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 程式師世界 >> 編程語言 >> 更多編程語言 >> Delphi >> 如何將幾個DBGRID裡的內容導入同一個EXCEL表中....的問題

如何將幾個DBGRID裡的內容導入同一個EXCEL表中....的問題

編輯:Delphi
 

  http://dev.csdn.net/article/53/53442.shtm
  如何將幾個DBGRID裡的內容導入同一個EXCEL表中?
  在軟件實際制作中,為節省開發成本和開發周期,一些軟件人員通常會吧DBGrid中的數據直接導出到Excel表中,而先前能看到的函數僅僅只能在WorkBook的一個Sheet中導入數據,不支持多Sheet!。

  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  

  單元應用:
  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;
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  經過測試,上面這段代碼確實有問題:(有興趣的朋友可以自己測試一下)

  比如:
  先form1.CopyDbDataToExcel([dbgrid1,dbgrid2,dbgrid3]);//OK
  再form1.CopyDbDataToExcel([dbgrid1,dbgrid2,dbgrid,dbgrid4]);//這樣就出錯,提示:無效索引

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

  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  總之:先少後多,就出錯...
  原因就出在上面代碼(1),(2)兩段上,經過測試,正確的應該將(1),(2)代碼對調,才能保證不出錯....
  


 
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