我在一个界面中用到多个panel,默认是隐藏的.
在pageload的if (!IsPostBack)中我去读数据库,根据读出来的数据来设置各个panel的显示还是隐藏.

我用中断来查,发现能读出数据,也能设置panel的visible属性,
但奇怪的是,界面上显示的却一直是隐藏

以下是后台代码:

        if (!IsPostBack)
        {
            id = Request.Params["id"].ToString().Trim();
            ViewState["dqid"] = id;
            DateTime newDate = DateTime.Now;
            SqlConnection con = new SqlConnection(source);
            con.Open();
            string sql = null;
            SqlCommand cmd = new SqlCommand(sql, con);
            SqlDataReader reader = null;

            #region //读记录
            sql = "select * from cw_Pingzheng_main where id='" + (string)ViewState["dqid"] + "'";
            cmd.CommandText = sql;
            reader = cmd.ExecuteReader();
            if (reader.Read())
            {
                string pzdate = reader["pzdate"].ToString();
                DateTime dt = Convert.ToDateTime(pzdate);
                string y = dt.Year.ToString();
                string m = dt.Month.ToString();
                string d = dt.Day.ToString();
                txtriqi.Text = y + "-" + m + "-" + d;
                listzi.SelectedValue = reader["zi"].ToString();
                txthao.Text = reader["hao"].ToString();
                txtfujian.Text = reader["fujian"].ToString();
                txtmm.Text = reader["remark"].ToString();
                if (reader["edman"].ToString().Trim() == null || reader["edman"].ToString().Trim() == "" || reader["edman"].ToString().Trim() == string.Empty)
                {
                    Label_jizhang.Text = reader["crman"].ToString();
                }
                else
                {
                    Label_jizhang.Text = reader["edman"].ToString();
                }
            }
            else
            {
                //读记录失败
                Page.ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert('警告，读取凭证主表失败！');</script>");
                return;
            }
            reader.Close();

            SqlConnection con2 = new SqlConnection(source);
            con2.Open();
            string sql2 = null;
            SqlCommand cmd2 = new SqlCommand(sql2, con2);
            SqlDataReader reader2 = null;

            sql = "select * from cw_Pingzheng_detail where id='" + id + "' order by jie_amt desc";
            cmd.CommandText = sql;
            reader = cmd.ExecuteReader();
            string temp = "";
            TextBox tb = null;
            Label tc = null;
            Panel pl1 = null;
            Panel pl2 = null;
            Panel pl3 = null;
            DropDownList dd = null;
            string tempd = "";
            string tempa = "";
            string tempb = "";
            double tempc = 0;
            double ttj = 0;
            double ttd = 0;
            int i = 0;
            while (reader.Read())
            {
                //摘要
                temp = "txt_zhaiyao" + (i + 1).ToString().Trim();
                tb = (TextBox)this.Page.FindControl(temp);
                tb.Text = reader["zhaiyao"].ToString().Trim();


                //科目
                temp = "txtkemu" + (i + 1).ToString().Trim();
                tb = (TextBox)this.Page.FindControl(temp);

                //科目ID
                temp = "Laa" + (i + 1).ToString().Trim();
                tc = (Label)this.Page.FindControl(temp);
                tc.Text = reader["FaccountID"].ToString().Trim();
                tempd = tc.Text.ToString().Trim();

                sql2 = "select * from cw_GLAcct where FaccountID='" + tempd + "'";
                cmd2.CommandText = sql2;
                reader2 = cmd2.ExecuteReader();
                if (reader2.Read())
                {
                    tempa = reader2["Fnumber"].ToString().Trim();
                    tempb = reader2["Fname"].ToString().Trim();
                    tb.Text = tempa + " - - " + tempb;

                    //科目方向
                    temp = "Lab" + (i + 1).ToString().Trim();
                    tc = (Label)this.Page.FindControl(temp);
                    tempb = reader2["jiedai"].ToString().Trim();
                    if (tempb == "jie")
                    {
                        tc.Text = "借方科目";
                    }
                    else
                    {
                        tc.Text = "贷方科目";
                    }

                    //显示还是隐藏3个Panel
                    temp = "P" + (i + 1).ToString().Trim();
                    pl1 = (Panel)this.Page.FindControl(temp);
                    tempa = reader2["buhesuanwaibi"].ToString().Trim();
                    if (tempa== "False")
                    {
                        pl1.Visible = true;
                    }
                    else
                    {
                        pl1.Visible = false;
                    }
                    //
                    temp = "w" + (i + 1).ToString().Trim();
                    pl2 = (Panel)this.Page.FindControl(temp);
                    tempa = reader2["hesuansuoyouwaibi"].ToString().Trim();
                    if (tempa == "True")
                    {
                        pl2.Visible = true;
                    }
                    else
                    {
                        pl2.Visible = false;
                    }
                    //
                    temp = "J" + (i + 1).ToString().Trim();
                    pl3 = (Panel)this.Page.FindControl(temp);
                    tempa = reader2["jiesuanleikemu"].ToString().Trim();
                    if (tempa == "True")
                    {
                        pl3.Visible = true;
                    }
                    else
                    {
                        pl3.Visible = false;
                    }
                }
                reader2.Close();


                //借方金额
                temp = "txtkemu_jie_amt" + (i + 1).ToString().Trim();
                tb = (TextBox)this.Page.FindControl(temp);
                tempc = double.Parse(reader["jie_amt"].ToString().Trim());
                if (tempc == 0)
                {
                    tb.Text = "";
                }
                else
                {
                    tb.Text = tempc.ToString("0.00");
                    ttj = ttj + double.Parse(tb.Text.ToString());
                }
                //贷方金额
                temp = "txtkemu_dai_amt" + (i + 1).ToString().Trim();
                tb = (TextBox)this.Page.FindControl(temp);
                tempc = double.Parse(reader["dai_amt"].ToString().Trim());
                if (tempc == 0)
                {
                    tb.Text = "";
                }
                else
                {
                    tempc = double.Parse(reader["dai_amt"].ToString().Trim());
                    tb.Text = tempc.ToString("0.00");
                    ttd = ttd + double.Parse(tb.Text.ToString());
                }
                //外币
                temp = "txtwaibi_waibi" + (i + 1).ToString().Trim();
                tb = (TextBox)this.Page.FindControl(temp);
                tempa = reader["wb"].ToString().Trim();
                if (tempa != "RMB")
                {
                    P1.Visible = true;
                    tb.Text = tempa;
                }
                else
                {
                    P1.Visible = false;
                }

                //汇率
                temp = "txtwaibi_huilv" + (i + 1).ToString().Trim();
                tb = (TextBox)this.Page.FindControl(temp);
                tempc = double.Parse(reader["wb_huilv"].ToString().Trim());
                if (tempa != "RMB")
                {
                    tb.Text = tempc.ToString();
                }

                //外币金额
                temp = "txtwaibi_amt" + (i + 1).ToString().Trim();
                tb = (TextBox)this.Page.FindControl(temp);
                tempc = double.Parse(reader["wb_amt"].ToString().Trim());
                if (tempa != "RMB")
                {
                    tb.Text = tempc.ToString("0.00");
                }


                //结算方式
                temp = "list_jsfs" + (i + 1).ToString().Trim();
                dd = (DropDownList)this.Page.FindControl(temp);
                dd.SelectedValue = reader["js_fs"].ToString().Trim();


                //结算单号
                temp = "txt_jsh" + (i + 1).ToString().Trim();
                tb = (TextBox)this.Page.FindControl(temp);
                tb.Text = reader["js_no"].ToString().Trim();


                //结算日期
                temp = "txt_jsrq" + (i + 1).ToString().Trim();
                tb = (TextBox)this.Page.FindControl(temp);
                tb.Text = reader["js_date"].ToString().Trim();



                
                i++;
            }
            reader.Close();
            con.Close();
            con2.Close();

            total_jie_amt.Text = ttj.ToString().Trim();
            total_dai_amt.Text = ttd.ToString().Trim();

            #endregion //读记录