Delphi Excel 操作大全

Delphi Excel 操作大全

(一) 使用动态创建的方法
首先创建 Excel 对象，使用ComObj:
var ExcelApp: Variant;
ExcelApp := CreateOleObject( 'Excel.Application' );
1) 显示当前窗口：
ExcelApp.Visible := True;
2) 更改 Excel 标题栏：
ExcelApp.Caption := '应用程序调用 Microsoft Excel';
3) 添加新工作簿：
ExcelApp.WorkBooks.Add;
4) 打开已存在的工作簿：
ExcelApp.WorkBooks.Open( 'C:/Excel/Demo.xls' );
5) 设置第2个工作表为活动工作表：
ExcelApp.WorkSheets[2].Activate;  或 ExcelApp.WorksSheets[ 'Sheet2' ].Activate;
6) 给单元格赋值：
ExcelApp.Cells[1,4].Value := '第一行第四列';
7) 设置指定列的宽度（单位：字符个数），以第一列为例：
ExcelApp.ActiveSheet.Columns[1].ColumnsWidth := 5;
8) 设置指定行的高度（单位：磅）（1磅＝0.035厘米），以第二行为例：
ExcelApp.ActiveSheet.Rows[2].RowHeight := 1/0.035; // 1厘米
9) 在第8行之前插入分页符：
ExcelApp.WorkSheets[1].Rows.PageBreak := 1;
10) 在第8列之前删除分页符：ExcelApp.ActiveSheet.Columns[4].PageBreak := 0;
11) 指定边框线宽度：
ExcelApp.ActiveSheet.Range[ 'B3:D4' ].Borders[2].Weight := 3;
1-左    2-右   3-顶    4-底   5-斜( / )     6-斜( / )
12) 清除第一行第四列单元格公式：
ExcelApp.ActiveSheet.Cells[1,4].ClearContents;
13) 设置第一行字体属性：ExcelApp.ActiveSheet.Rows[1].Font.Name := '隶书';
ExcelApp.ActiveSheet.Rows[1].Font.Color  := clBlue;
ExcelApp.ActiveSheet.Rows[1].Font.Bold   := True;
ExcelApp.ActiveSheet.Rows[1].Font.UnderLine := True;
14) 进行页面设置：
a.页眉：
   ExcelApp.ActiveSheet.PageSetup.CenterHeader := '报表演示';
b.页脚：
   ExcelApp.ActiveSheet.PageSetup.CenterFooter := '第&P页';
c.页眉到顶端边距2cm：
   ExcelApp.ActiveSheet.PageSetup.HeaderMargin := 2/0.035;
d.页脚到底端边距3cm：
   ExcelApp.ActiveSheet.PageSetup.HeaderMargin := 3/0.035;
e.顶边距2cm：
   ExcelApp.ActiveSheet.PageSetup.TopMargin := 2/0.035;
f.底边距2cm：
   ExcelApp.ActiveSheet.PageSetup.BottomMargin := 2/0.035;
g.左边距2cm：
   ExcelApp.ActiveSheet.PageSetup.LeftMargin := 2/0.035;
h.右边距2cm：
   ExcelApp.ActiveSheet.PageSetup.RightMargin := 2/0.035;
i.页面水平居中：
   ExcelApp.ActiveSheet.PageSetup.CenterHorizontally := 2/0.035;
j.页面垂直居中：
   ExcelApp.ActiveSheet.PageSetup.CenterVertically := 2/0.035;
k.打印单元格网线：
   ExcelApp.ActiveSheet.PageSetup.PrintGridLines := True;
15) 拷贝操作：
a.拷贝整个工作表：   ExcelApp.ActiveSheet.Used.Range.Copy;
b.拷贝指定区域：   ExcelApp.ActiveSheet.Range[ 'A1:E2' ].Copy;
c.从A1位置开始粘贴：   ExcelApp.ActiveSheet.Range.[ 'A1' ].PasteSpecial;
d.从文件尾部开始粘贴：   ExcelApp.ActiveSheet.Range.PasteSpecial;
16) 插入一行或一列：
a. ExcelApp.ActiveSheet.Rows[2].Insert;
b. ExcelApp.ActiveSheet.Columns[1].Insert;
17) 删除一行或一列：
a. ExcelApp.ActiveSheet.Rows[2].Delete;
b. ExcelApp.ActiveSheet.Columns[1].Delete;
18) 打印预览工作表：
ExcelApp.ActiveSheet.PrintPreview;
19) 打印输出工作表：
ExcelApp.ActiveSheet.PrintOut;
20) 工作表保存：
if not ExcelApp.ActiveWorkBook.Saved then
  ExcelApp.ActiveSheet.PrintPreview;
21) 工作表另存为：
ExcelApp.SaveAs( 'C:/Excel/Demo1.xls' );
22) 放弃存盘：
ExcelApp.ActiveWorkBook.Saved := True;
23) 关闭工作簿：
ExcelApp.WorkBooks.Close;
24) 退出 Excel：
ExcelApp.Quit;
(二) 使用Delphi 控件方法
在Form中分别放入ExcelApplication, ExcelWorkbook和ExcelWorksheet。 
1）  打开Excel 
ExcelApplication1.Connect;
2) 显示当前窗口：
ExcelApplication1.Visible[0]:=True;
3) 更改 Excel 标题栏：
ExcelApplication1.Caption := '应用程序调用 Microsoft Excel';
4) 添加新工作簿：
ExcelWorkbook1.ConnectTo(ExcelApplication1.Workbooks.Add(EmptyParam,0));
5) 添加新工作表：
var Temp_Worksheet: _WorkSheet;
begin
Temp_Worksheet:=ExcelWorkbook1.
WorkSheets.Add(EmptyParam,EmptyParam,EmptyParam,EmptyParam,0) as _WorkSheet;
ExcelWorkSheet1.ConnectTo(Temp_WorkSheet);End;
6) 打开已存在的工作簿：
ExcelApplication1.Workbooks.Open (c:/a.xls
EmptyParam,EmptyParam,EmptyParam,EmptyParam,
EmptyParam,EmptyParam,EmptyParam,EmptyParam,
   EmptyParam,EmptyParam,EmptyParam,EmptyParam,0)
7) 设置第2个工作表为活动工作表：
ExcelApplication1.WorkSheets[2].Activate;  或
ExcelApplication1.WorksSheets[ 'Sheet2' ].Activate;
8) 给单元格赋值：
ExcelApplication1.Cells[1,4].Value := '第一行第四列';
9) 设置指定列的宽度（单位：字符个数），以第一列为例：
ExcelApplication1.ActiveSheet.Columns[1].ColumnsWidth := 5;
10) 设置指定行的高度（单位：磅）（1磅＝0.035厘米），以第二行为例：
ExcelApplication1.ActiveSheet.Rows[2].RowHeight := 1/0.035; // 1厘米
11) 在第8行之前插入分页符：
ExcelApplication1.WorkSheets[1].Rows.PageBreak := 1;
12) 在第8列之前删除分页符：
ExcelApplication1.ActiveSheet.Columns[4].PageBreak := 0;
13) 指定边框线宽度：
ExcelApplication1.ActiveSheet.Range[ 'B3:D4' ].Borders[2].Weight := 3;
1-左    2-右   3-顶    4-底   5-斜( / )     6-斜( / )
14) 清除第一行第四列单元格公式：
ExcelApplication1.ActiveSheet.Cells[1,4].ClearContents;
15) 设置第一行字体属性：
ExcelApplication1.ActiveSheet.Rows[1].Font.Name := '隶书';
ExcelApplication1.ActiveSheet.Rows[1].Font.Color  := clBlue;
ExcelApplication1.ActiveSheet.Rows[1].Font.Bold   := True;
ExcelApplication1.ActiveSheet.Rows[1].Font.UnderLine := True;
16) 进行页面设置：
a.页眉：
   ExcelApplication1.ActiveSheet.PageSetup.CenterHeader := '报表演示';
b.页脚：
   ExcelApplication1.ActiveSheet.PageSetup.CenterFooter := '第&P页';
c.页眉到顶端边距2cm：
   ExcelApplication1.ActiveSheet.PageSetup.HeaderMargin := 2/0.035;
d.页脚到底端边距3cm：
   ExcelApplication1.ActiveSheet.PageSetup.HeaderMargin := 3/0.035;
e.顶边距2cm：
   ExcelApplication1.ActiveSheet.PageSetup.TopMargin := 2/0.035;
f.底边距2cm：
   ExcelApplication1.ActiveSheet.PageSetup.BottomMargin := 2/0.035;
g.左边距2cm：
   ExcelApplication1.ActiveSheet.PageSetup.LeftMargin := 2/0.035;
h.右边距2cm：
   ExcelApplication1.ActiveSheet.PageSetup.RightMargin := 2/0.035;
i.页面水平居中：
   ExcelApplication1.ActiveSheet.PageSetup.CenterHorizontally := 2/0.035;
j.页面垂直居中：
   ExcelApplication1.ActiveSheet.PageSetup.CenterVertically := 2/0.035;
k.打印单元格网线：
   ExcelApplication1.ActiveSheet.PageSetup.PrintGridLines := True;
17) 拷贝操作：
a.拷贝整个工作表：
   ExcelApplication1.ActiveSheet.Used.Range.Copy;
b.拷贝指定区域：
   ExcelApplication1.ActiveSheet.Range[ 'A1:E2' ].Copy;
c.从A1位置开始粘贴：
   ExcelApplication1.ActiveSheet.Range.[ 'A1' ].PasteSpecial;
d.从文件尾部开始粘贴：
   ExcelApplication1.ActiveSheet.Range.PasteSpecial;
18) 插入一行或一列：
a. ExcelApplication1.ActiveSheet.Rows[2].Insert;
b. ExcelApplication1.ActiveSheet.Columns[1].Insert;
19) 删除一行或一列：
a. ExcelApplication1.ActiveSheet.Rows[2].Delete;
b. ExcelApplication1.ActiveSheet.Columns[1].Delete;
20) 打印预览工作表：
ExcelApplication1.ActiveSheet.PrintPreview;
21) 打印输出工作表：
ExcelApplication1.ActiveSheet.PrintOut;
22) 工作表保存：
if not ExcelApplication1.ActiveWorkBook.Saved then
  ExcelApplication1.ActiveSheet.PrintPreview;
23) 工作表另存为：
ExcelApplication1.SaveAs( 'C:/Excel/Demo1.xls' );
24) 放弃存盘：
ExcelApplication1.ActiveWorkBook.Saved := True;
25) 关闭工作簿：
ExcelApplication1.WorkBooks.Close;
26) 退出 Excel：
ExcelApplication1.Quit;
ExcelApplication1.Disconnect;
本人 收藏

对不起我还需要一个锁定功能啊，就是输出到EXCEL后只能看，不能进行手工修改

Xl.Cells.Select;//Select All Cells
Xl.Selection.Locked = True;// Lock Selected Cells

//Xl:=CreateOleObject('Excel.Application');

---

procedure TForm1.BitBtn4Click(Sender: TObject);
var
  ExcelApp, Sheet: Variant;
begin
  if OpenDialog1.Execute then
  begin
    ExcelApp := CreateOleObject( 'Excel.Application' );
    ExcelApp.Workbooks.Open(OpenDialog1.FileName);
    Sheet    := ExcelApp.ActiveSheet;
    Caption  := 'Row Count: ' + IntToStr(Sheet.UsedRange.Rows.Count);
    ExcelApp.Quit;
    Sheet    := Unassigned;
    ExcelApp := Unassigned;
  end;
end;

---

procedure CopyDbDataToExcel(Target: TDbgrid);
var
  iCount, jCount: Integer;
  XLApp: Variant;
  Sheet: Variant;
begin
  Screen.Cursor := crHourGlass;
  if not VarIsEmpty(XLApp) then
  begin
    XLApp.DisplayAlerts := False;
    XLApp.Quit;
    VarClear(XLApp);
  end;
  //通过ole创建Excel对象
  try
    XLApp := CreateOleObject('Excel.Application');
  except
    Screen.Cursor := crDefault;
    Exit;
  end;
  XLApp.WorkBooks.Add[XLWBatWorksheet];
  XLApp.WorkBooks[1].WorkSheets[1].Name := '测试工作薄';
  Sheet := XLApp.Workbooks[1].WorkSheets['测试工作薄'];
  if not Target.DataSource.DataSet.Active then
  begin
     Screen.Cursor := crDefault;
     Exit;
  end;
  Target.DataSource.DataSet.first;

for iCount := 0 to Target.Columns.Count - 1 do
  begin
     Sheet.cells[1, iCount + 1] := Target.Columns.Items[iCount].Title.Caption;
  end;
  jCount := 1;
  while not Target.DataSource.DataSet.Eof do
  begin
     for iCount := 0 to Target.Columns.Count - 1 do
     begin
       Sheet.cells[jCount + 1, iCount + 1] := Target.Columns.Items[iCount].Field.AsString;
     end;
     Inc(jCount);
     Target.DataSource.DataSet.Next;
  end;
  XlApp.Visible := True;
  Screen.Cursor := crDefault;
end;

看看我的函数
function ExportToExcel(Header: String;
  vDataSet: TDataSet): Boolean;
var
  I,VL_I,j: integer;
  S,SysPath: string;
  MsExcel:Variant;
begin
  Result:=true;
  if Application.MessageBox('您确信将数据导入到Excel吗?','提示！',MB_OKCANCEL + MB_DEFBUTTON1) = IDOK then
  begin
      SysPath:=ExtractFilePath(application.exename);
      with TStringList.Create do
      try
        vDataSet.First ;
        S:=S+Header;
    //    system.Delete(s,1,1);
        add(s);
        s:=';
        For I:=0 to vDataSet.fieldcount-1 do
          begin
            If vDataSet.fields[I].visible=true then
               S:=S+#9+vDataSet.fields[I].displaylabel;
          end;
        system.Delete(s,1,1);
        add(s);
        while not vDataSet.Eof do
        begin
          S := ';
          for I := 0 to vDataSet.FieldCount -1 do
            begin
              If vDataSet.fields[I].visible=true then
                 S := S + #9 + vDataSet.Fields[I].AsString;
            end;
          System.Delete(S, 1, 1);
          Add(S);
          vDataSet.Next;
        end;
        Try
          SaveToFile(SysPath+'/Tem.xls');
        Except
          ShowMessage('写文件时发生保护性错误，Excel 如在运行，请先关闭！');
          Result:=false;
          exit;
        end;
      finally
        Free;
      end;
      Try
        MSExcel:=CreateOleObject('Excel.Application');
      Except
        ShowMessage('Excel 没有安装，请先安装！');
        Result:=false;
        exit;
      end;
      Try
        MSExcel.workbooks.open(SysPath+'/Tem.xls');
      Except
        ShowMessage('打开临时文件时出错，请检查'+SysPath+'/Tem.xls');
        Result:=false;
        exit;
      end;
        MSExcel.visible:=True;
        for VL_I :=1 to 4 do
        MSExcel.Selection.Borders[VL_I].LineStyle := 0;
        MSExcel.cells.select;
        MSExcel.Selection.HorizontalAlignment :=3;
        MSExcel.Selection.Borders[1].LineStyle := 0;

MSExcel.Range['A1'].Select;
      MSExcel.Selection.Font.Size :=24;

J:=0 ;
      for i:=0 to vdataset.fieldcount-1 do
          if vDataSet.fields[I].visible  then
             J:=J+1;

VL_I :=J;
      MSExcel.Range['A1:'+F_ColumnName(VL_I)+'1'].Select;
      MSExcel.Range['A1:'+F_ColumnName(VL_I)+'1'].Merge;
  end
  else
    Result:=false;
end;

转别人的组件
unit OleExcel;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  comobj, DBTables, Grids;
type
  TOLEExcel = class(TComponent)
  private
    FExcelCreated: Boolean;
    FVisible: Boolean;
    FExcel: Variant;
    FWorkBook: Variant;
    FWorkSheet: Variant;
    FCellFont: TFont;
    FTitleFont: TFont;
    FFontChanged: Boolean;
    FIgnoreFont: Boolean;
    FFileName: TFileName;
    procedure SetExcelCellFont(var Cell: Variant);
    procedure SetExcelTitleFont(var Cell: Variant);
    procedure GetTableColumnName(const Table: TTable; var Cell: Variant);
    procedure GetQueryColumnName(const Query: TQuery; var Cell: Variant);
    procedure GetFixedCols(const StringGrid: TStringGrid; var Cell: Variant);
    procedure GetFixedRows(const StringGrid: TStringGrid; var Cell: Variant);
    procedure GetStringGridBody(const StringGrid: TStringGrid; var Cell: Variant);
  protected
    procedure SetCellFont(NewFont: TFont);
    procedure SetTitleFont(NewFont: TFont);
    procedure SetVisible(DoShow: Boolean);
    function GetCell(ACol, ARow: Integer): string;
    procedure SetCell(ACol, ARow: Integer; const Value: string);

function GetDateCell(ACol, ARow: Integer): TDateTime;
    procedure SetDateCell(ACol, ARow: Integer; const Value: TDateTime);
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure CreateExcelInstance;
    property Cell[ACol, ARow: Integer]: string read GetCell write SetCell;
    property DateCell[ACol, ARow: Integer]: TDateTime read GetDateCell write SetDateCell;
    function IsCreated: Boolean;
    procedure TableToExcel(const Table: TTable);
    procedure QueryToExcel(const Query: TQuery);
    procedure StringGridToExcel(const StringGrid: TStringGrid);
    procedure SaveToExcel(const FileName: string);
  published
    property TitleFont: TFont read FTitleFont write SetTitleFont;
    property CellFont: TFont read FCellFont write SetCellFont;
    property Visible: Boolean read FVisible write SetVisible;
    property IgnoreFont: Boolean read FIgnoreFont write FIgnoreFont;
    property FileName: TFileName read FFileName write FFileName;
  end;

procedure Register;

implementation

constructor TOLEExcel.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  FIgnoreFont := True;
  FCellFont := TFont.Create;
  FTitleFont := TFont.Create;
  FExcelCreated := False;
  FVisible := False;
  FFontChanged := False;
end;

destructor TOLEExcel.Destroy;
begin
  FCellFont.Free;
  FTitleFont.Free;
  inherited Destroy;
end;

procedure TOLEExcel.SetExcelCellFont(var Cell: Variant);
begin
  if FIgnoreFont then exit;
  with FCellFont do
    begin
      Cell.Font.Name := Name;
      Cell.Font.Size := Size;
      Cell.Font.Color := Color;
      Cell.Font.Bold := fsBold in Style;
      Cell.Font.Italic := fsItalic in Style;
      Cell.Font.UnderLine := fsUnderline in Style;
      Cell.Font.Strikethrough := fsStrikeout in Style;
    end;
end;

procedure TOLEExcel.SetExcelTitleFont(var Cell: Variant);
begin
  if FIgnoreFont then exit;
  with FTitleFont do
    begin
      Cell.Font.Name := Name;
      Cell.Font.Size := Size;
      Cell.Font.Color := Color;
      Cell.Font.Bold := fsBold in Style;
      Cell.Font.Italic := fsItalic in Style;
      Cell.Font.UnderLine := fsUnderline in Style;
      Cell.Font.Strikethrough := fsStrikeout in Style;
    end;
end;

procedure TOLEExcel.SetVisible(DoShow: Boolean);
begin
  if not FExcelCreated then exit;
  if DoShow then
    FExcel.Visible := True
  else
    FExcel.Visible := False;
end;

function TOLEExcel.GetCell(ACol, ARow: Integer): string;
begin
  if not FExcelCreated then exit;
  result := FWorkSheet.Cells[ARow, ACol];
end;

procedure TOLEExcel.SetCell(ACol, ARow: Integer; const Value: string);
var
  Cell: Variant;
begin
  if not FExcelCreated then exit;
  Cell := FWorkSheet.Cells[ARow, ACol];
  SetExcelCellFont(Cell);
  Cell.Value := Value;
end;

function TOLEExcel.GetDateCell(ACol, ARow: Integer): TDateTime;
begin
  if not FExcelCreated then
    begin
      result := 0;
      exit;
    end;
  result := StrToDateTime(FWorkSheet.Cells[ARow, ACol]);
end;

procedure TOLEExcel.SetDateCell(ACol, ARow: Integer; const Value: TDateTime);
var
  Cell: Variant;
begin
  if not FExcelCreated then exit;
  Cell := FWorkSheet.Cells[ARow, ACol];
  SetExcelCellFont(Cell);
  Cell.Value := '' + DateTimeToStr(Value);
end;

procedure TOLEExcel.CreateExcelInstance;
begin
  try
    FExcel := CreateOLEObject('Excel.Application');
    FWorkBook := FExcel.WorkBooks.Add;
    FWorkSheet := FWorkBook.WorkSheets.Add;
    FExcelCreated := True;
  except
    FExcelCreated := False;
  end;
end;

function TOLEExcel.IsCreated: Boolean;
begin
  result := FExcelCreated;
end;

procedure TOLEExcel.SetTitleFont(NewFont: TFont);
begin
  if NewFont <> FTitleFont then
    FTitleFont.Assign(NewFont);
end;

procedure TOLEExcel.SetCellFont(NewFont: TFont);
begin
  if NewFont <> FCellFont then
    FCellFont.Assign(NewFont);
end;

procedure TOLEExcel.GetTableColumnName(const Table: TTable; var Cell: Variant);
var
  Col: integer;
begin
  for Col := 0 to Table.FieldCount - 1 do
    begin
      Cell := FWorkSheet.Cells[1, Col + 1];
      SetExcelTitleFont(Cell);
      Cell.Value := Table.Fields[Col].FieldName;
    end;
end;

procedure TOLEExcel.TableToExcel(const Table: TTable);
var
  Col, Row: LongInt;
  Cell: Variant;
begin
  if not FExcelCreated then exit;
  if Table.Active = False then exit;

GetTableColumnName(Table, Cell);
  Row := 2;
  with Table do
    begin
      first;
      while not EOF do
        begin
          for Col := 0 to FieldCount - 1 do
            begin
              Cell := FWorkSheet.Cells[Row, Col + 1];
              SetExcelCellFont(Cell);
              Cell.Value := Fields[Col].AsString;
            end;
          next;
          Inc(Row);
        end;
    end;
end;

procedure TOLEExcel.GetQueryColumnName(const Query: TQuery; var Cell: Variant);
var
  Col: integer;
begin
  for Col := 0 to Query.FieldCount - 1 do
    begin
      Cell := FWorkSheet.Cells[1, Col + 1];
      SetExcelTitleFont(Cell);
      Cell.Value := Query.Fields[Col].FieldName;
    end;
end;

procedure TOLEExcel.QueryToExcel(const Query: TQuery);
var
  Col, Row: LongInt;
  Cell: Variant;
begin
  if not FExcelCreated then exit;
  if Query.Active = False then exit;

GetQueryColumnName(Query, Cell);
  Row := 2;
  with Query do
    begin
      first;
      while not EOF do
        begin
          for Col := 0 to FieldCount - 1 do
            begin
              Cell := FWorkSheet.Cells[Row, Col + 1];
              SetExcelCellFont(Cell);
              Cell.Value := Fields[Col].AsString;
            end;
          next;
          Inc(Row);
        end;
    end;
end;

procedure TOLEExcel.GetFixedCols(const StringGrid: TStringGrid; var Cell: Variant);
var
  Col, Row: LongInt;
begin
  for Col := 0 to StringGrid.FixedCols - 1 do
    for Row := 0 to StringGrid.RowCount - 1 do
      begin
        Cell := FWorkSheet.Cells[Row + 1, Col + 1];
        SetExcelTitleFont(Cell);
        Cell.Value := StringGrid.Cells[Col, Row];
      end;
end;

procedure TOLEExcel.GetFixedRows(const StringGrid: TStringGrid; var Cell: Variant);
var
  Col, Row: LongInt;
begin
  for Row := 0 to StringGrid.FixedRows - 1 do
    for Col := 0 to StringGrid.ColCount - 1 do
      begin
        Cell := FWorkSheet.Cells[Row + 1, Col + 1];
        SetExcelTitleFont(Cell);
        Cell.Value := StringGrid.Cells[Col, Row];
      end;
end;

procedure TOLEExcel.GetStringGridBody(const StringGrid: TStringGrid; var Cell: Variant);
var
  Col, Row, x, y: LongInt;
begin
  Col := StringGrid.FixedCols;
  Row := StringGrid.FixedRows;
  for x := Row to StringGrid.RowCount - 1 do
    for y := Col to StringGrid.ColCount - 1 do
      begin
        Cell := FWorkSheet.Cells[x + 1, y + 1];
        SetExcelCellFont(Cell);
        Cell.Value := StringGrid.Cells[y, x];
      end;
end;

procedure TOLEExcel.StringGridToExcel(const StringGrid: TStringGrid);
var
  Cell: Variant;
begin
  if not FExcelCreated then exit;
  GetFixedCols(StringGrid, Cell);
  GetFixedRows(StringGrid, Cell);
  GetStringGridBody(StringGrid, Cell);
end;

procedure TOLEExcel.SaveToExcel(const FileName: string);
begin
  if not FExcelCreated then exit;
  FWorkSheet.SaveAs(FileName);
end;

procedure Register;
begin
  RegisterComponents('Tanglu', [TOLEExcel]);
end;

end.
----------------------------------------------

根据别人的组件改写的支持ADO

unit AdoToOleExcel;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  comobj, DBTables, Grids,ADODB;
type
  TAdoToOleExcel = class(TComponent)
  private
    FExcelCreated: Boolean;
    FVisible: Boolean;
    FExcel: Variant;
    FWorkBook: Variant;
    FWorkSheet: Variant;
    FCellFont: TFont;
    FTitleFont: TFont;
    FFontChanged: Boolean;
    FIgnoreFont: Boolean;
    FFileName: TFileName;
    procedure SetExcelCellFont(var Cell: Variant);
    procedure SetExcelTitleFont(var Cell: Variant);
    procedure GetTableColumnName(const AdoTable: TAdoTable; var Cell: Variant);
    procedure GetQueryColumnName(const AdoQuery: TAdoQuery; var Cell: Variant);
    procedure GetFixedCols(const StringGrid: TStringGrid; var Cell: Variant);
    procedure GetFixedRows(const StringGrid: TStringGrid; var Cell: Variant);
    procedure GetStringGridBody(const StringGrid: TStringGrid; var Cell: Variant);
  protected
    procedure SetCellFont(NewFont: TFont);
    procedure SetTitleFont(NewFont: TFont);
    procedure SetVisible(DoShow: Boolean);
    function GetCell(ACol, ARow: Integer): string;
    procedure SetCell(ACol, ARow: Integer; const Value: string);

function GetDateCell(ACol, ARow: Integer): TDateTime;
    procedure SetDateCell(ACol, ARow: Integer; const Value: TDateTime);
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure CreateExcelInstance;
    property Cell[ACol, ARow: Integer]: string read GetCell write SetCell;
    property DateCell[ACol, ARow: Integer]: TDateTime read GetDateCell write SetDateCell;
    function IsCreated: Boolean;
    procedure ADOTableToExcel(const ADOTable: TADOTable);
    procedure ADOQueryToExcel(const ADOQuery: TADOQuery);
    procedure StringGridToExcel(const StringGrid: TStringGrid);
    procedure SaveToExcel(const FileName: string);
  published
    property TitleFont: TFont read FTitleFont write SetTitleFont;
    property CellFont: TFont read FCellFont write SetCellFont;
    property Visible: Boolean read FVisible write SetVisible;
    property IgnoreFont: Boolean read FIgnoreFont write FIgnoreFont;
    property FileName: TFileName read FFileName write FFileName;
  end;

procedure Register;

implementation

constructor TAdoToOleExcel.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  FIgnoreFont := True;
  FCellFont := TFont.Create;
  FTitleFont := TFont.Create;
  FExcelCreated := False;
  FVisible := False;
  FFontChanged := False;
end;

destructor TAdoToOleExcel.Destroy;
begin
  FCellFont.Free;
  FTitleFont.Free;
  inherited Destroy;
end;

procedure TAdoToOleExcel.SetExcelCellFont(var Cell: Variant);
begin
  if FIgnoreFont then exit;
  with FCellFont do
    begin
      Cell.Font.Name := Name;
      Cell.Font.Size := Size;
      Cell.Font.Color := Color;
      Cell.Font.Bold := fsBold in Style;
      Cell.Font.Italic := fsItalic in Style;
      Cell.Font.UnderLine := fsUnderline in Style;
      Cell.Font.Strikethrough := fsStrikeout in Style;
    end;
end;

procedure TAdoToOleExcel.SetExcelTitleFont(var Cell: Variant);
begin
  if FIgnoreFont then exit;
  with FTitleFont do
    begin
      Cell.Font.Name := Name;
      Cell.Font.Size := Size;
      Cell.Font.Color := Color;
      Cell.Font.Bold := fsBold in Style;
      Cell.Font.Italic := fsItalic in Style;
      Cell.Font.UnderLine := fsUnderline in Style;
      Cell.Font.Strikethrough := fsStrikeout in Style;
    end;
end;

procedure TAdoToOleExcel.SetVisible(DoShow: Boolean);
begin
  if not FExcelCreated then exit;
  if DoShow then
    FExcel.Visible := True
  else
    FExcel.Visible := False;
end;

function TAdoToOleExcel.GetCell(ACol, ARow: Integer): string;
begin
  if not FExcelCreated then exit;
  result := FWorkSheet.Cells[ARow, ACol];
end;

procedure TAdoToOleExcel.SetCell(ACol, ARow: Integer; const Value: string);
var
  Cell: Variant;
begin
  if not FExcelCreated then exit;
  Cell := FWorkSheet.Cells[ARow, ACol];
  SetExcelCellFont(Cell);
  Cell.Value := Value;
end;

function TAdoToOleExcel.GetDateCell(ACol, ARow: Integer): TDateTime;
begin
  if not FExcelCreated then
    begin
      result := 0;
      exit;
    end;
  result := StrToDateTime(FWorkSheet.Cells[ARow, ACol]);
end;

procedure TAdoToOleExcel.SetDateCell(ACol, ARow: Integer; const Value: TDateTime);
var
  Cell: Variant;
begin
  if not FExcelCreated then exit;
  Cell := FWorkSheet.Cells[ARow, ACol];
  SetExcelCellFont(Cell);
  Cell.Value := '' + DateTimeToStr(Value);
end;

procedure TAdoToOleExcel.CreateExcelInstance;
begin
  try
    FExcel := CreateOLEObject('Excel.Application');
    FWorkBook := FExcel.WorkBooks.Add;
    FWorkSheet := FWorkBook.WorkSheets.Add;
    FExcelCreated := True;
  except
    FExcelCreated := False;
  end;
end;

function TAdoToOleExcel.IsCreated: Boolean;
begin
  result := FExcelCreated;
end;

procedure TAdoToOleExcel.SetTitleFont(NewFont: TFont);
begin
  if NewFont <> FTitleFont then
    FTitleFont.Assign(NewFont);
end;

procedure TAdoToOleExcel.SetCellFont(NewFont: TFont);
begin
  if NewFont <> FCellFont then
    FCellFont.Assign(NewFont);
end;

procedure TAdoToOleExcel.GetTableColumnName(const ADOTable: TADOTable; var Cell: Variant);
var
  Col: integer;
begin
  for Col := 0 to ADOTable.FieldCount - 1 do
    begin
      Cell := FWorkSheet.Cells[1, Col + 1];
      SetExcelTitleFont(Cell);
      Cell.Value := ADOTable.Fields[Col].FieldName;
    end;
end;

procedure TAdoToOleExcel.ADOTableToExcel(const ADOTable: TADOTable);
var
  Col, Row: LongInt;
  Cell: Variant;
begin
  if not FExcelCreated then exit;
  if ADOTable.Active = False then exit;

GetTableColumnName(ADOTable, Cell);
  Row := 2;
  with ADOTable do
    begin
      first;
      while not EOF do
        begin
          for Col := 0 to FieldCount - 1 do
            begin
              Cell := FWorkSheet.Cells[Row, Col + 1];
              SetExcelCellFont(Cell);
              Cell.Value := Fields[Col].AsString;
            end;
          next;
          Inc(Row);
        end;
    end;
end;

procedure TAdoToOleExcel.GetQueryColumnName(const ADOQuery: TADOQuery; var Cell: Variant);
var
  Col: integer;
begin
  for Col := 0 to ADOQuery.FieldCount - 1 do
    begin
      Cell := FWorkSheet.Cells[1, Col + 1];
      SetExcelTitleFont(Cell);
      Cell.Value := ADOQuery.Fields[Col].FieldName;
    end;
end;

procedure TAdoToOleExcel.ADOQueryToExcel(const ADOQuery: TADOQuery);
var
  Col, Row: LongInt;
  Cell: Variant;
begin
  if not FExcelCreated then exit;
  if ADOQuery.Active = False then exit;

GetQueryColumnName(ADOQuery, Cell);
  Row := 2;
  with ADOQuery do
    begin
      first;
      while not EOF do
        begin
          for Col := 0 to FieldCount - 1 do
            begin
              Cell := FWorkSheet.Cells[Row, Col + 1];
              SetExcelCellFont(Cell);
              Cell.Value := Fields[Col].AsString;
            end;
          next;
          Inc(Row);
        end;
    end;
end;

procedure TAdoToOleExcel.GetFixedCols(const StringGrid: TStringGrid; var Cell: Variant);
var
  Col, Row: LongInt;
begin
  for Col := 0 to StringGrid.FixedCols - 1 do
    for Row := 0 to StringGrid.RowCount - 1 do
      begin
        Cell := FWorkSheet.Cells[Row + 1, Col + 1];
        SetExcelTitleFont(Cell);
        Cell.Value := StringGrid.Cells[Col, Row];
      end;
end;

procedure TAdoToOleExcel.GetFixedRows(const StringGrid: TStringGrid; var Cell: Variant);
var
  Col, Row: LongInt;
begin
  for Row := 0 to StringGrid.FixedRows - 1 do
    for Col := 0 to StringGrid.ColCount - 1 do
      begin
        Cell := FWorkSheet.Cells[Row + 1, Col + 1];
        SetExcelTitleFont(Cell);
        Cell.Value := StringGrid.Cells[Col, Row];
      end;
end;

procedure TAdoToOleExcel.GetStringGridBody(const StringGrid: TStringGrid; var Cell: Variant);
var
  Col, Row, x, y: LongInt;
begin
  Col := StringGrid.FixedCols;
  Row := StringGrid.FixedRows;
  for x := Row to StringGrid.RowCount - 1 do
    for y := Col to StringGrid.ColCount - 1 do
      begin
        Cell := FWorkSheet.Cells[x + 1, y + 1];
        SetExcelCellFont(Cell);
        Cell.Value := StringGrid.Cells[y, x];
      end;
end;

procedure TAdoToOleExcel.StringGridToExcel(const StringGrid: TStringGrid);
var
  Cell: Variant;
begin
  if not FExcelCreated then exit;
  GetFixedCols(StringGrid, Cell);
  GetFixedRows(StringGrid, Cell);
  GetStringGridBody(StringGrid, Cell);
end;

procedure TAdoToOleExcel.SaveToExcel(const FileName: string);
begin
  if not FExcelCreated then exit;
  FWorkSheet.SaveAs(FileName);
end;

procedure Register;
begin
  RegisterComponents('Freeman', [TAdoToOleExcel]);
end;

end.

---

数据导出为Excel格式
首先要创建一个公共单元，名字你们可以随便起。
以下是我创建的公共单元的全部代码：
unit UnitDatatoExcel;
interface
uses
  Windows,Messages, SysUtils, Classes, Graphics, Controls, Forms,Dialogs,
  DB, ComObj;
type
  TKHTMLFormatCellEvent = procedure(Sender: TObject; CellRow,CellColumn: Integer; FieldName: string;
    var CustomAttrs, CellData: string) of object;
  TDataSetToExcel = class(TComponent)
  private
    FDataSet: TDataSet;
    FOnFormatCell: TKHTMLFormatCellEvent;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure Transfer(const FileName: string; Title: string = ');
  published
    property DataSet: TDataSet read FDataSet write FDataSet;
  end;
implementation
constructor TDataSetToExcel.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  FDataSet := nil;
end;
destructor TDataSetToExcel.Destroy;
begin
  inherited;
end;
procedure TDataSetToExcel.Transfer(const FileName:string;Title:string = ');
var
  ExcelApp, MyWorkBook: Variant;
  i: byte;
  j, a: integer;
  s, k, b, CustomAttrs: string;
begin
  try
    ExcelApp := CreateOleObject('Excel.Application');
    MyWorkBook := CreateOleObject('Excel.Sheet');
  except
    on Exception do raise exception.Create('无法打开Excel文件，请确认已经安装Execl')
  end;
  MyWorkBook := ExcelApp.WorkBooks.Add;
  MyWorkBook.WorkSheets[1].Range['A1:D1'].Merge(True);
  MyWorkBook.WorkSheets[1].Range['A1:D2'].HorizontalAlignment := $FFFFEFF4;
  MyWorkBook.WorkSheets[1].Cells[1, 1].Value := Title;
  with FDataSet do
  begin
    i := 2;
    for j := 0 to FieldCount - 1 do
    begin
      if Fields[j].Visible then
      begin
        b := Fields[j].DisplayLabel;
        CustomAttrs := ';
        if Assigned(FOnFormatCell) then
          FOnFormatCell(Self, 1, i,
            Fields[j].FieldName, CustomAttrs, b);
        MyWorkBook.WorkSheets[1].Cells[i, j + 1].Value := b;
      end;
    end;
    i := 3;
    Close;
    Open;
    First;
    a := 2;
    while not Eof do
    begin
      for j := 0 to FieldCount - 1 do
      begin
        if Fields[j].Visible then
        begin
          CustomAttrs := ';
          k := Fields[j].Text;
          if Assigned(FOnFormatCell) then
            FOnFormatCell(Self, i, a,
              Fields[j].FieldName, CustomAttrs, k);
          MyWorkBook.WorkSheets[1].Cells[i, j + 1].Value := k;
          inc(a);
        end;
      end;
      Inc(i);
      Next;
    end;
  end;
  s := 'A3:D' + IntToStr(i - 1);
  s := 'A1:D' + IntToStr(i - 1);
  MyWorkBook.WorkSheets[1].Columns[1].ColumnWidth := 20;
  MyWorkBook.WorkSheets[1].Columns[4].ColumnWidth := 25;
  MyWorkBook.WorkSheets[1].Rows[1].RowHeight := 50;
  MyWorkBook.WorkSheets[1].Rows[1].VerticalAlignMent := $FFFFEFF4;
  MyWorkBook.WorkSheets[1].Range[s].Font.Name := '仿宋';
  s := 'A2:D' + IntToStr(i - 1);
  MyWorkBook.WorkSheets[1].Range[s].Borders.LineStyle := 1;
  MyWorkBook.WorkSheets[1].PageSetup.CenterHorizontally := True;
  MyWorkBook.WorkSheets[1].PageSetup.PrintTitleRows := 'A1';
  try
    MyWorkBook.Saveas(FileName);
    MyWorkBook.Close;
  except
    MyWorkBook.Close;
  end;
  ExcelApp.Quit;
  ExcelApp := UnAssigned;
end;
end.
然后在调用它的单元里引用它就行了。
下面是调用它的代码：
procedure ToGetherExcel(NewData: TDataSet; NewString: string);
var
  DataExcel: TDataSetToExcel;
  saveDlg: TSaveDialog;
begin
  saveDlg := TSaveDialog.Create(nil);  //创建一个存储对话框
  DataExcel := TDataSetToExcel.Create(nil);
  try
    saveDlg.Filter := 'Execl 文件(*.XLS)|*.XLS';
    saveDlg.DefaultExt := 'XLS';
    saveDlg.FileName := NewString;
    if saveDlg.Execute then
    begin
      DataExcel.DataSet := NewData;  //连接的数据集
      DataExcel.DataSet.DisableControls;
      DataExcel.Transfer(saveDlg.FileName, NewString);
      DataExcel.DataSet.EnableControls;
      AlterMesg('导出完毕', '提示信息');
    end;
  finally
    saveDlg.Free;
    DataExcel.Free;
  end;
end;
如果谁还有比着更好的办法，请告诉我，咱们共同进步：）

---

我给大伙发一个吧,调用过程，很方便,
这里DBGrid可更改为Query等与数据库相关的
procedure DBTOExcel(sDBGrid: DBGrid; Title,Fn: string);
//uses ComObj;
//sDBGrid:数据源
//Title:标题
//Fn:保存文件
var
  ExcelApp: Variant;
  i,j,k: Integer;
  __ColStr,__s:String;
begin
  try
    ExcelApp := CreateOleObject('Excel.Application');
  except
    //on Exception do raise exception.Create('无法创建Xls文件，请确认是否安装EXCEL');
    application.MessageBox('系统中的MS Excel软件没有安装或安装不正确！', '错误', MB_ICONERROR + MB_OK);
    exit;
  end;
  ExcelApp.visible := False;
  ExcelApp.WorkBooks.Add;
  ExcelApp.caption := Title;
  __ColStr:=Chr(65+sDBGrid.FieldCount-1);
  ExcelApp.worksheets[1].range['A1:'+__ColStr+'1'].Merge(True);
  //写入标题行
  ExcelApp.Cells[1, 1].Value := Title;
  ExcelApp.worksheets[1].range['A1:'+__ColStr+'3'].HorizontalAlignment := $FFFFEFF4;
  ExcelApp.worksheets[1].range['A1:'+__ColStr+'3'].VerticalAlignment := $FFFFEFF4;
  ExcelApp.worksheets[1].range['A2:B2'].Merge(True);
  ExcelApp.worksheets[1].range['C2:D2'].Merge(True);
  ExcelApp.Cells[2, 1].Value := '制表人：'+Myvalue.FUserName;
  ExcelApp.Cells[2, 3].Value := '制表日期：'+DateToStr(Date());
  for i := 1 to sDBGrid.FieldCount do begin
    //各个字段的宽度
    ExcelApp.worksheets[1].Columns[i].ColumnWidth:=sDBGrid.Fields[i-1].DisplayWidth;
    //字段标题
    ExcelApp.Cells[3, i].Value := sDBGrid.Columns[i-1].Title.caption;
  end;
  ExcelApp.worksheets[1].Range['A1:'+__ColStr+'1'].Font.Name := '黑体';
  ExcelApp.worksheets[1].Range['A1:'+__ColStr+'1'].Font.Size := 16;
  ExcelApp.worksheets[1].range['A1:'+__ColStr+'3'].font.bold:=true;
  ExcelApp.worksheets[1].Range['A2:'+__ColStr+'3'].Font.Size := 10;
  i := 4;
  k := 0;
  sDBGrid.DataSource.DataSet.First;
  while not sDBGrid.DataSource.DataSet.Eof do begin
    for j := 0 to sDBGrid.FieldCount - 1 do begin
      ExcelApp.Cells[i, j + 1].Value := sDBGrid.Fields[j].AsString;
    end;
    sDBGrid.DataSource.DataSet.Next;
    i := i + 1;
    k:=k+1;
    __s:= 'A3:'+__ColStr+IntToStr(i-1);
  end;
  sDBGrid.DataSource.DataSet.First;
  ExcelApp.worksheets[1].Range[__s].HorizontalAlignment := $FFFFEFF4;
  ExcelApp.worksheets[1].Range[__s].VerticalAlignment := $FFFFEFF4;
  ExcelApp.worksheets[1].Range[__s].Font.Name := '宋体';
  ExcelApp.worksheets[1].Range[__s].Font.Size := 10;
  ExcelApp.worksheets[1].Range[__s].Borders.LineStyle := 1;
  ExcelApp.ActiveSheet.PageSetup.RightMargin := 0.5/0.035;
  ExcelApp.ActiveSheet.PageSetup.LeftMargin := 2/0.035;
  ExcelApp.ActiveSheet.PageSetup.BottomMargin := 0.5/0.035;
  ExcelApp.visible := True;
  ExcelApp.ActiveCell.Cells.Select;
  ExcelApp.Selection.Columns.AutoFit;
  try
    ExcelApp.ActiveWorkBook.SaveAs(Fn);
  except
  end;  
end;

//导出数据到Excel
procedure ToExcel(DBGrid:TDBGrid);
var
  ExcelApp: Variant;
  i,j,k:integer;
  FileName:string;
  DlgSave:TsaveDialog;
Begin
  DlgSave:=TsaveDialog.Create(nil);
  DlgSave.Filter:='*.xls|*.xls';
  if DlgSave.Execute then
  Begin
    application.ProcessMessages;
    Filename:=DlgSave.FileName;
    ExcelApp := CreateOleObject( 'Excel.Application' );
    ExcelApp.Caption :='能创监控系统日志数据';//'Microsoft Excel';
    ExcelApp.WorkBooks.Add;
    application.ProcessMessages;
    ExcelApp.WorkSheets[1].Activate;
    K:=1;
    For i:=0 To DBGrid.Columns.Count-1 Do
    Begin
      if DBGrid.Columns[i].Visible Then
      Begin
        ExcelApp.Cells[1,K]:=DBGrid.Columns[i].Title.Caption;
        k:=k+1;
      End;{if}
    End;{for}
    ExcelApp.rows[1].font.name:='宋体';
    ExcelApp.rows[1].font.size:=10;
    ExcelApp.rows[1].Font.Color:=clBlack;
    ExcelApp.rows[1].Font.Bold:=true;
    j:=1;
    For i:=0 To DBGrid.Columns.Count-1 Do
    Begin
      If DBGrid.Columns[i].Visible Then
      Begin
        ADOQuery_DB.First;
        for k:=1 To ADOQuery_DB.RecordCount-1 Do
        Begin
          ExcelApp.Cells[K+1,j]:=ADOQuery_DB.FieldByName(DBGrid.Columns[i].FieldName).Asstring;
          ADOQuery_DB.Next;
        End;{for}
      j:=j+1;
    End;{if}
    End;{for}
    For I:=1 To ADOQuery_DB.recordcount Do
    ExcelApp.rows[i].Font.SIZE:=9;
    ExcelApp.Columns.AutoFit;
    ExcelApp.ActiveWorkBook.SaveAs(FileName);
    ExcelApp.WorkBooks.Close;
    Application.MessageBox('数据导出成功....','数据导出',0);
    ExcelApp.Quit;
    ExcelApp:=Unassigned;
    DlgSave.Destroy;
  End;
end;
测试通过！

---

我可以发一段给你
先在程序上放上三个控件，TExcelApplication，TExcelWorkbook，TExcelWorkSheet，它们都在Server组件板上。
要控制Excel，就是采用自动化编程。以Excel作为自动化服务器。
首先，建立与自动化服务器的连接：
   Excelapplication1.Connect;
   Excelapplication1.Visible[0]:=true;
   Excelapplication1.Caption:='你要的标题';
   ExcelWorkbook1.ConnectTo(Excelapplication1.Workbooks.Add(null,0) );
   Excelworksheet1.ConnectTo(Excelworkbook1.Worksheets[0] as _worksheet) ;

然后就可以对Excel进行控件了：
  从数据库导入数据：
  Excel.cells.item[row,col]:=table1.field[i].value;
  ....
最后不要忘了断开连接
  Excelapplication1.disconnect;
  Excelapplication1.quit;
至今是delphi菜鸟

******************************************************************

如何把在dbgrid的指定几列导到excel表里?
我的做法:用listbox1显示dbgrid的所用供选择列,listbox2用来显示要导出的列:
procedure TForm1.FormCreate(Sender: TObject);
begin
 if kadaoTable1.Active then
 kadaoTable1.GetFieldNames(Listbox1.Items);
end;
procedure TForm1.addbitbtnClick(Sender: TObject);//选择字段
begin
  try
  if listbox1.Items.Count=0 then exit;
  if listbox1.Selected[listbox1.ItemIndex] then
  begin
  Listbox2.Items.Add(Listbox1.Items[Listbox1.ItemIndex]);
  Listbox1.Items.Delete(Listbox1.ItemIndex);
  if Listbox2.Items.Count>=1 then
  DeleteBitBtn.Enabled:=True;
  end;
  except
  showmessage('你没有选择相应字段!');
  end;
end;
procedure TForm1.DeleteBitBtnClick(Sender: TObject);//撤消选择
begin
 try
 if Listbox2.Items.Count=0 then exit;
 if listbox2.Selected[Listbox2.ItemIndex] then
   begin
   Listbox1.Items.Add(Listbox2.items[Listbox2.itemindex]);
   Listbox2.Items.Delete(Listbox2.itemindex);
   end;
   if Listbox2.Items.Count=0 then
   DeleteBitBtn.Enabled:=False;
 except
 showmessage('你没有选择相应字段!');
 end;
 end;
procedure CopyDbDataToExcel(Args: array of const);
var
  iCount, jCount: Integer;
  XLApp: Variant;
  Sheet: Variant;
  I: Integer;
begin
  Screen.Cursor := crHourGlass;
  if not VarIsEmpty(XLApp) then
  begin
    XLApp.DisplayAlerts := False;
    XLApp.Quit;
    VarClear(XLApp);
  end;
   try
    XLApp := CreateOleObject('excel.Application');
  except
    Screen.Cursor := crDefault;
  Exit;
  end;

XLApp.WorkBooks.Add;
  XLApp.SheetsInNewWorkbook := High(Args) + 1;
   for I := Low(Args) to High(Args) do
  begin
    XLApp.WorkBooks[1].WorkSheets[I+1].Name := TDBGrid(Args[I].VObject).Name;
    Sheet := XLApp.Workbooks[1].WorkSheets[TDBGrid(Args[I].VObject).Name];
    if not TDBGrid(Args[I].VObject).DataSource.DataSet.Active then
    begin
      Screen.Cursor := crDefault;
      Exit;
    end;
     TDBGrid(Args[I].VObject).DataSource.DataSet.first;
    for iCount := 0 to TDBGrid(Args[I].VObject).Columns.Count - 1 do
      Sheet.Cells[1, iCount + 1] := TDBGrid(Args[I].VObject).Columns.Items[iCount].Title.Caption;
     jCount := 1;
    while not TDBGrid(Args[I].VObject).DataSource.DataSet.Eof do
    begin
      for iCount := 0 to TDBGrid(Args[I].VObject).Columns.Count - 1 do
        Sheet.Cells[jCount + 1, iCount + 1] := TDBGrid(Args[I].VObject).Columns.Items[iCount].Field.AsString;
       Inc(jCount);
      TDBGrid(Args[I].VObject).DataSource.DataSet.Next;
    end;
  end;
   XlApp.Visible := True;
  Screen.Cursor := crDefault;
end;
procedure TForm1.BitBtn3Click(Sender: TObject);//导出操作
begin
CopyDbDataToExcel([DBGrid4]);
end;
我 想解决问题有两种办法：一、直接修改CopyDbDataToExcel。二、实现dbgrid4显示的字段列与listbox2中字段同步， dbgrid4中的其余字段要删除掉，不是隐藏。也就是用listbox2中字段来控制哪些字段导入到excel表中呀,如何实现呀?  请高手指点!

*****************************

将dbgrid中数据导出到excel后,如何编写程序使excel的列宽调整为最适合的列宽?
ExcelWorkSheet1.Columns.AutoFit;

************************************

var
  s:string;
  i,j:integer;
begin
  s:='d:/aa/aa.xls'; //文件名
  if fileexists(s) then deletefile(s);
  v:=CreateOLEObject('Excel.Application'); //建立OLE对象
  V.WorkBooks.Add;
  if Checkbox1.Checked then
    begin
      V.Visible:=False;
      
      //使Excel可见，并将本程序最小化，以观察Excel的运行情况
    end
  else
    begin
      V.Visible:=True;    //True
    end;
    //使Excel窗口不可见

//Application.BringToFront; //程序前置
  try
  try
    Cursor:=crSQLWait;
    query1.DisableControls;
    For i:=0 to query1.FieldCount-1 do //字段数
    //注意：Delphi中的数组的下标是从0开始的，
    // 而Excel的表格是从1开始编号
      begin
      V.Goto('R1'+'C'+IntToStr(i+1)); //Excel的表格是从1开始编号
      V.ActiveCell.FormulaR1C1:=query1.Fields[i].FieldName;//传送字段名
      end;
    j:=2;
    query1.First;
    while not query1.EOF do
      begin
      For i:=0 to query1.FieldCount-1 do //字段数
        begin
          V.Goto('R'+IntToStr(j)+'C'+IntToStr(i+1));
          V.ActiveCell.FormulaR1C1:=query1.Fields[i].AsString;//传送内容
        end;
      query1.Next;
      j:=j+1;
     end;
    //设置保护
    ShowMessage('数据库到Excel的数据传输完毕!');
    
    except //发生错误时
    ShowMessage('没有发现Excel!');
    end;
    finally
    Cursor:=crDefault;
    query1.First;
    query1.EnableControls;
    end;
end;

//和上面的差不多，不过不是从DBGrid中导出的！上面的也不是，只是从Query中
  导出来。我也想知从DBGrid 中怎么样导出来，或直接打印也行！
************************************************

直接使用Excel对象，它是标准的COM对象，可以在Delphi中引用的。
我给你一个函数：
function ExportDataToExcel(cds: TClientDataSet; dbGrid: TDBGrid; ExcelAppData: TExcelApplication;
  Title, strWhere: String): Boolean;
var
  sheet,Range: Variant;
  i,j: Integer;
  str,fVal: String;
begin
  Result := False;
  if (cds = nil) or (not cds.Active) then Exit;
  try
    if ExcelAppData.Tag = 1 then
    begin
      ExcelAppData.Disconnect;
      ExcelAppData.Tag := 0;
    end;
    ExcelAppData.Connect;
    ExcelAppData.Visible[0] := True;
    ExcelAppData.Tag := 1;
  except
    ShowMessage('启动Excel失败，Excel可能没有安装。');
    Abort;
  end;
  cds.DisableControls;
  try
    if Trim(Title) = ' then Title := '查询结果';
    ExcelAppData.Caption := Title;
    ExcelAppData.Workbooks.Add(emptyparam,0);
    sheet := ExcelAppData.Workbooks[ExcelAppData.Workbooks.Count].Worksheets[1];

sheet.name := Title;
    i := (dbGrid.Columns.Count div 2) - 1;
    if i < 1 then i:=1;
    Sheet.Cells[1,i] := Title;
    ExcelAppData.StandardFontSize[0] := 9; //设置表格字体
    if dbGrid.Columns.Count < 24 then
    begin
      str := Char(Ord('A') + dbGrid.Columns.Count -1); // 计算最后一列的列标
      Range := Sheet.Range['A3:' + str + '3'];  //取出表头的边界
      Range.Columns.Interior.ColorIndex := 8;   //设置表头的颜色
      //计算表格区域
      str := 'A3:' + str + IntToStr(cds.RecordCount + 3);
      Range := Sheet.Range[str]; //取出表格数据区域边界
      Range.Borders.LineStyle := xlContinuous;   // 设置表格的线条
    end;
    Sheet.Cells[2,1] := strWhere;//'日期：' + DateToStr(Date);
    //写表头
    for j := 0 to dbGrid.Columns.Count -1 do
    begin
      Sheet.Cells[3,j + 1] := dbGrid.Columns.Items[j].Title.Caption;
      Sheet.Columns.Columns[j+1].ColumnWidth := dbGrid.Columns.Items[j].Width div 6;
    end;

//写表的内容
    cds.First;
    for i:= 4 to cds.RecordCount + 3 do
    begin
      for j := 0 to dbGrid.Columns.Count - 1 do
      begin
        fVal := Trim(cds.FieldByName(dbGrid.Columns.Items[j].FieldName).AsString);
        Sheet.Cells[i,j + 1] := fVal;
      end;
      cds.Next;
    end;
    Sleep(1000);   //延时1秒，等待Excel处理完成
    Result := True;
  except on E: Exception do
    ShowMessage('数据导出时出现异常！' + E.Message);
  end;
  ExcelAppData.Disconnect;
  cds.EnableControls;
end;