ASP.NET展开GridView行数据展示效果，巧用UpdatePanel实现

protected void gvDemand_RowCommand(object sender, GridViewCommandEventArgs e)
        {
            string rowIndex = e.CommandArgument.ToString();
            switch (e.CommandName.ToLower())
            {
                case "showdetail": //显示详细信息
                    int index = 0;
                    if (int.Parse(rowIndex) % pager.PageSize == 0)
                    { index = pager.PageSize - 1; }
                    else
                    { index = (int.Parse(rowIndex) % pager.PageSize) - 1; }
                    HtmlTableRow trShowDetail = (HtmlTableRow)gvDemand.Rows[index].FindControl("trShowDetail");
                    if (trShowDetail != null)
                    {
                        if (trShowDetail.Visible == false)
                        {
                            trShowDetail.Visible = true;
                            //流程控件处理
                            WorkFlow.UserControl.ActionToolBar flowBar = ((WorkFlow.UserControl.ActionToolBar)gvDemand.Rows[index].FindControl("ActionToolBar1"));
                            if (flowBar != null)
                            {
                                flowBar.BindFlowData();
                            }
                        }
                        else
                        {
                            trShowDetail.Visible = false;
                        }
                    }
                    break;
                default:
                    break;
            }
}