下面的例子是不利用OLE控制Excel把StringGrid导出导XLS文件中。
{2. Without OLE }
procedure XlsWriteCellLabel(XlsStream: TStream; const ACol, ARow: Word;
const AValue: string);
var
L: Word;
const
{$J+}
CXlsLabel: array[0..5] of Word = ($204, 0, 0, 0, 0, 0);
{$J-}
begin
L := Length(AValue);
CXlsLabel[1] := 8 + L;
CXlsLabel[2] := ARow;
CXlsLabel[3] := ACol;
CXlsLabel[5] := L;
XlsStream.WriteBuffer(CXlsLabel, SizeOf(CXlsLabel));
XlsStream.WriteBuffer(Pointer(AValue)^, L);
end;
function SaveAsExcelFile(AGrid: TStringGrid; AFileName: string): Boolean;
const
{$J+} CXlsBof: array[0..5] of Word = ($809, 8, 00, $10, 0, 0); {$J-}
CXlsEof: array[0..1] of Word = ($0A, 00);
var
FStream: TFileStream;
I, J: Integer;
begin
Result := False;
FStream := TFileStream.Create(PChar(AFileName), fmCreate or fmOpenWrite);
try
CXlsBof[4] := 0;
FStream.WriteBuffer(CXlsBof, SizeOf(CXlsBof));
for i := 0 to AGrid.ColCount - 1 do
for j := 0 to AGrid.RowCount - 1 do
XlsWriteCellLabel(FStream, I, J, AGrid.cells[i, j]);
FStream.WriteBuffer(CXlsEof, SizeOf(CXlsEof));
Result := True;
finally
FStream.Free;
end;
end;
// Example:
procedure TForm1.Button2Click(Sender: TObject);
begin
if SaveAsExcelFile(StringGrid1, 'c:\MyExcelFile.xls') then
ShowMessage('StringGrid saved!');
end;
**********************************************************
const
CXlsBof: array[0..5] of Word = ($809, 8, 00, $10, 0, 0);
CXlsEof: array[0..1] of Word = ($0A, 00);
CXlsLabel: array[0..5] of Word = ($204, 0, 0, 0, 0, 0);
CXlsNumber: array[0..4] of Word = ($203, 14, 0, 0, 0);
CXlsRk: array[0..4] of Word = ($27E, 10, 0, 0, 0);
procedure XlsBeginStream(XlsStream: TStream; const BuildNumber: Word);
begin
CXlsBof[4] := BuildNumber;
XlsStream.WriteBuffer(CXlsBof, SizeOf(CXlsBof));
end;
procedure XlsEndStream(XlsStream: TStream);
begin
XlsStream.WriteBuffer(CXlsEof, SizeOf(CXlsEof));
end;
procedure XlsWriteCellRk(XlsStream: TStream; const ACol, ARow: Word;
const AValue: Integer);
var
V: Integer;
begin
CXlsRk[2] := ARow;
CXlsRk[3] := ACol;
XlsStream.WriteBuffer(CXlsRk, SizeOf(CXlsRk));
V := (AValue shl 2) or 2;
XlsStream.WriteBuffer(V, 4);
end;
procedure XlsWriteCellNumber(XlsStream: TStream; const ACol, ARow: Word;
const AValue: Double);
begin
CXlsNumber[2] := ARow;
CXlsNumber[3] := ACol;
XlsStream.WriteBuffer(CXlsNumber, SizeOf(CXlsNumber));
XlsStream.WriteBuffer(AValue, 8);
end;
procedure XlsWriteCellLabel(XlsStream: TStream; const ACol, ARow: Word;
const AValue: string);
var
L: Word;
begin
L := Length(AValue);
CXlsLabel[1] := 8 + L;
CXlsLabel[2] := ARow;
CXlsLabel[3] := ACol;
CXlsLabel[5] := L;
XlsStream.WriteBuffer(CXlsLabel, SizeOf(CXlsLabel));
XlsStream.WriteBuffer(Pointer(AValue)^, L);
end;
procedure TForm1.Button1Click(Sender: TObject);
var
FStream: TFileStream;
I, J: Integer;
begin
FStream := TFileStream.Create('c:\e.xls', fmCreate);
try
XlsBeginStream(FStream, 0);
for I := 0 to 99 do
for J := 0 to 99 do
begin
XlsWriteCellNumber(FStream, I, J, 34.34);
// XlsWriteCellRk(FStream, I, J, 3434);
// XlsWriteCellLabel(FStream, I, J, Format('Cell: %d,%d', [I, J]));
end;
XlsEndStream(FStream);
finally
FStream.Free;
end;
end;
---------------------------------------
{ 背景：今天要把DataSet导入Excel，查询以前的贴子，一部分用Ole，速度太慢，
一部分用ADO连接到Excel文件，也很慢，一气之下把DBGrigEh的导出部分改了出来，
欢迎大家指教、改进。
功能：将数据集的数据导入Excel;
用法：With TDS2Excel.Create(TDataSet(ADOQuery1)) do
Try
Save2File(SaveDialog1.FileName, True);
finally
Free;
end;
作者：Caidao (核心代码来自Ehlib)
时间：2003-04-09
地点：汕头
}
unit UntObject;
interface
Uses
DB, Classes;
var
CXlsBof: array[0..5] of Word = ($809, 8, 0, $10, 0, 0);
CXlsEof: array[0..1] of Word = ($0A, 00);
CXlsLabel: array[0..5] of Word = ($204, 0, 0, 0, 0, 0);
CXlsNumber: array[0..4] of Word = ($203, 14, 0, 0, 0);
CXlsRk: array[0..4] of Word = ($27E, 10, 0, 0, 0);
CXlsBlank: array[0..4] of Word = ($201, 6, 0, 0, $17);
Type
TDS2Excel = Class(TObject)
Private
FCol: word;
FRow: word;
FDataSet: TDataSet;
Stream: TStream;
FWillWriteHead: boolean;
FBookMark: TBookmark;
procedure IncColRow;
procedure WriteBlankCell;
procedure WriteFloatCell(const AValue: Double);
procedure WriteIntegerCell(const AValue: Integer);
procedure WriteStringCell(const AValue: string);
procedure WritePrefix;
procedure WriteSuffix;
procedure WriteTitle;
procedure WriteDataCell;
procedure Save2Stream(aStream: TStream);
Public
procedure Save2File(FileName: string; WillWriteHead: Boolean);
Constructor Create(aDataSet: TDataSet);
end;
implementation
uses SysUtils;
Constructor TDS2Excel.Create(aDataSet: TDataSet);
begin
inherited Create;
FDataSet := aDataSet;
end;
procedure TDS2Excel.IncColRow;
begin
if FCol = FDataSet.FieldCount - 1 then
begin
Inc(FRow);
FCol :=0;
end
else
Inc(FCol);
end;
procedure TDS2Excel.WriteBlankCell;
begin
CXlsBlank[2] := FRow;
CXlsBlank[3] := FCol;
Stream.WriteBuffer(CXlsBlank, SizeOf(CXlsBlank));
IncColRow;
end;
procedure TDS2Excel.WriteFloatCell(const AValue: Double);
begin
CXlsNumber[2] := FRow;
CXlsNumber[3] := FCol;
Stream.WriteBuffer(CXlsNumber, SizeOf(CXlsNumber));
Stream.WriteBuffer(AValue, 8);
IncColRow;
end;
procedure TDS2Excel.WriteIntegerCell(const AValue: Integer);
var
V: Integer;
begin
CXlsRk[2] := FRow;
CXlsRk[3] := FCol;
Stream.WriteBuffer(CXlsRk, SizeOf(CXlsRk));
V := (AValue shl 2) or 2;
Stream.WriteBuffer(V, 4);
IncColRow;
end;
procedure TDS2Excel.WriteStringCell(const AValue: string);
var
L: Word;
begin
L := Length(AValue);
CXlsLabel[1] := 8 + L;
CXlsLabel[2] := FRow;
CXlsLabel[3] := FCol;
CXlsLabel[5] := L;
Stream.WriteBuffer(CXlsLabel, SizeOf(CXlsLabel));
Stream.WriteBuffer(Pointer(AValue)^, L);
IncColRow;
end;
procedure TDS2Excel.WritePrefix;
begin
Stream.WriteBuffer(CXlsBof, SizeOf(CXlsBof));
end;
procedure TDS2Excel.WriteSuffix;
begin
Stream.WriteBuffer(CXlsEof, SizeOf(CXlsEof));
end;
procedure TDS2Excel.WriteTitle;
var
n: word;
begin
for n := 0 to FDataSet.FieldCount - 1 do
WriteStringCell(FDataSet.Fields[n].FieldName);
end;
procedure TDS2Excel.WriteDataCell;
var
n: word;
begin
WritePrefix;
if FWillWriteHead then WriteTitle;
FDataSet.DisableControls;
FBookMark := FDataSet.GetBookmark;
FDataSet.First;
while not FDataSet.Eof do
begin
for n := 0 to FDataSet.FieldCount - 1 do
begin
if FDataSet.Fields[n].IsNull then
WriteBlankCell
else begin
case FDataSet.Fields[n].DataType of
ftSmallint, ftInteger, ftWord, ftAutoInc, ftBytes:
WriteIntegerCell(FDataSet.Fields[n].AsInteger);
ftFloat, ftCurrency, ftBCD:
WriteFloatCell(FDataSet.Fields[n].AsFloat);
else
WriteStringCell(FDataSet.Fields[n].AsString);
end;
end;
end;
FDataSet.Next;
end;
WriteSuffix;
if FDataSet.BookmarkValid(FBookMark) then FDataSet.GotoBookmark(FBookMark);
FDataSet.EnableControls;
end;
procedure TDS2Excel.Save2Stream(aStream: TStream);
begin
FCol := 0;
FRow := 0;
Stream := aStream;
WriteDataCell;
end;
procedure TDS2Excel.Save2File(FileName: string; WillWriteHead: Boolean);
var
aFileStream: TFileStream;
begin
FWillWriteHead := WillWriteHead;
if FileExists(FileName) then DeleteFile(FileName);
aFileStream := TFileStream.Create(FileName, fmCreate);
Try
Save2Stream(aFileStream);
Finally
aFileStream.Free;
end;
end;
end.