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DBGrid使用全书(四)

 2006-02-04 13:54:49 来源:WEB开发网   
核心提示: DbGrid控件的标题栏弹出菜单PRocedure TFrmOrderPost.DbgOrderPostMouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);var CurPost:TPoint;beg
 

DbGrid控件的标题栏弹出菜单
PRocedure TFrmOrderPost.DbgOrderPostMouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
var
  CurPost:TPoint;
begin
  GetCursorPos(CurPost);//获得鼠标当前坐标
  if (y<=17) and (x<=vCurRect.Right) then
  begin
   if button=mbright then
   begin
    PmTitle.Popup(CurPost.x,CurPost.y);
   end;
  end;
end;
//vCurRect该变量在DbGrid的DrawColumnCell事件中获得
{procedure TFrmOrderPost.DbgOrderPostDrawColumnCell(Sender: TObject;const Rect: TRect; DataCol: Integer; Column: TColumn; State: TGridDrawState);
begin
  vCurRect:=Rect;//vCurRect在实现部分定义
end;}
如何将几个DBGRID里的内容导入同一个Excel表中?
在软件实际制作中,为节省开发成本和开发周期,一些软件人员通常会吧DBGrid中的数据直接导出到Excel表中,而先前能看到的函数仅仅只能在WorkBook的一个Sheet中导入数据,不支持多Sheet!。

单元应用:

Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, DB, DBTables, Grids, DBGrids, ActiveX, ComObj,
Excel2000, OleServer;

测试环境:

OS:Win2k Pro;Excel2k;Delphi6.0

源程序:  

{
功能描述:把DBGrid输出到Excel表格(支持多Sheet)
设计:CoolSlob
日期:2002-10-23
支持:CoolSlob@163.com
调用格式:CopyDbDataToExcel([DBGrid1, DBGrid2]);
}

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;

 怎样在DbGrid的左边,实现像EXCEL那样的自动编号?这些编号与表无关
unit Unit1;

interface

uses
 Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
 Grids, DBGrids, StdCtrls, Buttons, Db, DBTables, ExtCtrls, jpeg;
const ROWCNT=20;

type
   tmygrid=class(tdbgrid)
   protected
    procedure Paint;override;
    procedure DrawCell(ACol:Integer;ARow:Integer;ARect:TRect;AState:TGridDrawState);override;
   public
    constructor create(AOwner:TComponent);override;
    destructor  destroy;override;
   end;

 TForm1 = class(TForm)
  BitBtn1: TBitBtn;
  DataSource1: TDataSource;
  Table1: TTable;
  procedure BitBtn1Click(Sender: TObject);
 private
  { Private declarations }
 public
  { Public declarations }
 end;

var
 Form1: TForm1;
 mygrid:tmygrid;
implementation

{$R *.DFM}

   {tmygrid}
   constructor tmygrid.create(AOwner:TComponent);
   begin
    inherited create(Owner);
    RowCount:=ROWCNT;
   end;

   destructor tmygrid.destroy;
   begin
    inherited;
   end;

   procedure tmygrid.Paint;
   begin
    RowCount:=ROWCNT;
    if dgIndicator in options then
     ColWidths[0]:=30;
    inherited;
   end;

   procedure tmygrid.DrawCell(ACol:Integer;ARow:Integer;ARect:TRect;AState:TGridDrawState);
   begin
    inherited;
    if (ARow>=1) and (ACol=0) then
     Canvas.TextRect(ARect,ARect.Left,ARect.Top,IntToSTr(ARow));
  end;

procedure TForm1.BitBtn1Click(Sender: TObject);
begin
 mygrid:=tmygrid.create(Self);
 mygrid.parent:=self;
 mygrid.left:=0;
 mygrid.top:=0;
 mygrid.Height:=300;
 mygrid.DataSource:=DataSource1;
end;

end.

Tags:DBGrid 使用 全书

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