AddWorksheet('My Worksheet');

 // Write the field names
 for i := 0 to MyDatabase.Fields.Count - 1 do
   MyWorksheet.WriteUTF8Text(0, i, MyDatabase.Field[i].FieldName);
 // Write all cells to the worksheet
 MyDatabase.First;
 j := 0;
 while not MyDatabase.EOF do
 begin
   for i := 0 to MyDatabase.Fields.Count - 1 do
     MyWorksheet.WriteUTF8Text(j + 1, i, MyDatabase.Field[i].AsString);
   MyDatabase.Next;
   Inc(j);
 end;
 // Close the database
 MyDatabase.Active := False;
 MyDatabase.Free;
 // Save the spreadsheet to a file
 MyWorkbook.WriteToFile(MyDir + 'test' + STR_EXCEL_EXTENSION, OUTPUT_FORMAT);
 MyWorkbook.Free;

end. </delphi>

Converting between two spreadsheet formats

Note that this is only meta-code, not tested.

<delphi> program ods2xls;

{$mode delphi}{$H+}

uses

 Classes, SysUtils, 
 fpspreadsheet, fpsallformats, fpspreadsheet_pkg;

const

 INPUT_FORMAT = sfOpenDocument;
 OUTPUT_FORMAT = sfExcel8;

var

 MyWorkbook: TsWorkbook;
 MyDir: string;

begin

 // Initialization
 MyDir := ExtractFilePath(ParamStr(0));

 // Convert the spreadsheet
 MyWorkbook := TsWorkbook.Create;
 try
   MyWorkbook.ReadFromFile(MyDir + 'test.ods', INPUT_FORMAT);
   MyWorkbook.WriteToFile(MyDir + 'test.xls', OUTPUT_FORMAT);
 finally
   MyWorkbook.Free;
 end;

end. </delphi>

Verwendung von Formatierungsoptionen

Die Formatierung wird unabhängig vom Text gesetzt wie im folgenden Beispiel:

<delphi>

 // Erzeugt einen fett geschriebenen Text
 MyWorksheet.WriteUTF8Text(0, 0, 'First');
 MyWorksheet.WriteUsedFormatting(0, 0, [uffBold]);

</delphi>

Download

Subversion

Sie können FPSpreadsheet mit dem folgenden Befehl herunterladen unter Verwendung von Subversion:

svn co https://lazarus-ccr.svn.sourceforge.net/svnroot/lazarus-ccr/components/fpspreadsheet fpspreadsheet

Aktueller Fortschritt

Progress by supported format:

Format Supports multiple sheets? Unterstützt Unicode? Reader Progress Writer Progress Text Number String Formel RPN Formel
Excel 2.x Nein Nein** Working Working Working Working Nicht implementiert Working
Excel 3.0 Nein Nein** Nicht implementiert Nicht implementiert Nicht implementiert Nicht implementiert Nicht implementiert Nicht implementiert
Excel 4.0 Nein Nein** Nicht implementiert Nicht implementiert Nicht implementiert Nicht implementiert Nicht implementiert Nicht implementiert
Excel 5.0 (Excel 5.0 und 95) Ja Nein** Working* Working Working Working Nicht implementiert Working
Excel 8.0 (Excel 97, 2000, XP und 2003) Ja Ja Working* Working Working Working Nicht implementiert Nicht implementiert
Microsoft OOXML Ja Ja Nicht implementiert Nicht implementiert Nicht implementiert Nicht implementiert Nicht implementiert Nicht implementiert
OpenDocument Ja Ja Working Working Working Working Nicht implementiert Nicht implementiert

(*) Some cell could be returned blank due missing or non ready implemented number and text formats.
(**) In formats which don't support Unicode the data is stored by default as ISO 8859-1 (Latin 1). You can change the encoding in TsWorkbook.Encoding. Note that FPSpreadsheet offers UTF-8 read and write routines, but the data might be converted to ISO when reading or writing to the disk. Be careful that characters which don't fit selected encoding will be lost in those operations. The remarks here are only valid for formats which don't support Unicode.

Progress of the formatting options

Some formatting options were added, but they aren't yet implemented for all formats:

Format Textrotation Fett
Excel 2.x Nicht implementiert Nicht implementiert
Excel 3.0 Nicht implementiert Nicht implementiert
Excel 4.0 Nicht implementiert Nicht implementiert
Excel 5.0 (Excel 5.0 und 95) - -
Excel 8.0 (Excel 97, 2000, XP und 2003) Working Working
Microsoft OOXML Nicht implementiert Nicht implementiert
OpenDocument Working Working

Changelog

Jan 2009

  • Implemented a cross-platform support for OLE file. Now Excel 5.0 files can be created in any operating system.
  • Adds read support for Excel 2.1

Feb 2008

  • Initial commit to lazarus-ccr with write support for Excel 2.1, Excel 5.0 (Windows only) and experimental OOXML and OpenDocument

Lizenz

LGPL with static linking exception. Dies ist die selbe Lizenz wie sie von der Lazarus Component Library verwendet wird.

Siehe auch

Externe Links