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如何将几个DBGRID里的内容导入同一个EXCEL表中....的问题

 2006-02-04 14:01:20 来源:WEB开发网   
核心提示: http://dev.csdn.net/article/53/53442.shtm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,如何将几个DBGRID里的内容导入同一个EXCEL表中....的问题,一些软件人员通常会吧DBGrid中的数据直接导出到Excel表中,
 

http://dev.csdn.net/article/53/53442.shtm
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;

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;//  (1)
  XLApp.SheetsInNewWorkbook := High(Args) + 1;//  (2)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  XLApp.SheetsInNewWorkbook := High(Args) + 1;
  XLApp.WorkBooks.Add; 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  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;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
经过测试,上面这段代码确实有问题:(有兴趣的朋友可以自己测试一下)

比如:
先form1.CopyDbDataToExcel([dbgrid1,dbgrid2,dbgrid3]);//OK
再form1.CopyDbDataToExcel([dbgrid1,dbgrid2,dbgrid,dbgrid4]);//这样就出错,提示:无效索引

如果这样:
先form1.CopyDbDataToExcel([dbgrid1,dbgrid2,dbgrid3,dbgrid4]);//OK
再form1.CopyDbDataToExcel([dbgrid1,dbgrid2]);//OK

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
总之:先少后多,就出错...
原因就出在上面代码(1),(2)两段上,经过测试,正确的应该将(1),(2)代码对调,才能保证不出错....


Tags:如何 DBGRID

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