protected void FormView_worksheet_ItemCommand(object sender, FormViewCommandEventArgs e)
 {
     switch (e.CommandName)
     {
     case "Back":
         MultiView_worksheet.SetActiveView(viewGrid);
         GridView_worksheet.DataBind();
         break;
     }
 }
 protected void FormView_worksheet_ItemUpdated(object sender, FormViewUpdatedEventArgs e)
 {
     GridView_worksheet.DataBind();
     MultiView_worksheet.SetActiveView(viewGrid);
 }
 protected void Button_new_Click(object sender, EventArgs e)
 {
     MultiView_worksheet.SetActiveView(MultiView_worksheet.Views[1]);
     FormView_worksheet.ChangeMode(FormViewMode.Insert);
 }