未将对象引用设置到对象的实例

  private int ExecPost()
        {
            string strsql = "select t.endtime from dbo.user_message u inner join dbo.tb_Terminal t on u.vip_id = t.vip_id where u.m_state='未回复'";
                DataTable dtEndtime = getData(strsql);
                int number = 0;
                foreach (DataRow dr in dtEndtime.Rows)
                {
                    DateTime endtime = DateTime.Parse(dr["endtime"].ToString());
                    if (endtime < DateTime.Now)
                    {
                        continue;
                    }
                    SmsWorkshop sms = new SmsWorkshop();
                    string sql = "select * from user_message where m_state = '未回复'";
                    DataTable dt = getData(sql);
                    if (dt != null)
                    {
                        foreach (DataRow row in dt.Rows)
                        {
                            if (row["isWeilan"].ToString() == "1")
                            {
                                //围栏回复
                                string mob = getTopMobileByVipid(1, row["vip_id"]).ToString();
                                if (mob == "0")
                                {
                                    WriteDataLog("围栏:没有填写手机号码，发送失败!原内容为:" + row["m_content"].ToString());
                                    UpdatePostState(row);
                                }
                                else
                                {
                                    if (sms.PostMsg(mob, row["m_content"].ToString()))
                                    {
                                        WriteDataLog("围栏:已发送围栏回复成功!Mobile:" + mob);
                                        if (UpdatePostState(row))
                                        {
                                            number = dt.Rows.Count;
                                            WriteDataLog("围栏:更新围栏数据成功!Mobile:" + mob);
                                        }
                                        WriteDataLog("围栏:已发送围栏回复成功!Mobile:" + mob);
                                    }
                                    else
                                    {
                                        WriteDataLog("围栏:已发送围栏回复失败!Mobile:" + mob);
                                    }                                }                            }
                            else if (row["isWeilan"].ToString() == "2")
                            {
                                //断电回复
                                string mob = getTopMobileByTerid(1, row["ter_id"].ToString()).ToString();
                                if (mob == "0")
                                {
                                    WriteDataLog("断电:没有填写手机号码，发送失败!原内容为:" + row["m_content"].ToString());
                                    UpdatePostState(row);
                                }
                                else
                                {
                                    if (sms.PostMsg(mob, row["m_content"].ToString()))
                                    {
                                        WriteDataLog("断电:已发送断电回复成功!Mobile:" + mob);
                                        if (UpdatePostState(row))
                                        {
                                            number = dt.Rows.Count;
                                            WriteDataLog("断电:更新断电数据成功!Mobile:" + mob);
                                        }
                                        WriteDataLog("断电:已发送断电回复成功!Mobile:" + mob);
                                    }
                                    else
                                    {
                                        WriteDataLog("断电:已发送断电回复失败!Mobile:" + mob);
                                    }                                }
                            }
                            else if (row["isWeilan"].ToString() == "0")
                            {
                                //普通短信
                                string lon, lat, sta, spe, dir, gpstime;
                                ClassSms cSms = new ClassSms();
                                cSms.message = row["m_content"].ToString();
                                cSms.mobi = long.Parse(row["m_mobile"].ToString());
                                string add = cutAddress(getAddress(cSms, out lon, out lat, out sta, out spe, out dir, out gpstime));                                string postMsg = "";
                                if (sta == "" && spe == "" && lon == "" && lat == "")
                                {
                                    postMsg = add;
                                }
                                else
                                {
                                    //postMsg = cSms.message + " 状态:" + sta + ",速度:" + spe + "km/h,经纬度:" + CutThree(lon) + "," + CutThree(lat) + ",位置:" + add;
                                    string threeSpe = ",速度:" + spe + "km/h";
                                    string twoSta = sta.Substring(0, 2);
                                    if (twoSta == "离线" || twoSta == "暂停" || twoSta == "停驶") threeSpe = "";
                                    postMsg = cSms.message + " 状态:" + sta + threeSpe + ",位置:" + add;// +",定位时间:" + gpstime;  ",方向:" + dir +                                }
                                if (sms.PostMsg(row["m_mobile"].ToString(), postMsg))
                                {
                                    Console.WriteLine("已发送回复成功!Mobile:" + row["m_mobile"].ToString());
                                    WriteDataLog("已发送回复成功!Mobile:" + row["m_mobile"].ToString());
                                    if (UpdatePostState(row))
                                    {
                                        number = dt.Rows.Count;
                                        Console.WriteLine("更新数据成功!Mobile:" + row["m_mobile"].ToString());
                                        WriteDataLog("更新数据成功!Mobile:" + row["m_mobile"].ToString());
                                    }                                }
                                else
                                {
                                    Console.WriteLine("发送回复失败!Mobile:" + row["m_mobile"].ToString());
                                    WriteDataLog("发送回复失败!Mobile:" + row["m_mobile"].ToString());
                                }
                            }
                            else if (row["isWeilan"].ToString() == "10")
                            {
                                string cswtel = row["m_mobile"].ToString();
                                string cswmessage = row["m_content"].ToString();
                                if (sms.PostMsg(cswtel, cswmessage))
                                {
                                    WriteDataLog("发送短信异常正常信息给csw成功,号码:" + row["m_mobile"].ToString());
                                    if (UpdatePostState(row))
                                    {
                                        number = dt.Rows.Count;
                                        Console.WriteLine("更新csw信息数据成功!Mobile:" + row["m_mobile"].ToString());
                                        WriteDataLog("更新csw信息数据成功!Mobile:" + row["m_mobile"].ToString());
                                    }
                                }
                                else
                                {
                                    WriteDataLog("发送短信异常正常信息给csw失败,号码:" + row["m_mobile"].ToString());
                                }
                            }                        }
                    }
                }
            return number;
        }
黑色字体的时候是正常的程序，但是当我加入了红色字体后，程序还是能用，就是在日志中会出现，未将对象引用设置到对象的实例，请问这是哪里有问题啊？