关于checkbox多选一起提交问题！！！

在开发的过程中我们常常会用到checkbox 有可能会连续点击两个进行提交，通常我们的做法是一条一条的提交，这样来回操作数据库，时间会很长，我们可以放到一起提交上去。

// 红色字体部分就是如何提交的写法。。。。
  protected void btnbc_Click(object sender, EventArgs e)
    {
        string dh = ddlpddh.SelectedValue.ToString();
        string sql2 = string.Empty;
        System.Data.DataTable dt = dbgr.GetDataTable(sql);


        StringBuilder sb = new StringBuilder();//插入 开始。。。。先定义一个StringBuilder
        StringBuilder de = new StringBuilder();//删除 开始
        sb.Append("begin ");
        de.Append("begin ");


        for (int i = 0; i < GridView1.Rows.Count; i++)
        {
            tbyy = (System.Web.UI.WebControls.TextBox)this.GridView1.Rows[i].FindControl("tbyy");
            if (tbyy.Text.ToString() != "")
            {  
                string rwdh = dt.Rows[i]["rwdh"].ToString();
                string jlsj = dt.Rows[i]["jlsj"].ToString();
                string dw = ViewState["dw"].ToString();
                string zcbm = dt.Rows[i]["zcbm"].ToString();
                string zcmc = dt.Rows[i]["zcmc"].ToString();
                string ggxh = dt.Rows[i]["ggxh"].ToString();
                string jldw = dt.Rows[i]["jldw"].ToString();
                string fhsl = dt.Rows[i]["fhsl"].ToString();
                string zzcj = dt.Rows[i]["zzcj"].ToString();
                string tcrq = dt.Rows[i]["tcrq"].ToString();
                string cph = dt.Rows[i]["cpjh"].ToString();
                string zydw = dt.Rows[i]["dwmc"].ToString();
                string yz = dt.Rows[i]["yz"].ToString();
                string jz = dt.Rows[i]["jz"].ToString();
                var li = ViewState["li"] as List<string>;//取LI中的值
                for (int j = 0; j <li.Count; j++)//这个语句判断ZCBM是否插入进去过，如果有 就不在插入语句。
                {
                    if (zcbm==li [j])
                    {
                        sql2 = "update zc_pdsj_hs set hsrq='" + tbyy.Text.ToString() + "' where zcbm='" + zcbm + "';";
                    }
                    else
                    {
                        sql2 = "insert into zc_pdsj_hs(rwdh,rq,DW,zcbm,zcmc,ggxh,jldw,fhsl,zzcj,tcrq,cpjh,zydw,yz,jz,HSRQ,dwbm)values('{0}','{1}','{2}','{3}','{4}','{5}','{6}','{7}','{8}','{9}','{10}','{11}','{12}','{13}','{14}','{15}'); ";
                        sql2 = string.Format(sql2, rwdh, jlsj, dw, zcbm, zcmc, ggxh, jldw, fhsl, zzcj, tcrq, cph, zydw, yz, jz, tbyy.Text.ToString(), ViewState["dwbm"].ToString());
               
                    }
                }
                
               sb.Append(sql2);//把语句放到刚才定义的sb中

                string del = "delete from zc_pdsj where rwdh = '" + rwdh + "'and zcbm='" + zcbm + "';";
                de.Append(del);

            }
            else
            {
                //页面无刷新弹框
                Page.RegisterStartupScript("", "<script>alert('请输入毁损时间！')</script>");


                return;
            }
            try
            {
                sb.Append("end;");//插入结束
                de.Append("end;");//删除结束
                this.dbgr.ExecSQL(sb.ToString());//数据库连接字符串。。。。。所有循环结束，并执行相应的操作。
                this.dbgr.ExecSQL(de.ToString());
                Response.Write("<script language=javascript>alert('提交成功！'); location='PKMX.aspx'</script>");


            }
            catch (Exception ex)
            {
                Response.Write("<script language=javascript>alert('出现 " + ex + " 错误'); </script>");

            }

        }
    }