如何将数据集内容导出为Excel文件？

Question

如何将数据集内容导出为Excel文件？
Dataset已经打开，如何将其中记录、字段导出为Excel文件？

Answer 1

procedure TForm3.Excel4Click(Sender: TObject);   //将联合查询的结构转为excel表
var       xlsFilename :string;
          eclApp,WorkBook :variant ;
          a_filedNo,i,j :integer;
begin
          a_filedNo :=Form3.DBGrid4.FieldCount  ;
          xlsFileName :='关于学生成绩基本信息.xls';          try
                  eclApp :=CreateOleObject('Excel.Application');
                  WorkBook :=CreateOleObject('Excel.Sheet');
          except
                  showmessage('您的系统没有安装MS EXCEL');
                  exit;
          end;          try
                    WorkBook :=eclApp.workBooks.add ;
                    for i :=1 to  a_FiledNo do      //转化字段名；
                     begin
                            //eclApp.cells(1,i) :=Form3.DBGrid4.Columns[i-1].Title.caption ;
                            eclApp.cells(1,i) :=Form3.DBGrid4.Fields[i-1].FieldName ;
                     end;                    Form3.DBGrid4.DataSource.DataSet.First ;
                    for i :=1 to  Form3.a_recno   do    //Form3.a_recno                       begin
                            for j :=1 to  a_filedNo do  //转化一个记录
                              begin
                                      eclApp.cells(i+1,j) :=Form3.DbGrid4.Fields[j-1].Value ;
                              end;
                            Form3.DBGrid4.DataSource.DataSet.Next ;
                      end;
                try
                     WorkBook.saveas(ExtractFilePath(Application.ExeName )+xlsFileName);
                     WorkBook.close;
                     showmessage('保存EXECL文件成功，路径为：'+ExtractFilePath(Application.ExeName )+xlsFileName);
                  except
                           showmessage('保存文件出错');
                  end;
               except
                 showmessage('不能正确操作EXECL文件，可能该文件已经被其他程序占用或系统错误');
                 WorkBook.close;
                 eclApp.quit;
                 eclApp :=Unassigned;
         end;
end;