为什么在load的时候在mysql里面插入数据错误呢？

Question

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            #region 根据条件显示验证码
            if (Request.Cookies["Lang"] == null || Request.Cookies["Lang"].Value == "")
            {
                foreach (ListItem li in DropDownList.Items)
                {
                    if (li.Value == "")
                        Lang = "zh-cn";//给个默认的
                }
            }
            else
            {
                foreach (ListItem li in DropDownList.Items)
                {
                    if (li.Value.ToLower() == Request.Cookies["Lang"].Value)
                        li.Selected = true;
                }
            }
            if ((Session["pwdErrorCount"] != null) && (Session["pwdErrorCount"].ToString() != ""))
            {
                int PassErroeCount = Convert.ToInt32(Session["pwdErrorCount"]);
                if (PassErroeCount >= 3)
                {
                    this.UpdatePanel2.Visible = true;
                }
                else
                {
                    this.UpdatePanel2.Visible = false;
                }
            }
            else
            {
                this.UpdatePanel2.Visible = false;
            }
            #endregion
            #region 如果获取到的Cookie账号和密码没有错误，就直接进入后台
            if (Request.Cookies["VSLoginUsername"] != null && Request.Cookies["VSLoginPassword"] != null && Request.Cookies["VSLoginUsername"].Value != "" && Request.Cookies["VSLoginPassword"].Value != "")
            {
                wxh.BLL.UsersBLL bllUser = new wxh.BLL.UsersBLL();
                string username = Request.Cookies["VSLoginUsername"].Value;
                string password = wxh.Common.Simple.Decrypt(Request.Cookies["VSLoginPassword"].Value, 12345);
                wxh.Model.UsersInfo mod = bllUser.GetModel(username);
                if (mod.pwd.Equals(wxh.Common.MD5.Encrypt(password, 32)))
                {
                    Response.Redirect("Main/Main.aspx");
                }
                else
                {
                    if (Request.Cookies["Lang"].Value.ToLower() == "zh-cn")
                    {
                        this.Page.ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert('Cookie记录账号有误！');</script>");
                    }
                    if (Request.Cookies["Lang"].Value.ToLower() == "zh-tw")
                    {
                        this.Page.ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert('Cookie記錄賬號有誤！');</script>");
                    }
                }
            }
            #endregion
            //显示第三方登录图标
            litOtherLoginInfo.Text = OAuth2.UI.GetHtml();
        }
        //获取当前的授权类型，如果成功，则会缓存到Session中。
        OAuth2.OAuth2Base ob = OAuth2.OAuth2Factory.Current;
        //说明用户点击了授权，并跳回登陆界面来
        if (ob != null)
        {
            string account = string.Empty;
            //检测是否授权成功
            if (ob.Authorize(out account))
            {
                Session["token"] = ob.token;//这里保存的是token的值;
                Session["openid"]= ob.openID;//这里是保存的是用户的Openid;
                Session["niname"]= ob.nickName;//这里保存的是用户昵称;
                //Response.Write("<script language=javascript>alert('" + token + "+" + openid + "+"+ niname +"+"+ head +"+"+ time +"');</script>");
                #region 测试版
                //this.Page.ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert('123123！');</script>");
                if (Session["token"] != null || Session["openid"] != null || Session["niname"] != null)
                {
                    Response.Write("<script language=javascript>alert('" + Session["openid"] + "+" + Session["token"] + "+" + Session["niname"] + "');</script>");
                    #region 直接把从腾讯获取的到的信息存到数据中
                    wxh.Model.oauthinfo mod = new oauthinfo();
                    wxh.BLL.oauthBLL bll = new oauthBLL();
                    mod.OpenID = Session["openid"].ToString();
                    mod.Token = Session["token"].ToString();
                    mod.NickName = Session["niname"].ToString();
                    bll.Add(mod);
                    Response.Redirect("Resite.aspx");
                    //Session["OAuth2"] = openid;//把OPenid存到session里面 
                    #endregion
                    #region 无用代码，全注释掉了。
                    //Response.Write("<script language=javascript>alert('" + token + "+" + openid + "+"+ niname +"+"+ head +"+"+ time +"');</script>");
                    //Response.Write("<script language=javascript>alert('" + mod.OpenID + "+" + mod.Token + "+" + mod.NickName + "+" + mod.HeadUrl + "+" + mod.ExpireTime + "');</script>");
                    #region 插入登录日志
                    //wxh.BLL.Log1BLL blllog = new Log1BLL();
                    //wxh.Model.Log1Info modlog = new Log1Info();
                    //modlog.name =openid;//记录登陆的OAuth2;
                    //modlog.dt = DateTime.Now;
                    //modlog.eventid = 1;//当前事件 
                    #endregion
                    #region 插入新闻
                    wxh.BLL.NewsBLL bllnews = new wxh.BLL.NewsBLL();
                    wxh.Model.NewsInfo modnews = new wxh.Model.NewsInfo();//账号第一次申请的时候添加该信息
                    modnews.News_Type = "信息";
                    modnews.PostDate = DateTime.Now;
                    modnews.User_name = Session["openid"].ToString();
                    modnews.china_Newstitle = "视频监控系统";
                    modnews.china_Newscontent = Session["openid"] + ",欢迎您使用本系统，祝您生活愉快！";
                    modnews.usa_Newstitle = "Video surveillance system";
                    modnews.usa_Newscontent = ob.openID + ",You are welcome to use this system, I wish you a happy life!";
                    modnews.isRead = "false";
                    #endregion
                    //Response.Write("<script language=javascript>alert('已经执行到了插入数据之前拉!');</script>");
                    //return;
                    //执行数据操作,插入到oauth表                    //this.Page.ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert('插入到oauth表出错拉！');</script>");
                    //添加新闻
                    //bllnews.Add(modnews);
                    //this.Page.ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert('插入到news表出错拉！');</script>");
                    //添加日志记录
                    //blllog.Add(modlog);
                    //this.Page.ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert('插入到log表出错拉！');</script>");
                    //不管有木有绑定，都跳转到Main.aspx页面，和正常用户一样 
                    #endregion
                }
                #endregion
            }
        }
        //读取授权失败。
        else
        {
            //提示用户重试，或改用其它社区方法登陆。
        }
    }OAuth第三方登录MYsql