强类型--验证用户登录次数

static int errorcount = 0;
        protected void Button1_Click(object sender, EventArgs e)
        {
            T_UserTableAdapter adapter = new T_UserTableAdapter();
            string name = this.TextBox1.Text;
            string pw=this.TextBox2.Text;
            WebApplication1.DataSet1.T_UserDataTable dt = adapter.GetDataByPw(name);
            int sqlerror = Convert.ToInt32( adapter.ScalarQuery(name));
            if (sqlerror >=3)
            {
                int secondspan = Convert.ToInt32(adapter.GetDataErrorTime(name));
                //如果间隔时间小于解锁时间则返回程序
                if (secondspan < 60)
                {
                    Response.Write("<script>alert(\"您已经连续3次输入错误的密码，已被系统锁定，请60秒之后再次重试，或者到服务窗口解锁\");</script>");
                }
                else
                {
                    adapter.UpdateErrorCount(0, name);
                }
               
                return;
            }

            if (dt[0].password != pw)
            {

                //累加一次错误
                errorcount++;
                adapter.UpdateErrortime(DateTime.Now, name);//更新登录错误的时间
                adapter.UpdateErrorCount(errorcount, name);//更新错误次数
                ClientScript.RegisterStartupScript(this.GetType(), "", "alert('用户名或密码不正确，请重新输入')", true);
              

            }
            else
            {
               
                adapter.UpdateErrorCount(0, name);
                ClientScript.RegisterStartupScript(this.GetType(), "", "alert('登录成功')", true);
            }
           
        }