用c#编写了一个登陆界面，
登陆后跳转到报表界面，
登陆时通过session["branch_no"]将登陆获取的机构值传递到报表界面
通过下面的语法链接看报表
<A href=http://......3aCommand=Render&branch_no="+Session["branch_no"]  target="ShowCon">
进入报表后，发现Session["branch_no"]  的值没有传给变量branch_no
求高手指点指点怎么去传参数

private ReportDocument Rodc = new ReportDocument();
        string path = Server.MapPath("../RptSources/warehouse_product_total.rpt");
        Rodc.Load(path);  

            if (!string.IsNullOrEmpty(report_code)) Common.SetRptText(Rodc, "Txt_reportcode", "报表编号:" + report_code);
        /// <summary>
        /// 设置报表内Text的值
        /// </summary>
        /// <param name="rptdoc"></param>
        /// <param name="controlid"></param>
        /// <param name="value"></param>
        public static void SetRptText(ReportDocument rptdoc, string controlid, string value)
        {
            try
            {
                TextObject rptvalue = (TextObject)rptdoc.ReportDefinition.ReportObjects[controlid];
                rptvalue.Text = value;
            }
            catch
            {
                throw;
            }
        }

lz 没有理解session是什么，建议网上看看什么是session