TDBGridEh导出Excel。

    j:=RzPageControl1.ActivePageIndex;
   for i:=0 to RzPageControl1.Pages[j ].ControlCount-1 do
    if (RzPageControl1.Pages[j].Controls[i] is TGroupBox)then
     begin
       for k:=0 to (RzPageControl1.Pages[j].Controls[i] as TGroupBox).ControlCount-1  do
          if ((RzPageControl1.Pages[j].Controls[i] as TGroupBox).Controls[k] is TDBGridEh)then
            Excel:=(((RzPageControl1.Pages[j].Controls[i] as TGroupBox).Controls[k] as TDBGridEh).Name);

     end;

获得当前窗体的TDBGridEh，
然后看了些资料。TDBGridEh 导出Excel

 if saveDialog1.Execute then
    begin
     SaveDBGridEhToExportFile(TDBGridEhExportAsXLS,Excel,savedialog1.filename+'.xls',true);
     showmessage('成功导出到'+ savedialog1.filename+'.xls');
    end;

这里的Excel 类型不同。如何转换？或者我弄错了？，正确方法是什么？

[解决办法]
当然类型不同啦，你赋值都用错了
你的代码要作以下修改就可以了：
定义
var Excel:TDBGridEH;//估计这里你用了 Var Excel：string;
赋值
Excel:=((RzPageControl1.Pages[j].Controls[i] as TGroupBox).Controls[k] as TDBGridEh);