/// <summary>
        /// 注册
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void btnRegister_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrWhiteSpace(txtUserName.Text))
            {
                Response.Write("<script>alert('请输入用户名')</script>");
                return;
            }
            if (string.IsNullOrWhiteSpace(txtUserPwd.Value))
            {
                Response.Write("<script>alert('请输入密码')</script>");
                return;
            }

            int id = SimpleSqlserverHelper.ExecuteNonQuery("Insert into Users (UserName,UserPwd)Values('" + txtUserName.Text + "','" + txtUserPwd.Value + "')");

            if (id > 0)
            {
                Response.Write("<script>alert('注册成功')</script>");
                Response.Redirect("Default.aspx");
            }
            else
            {
                Response.Write("<script>alert('注册失败')</script>");
            }
        }
        //绑定
        public void dataBinds()
        {
            string sql = "select * from TempHumData ";

            DataSet ds = SimpleSqlserverHelper.ExecuteDataset(sql);

            if (ds != null)
            {
                gvwUsers.DataSource   = ds.Tables[0];
                gvwUsers.DataKeyNames = new string[] { "Id" };//主键
                gvwUsers.DataBind();
            }
        }
        /// <summary>
        /// 登录
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void btnLogin_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrWhiteSpace(txtUserName.Text))
            {
                Response.Write("<script>alert('请输入用户名')</script>");
                return;
            }
            if (string.IsNullOrWhiteSpace(txtpwd.Value))
            {
                Response.Write("<script>alert('请输入密码')</script>");
                return;
            }

            //sql查询语句
            string sql = "select UserId from Users where UserName=@username and UserPwd=@userpwd";

            //设置参数
            SqlParameter[] paras = new SqlParameter[]
            {
                //记录数据ID
                new SqlParameter("@username", SqlDbType.NVarChar, 50),
                new SqlParameter("@userpwd", SqlDbType.NVarChar, 50)
            };

            paras[0].Value = txtUserName.Text;
            paras[1].Value = txtpwd.Value;

            DataSet ds = SimpleSqlserverHelper.ExecuteDataset(sql, paras);

            if (ds != null && ds.Tables[0] != null && ds.Tables[0].Rows.Count > 0)
            {
                Response.Write("<script>alert('登录成功')</script>");
                Response.Redirect("ListShow.aspx");
            }
            else
            {
                Response.Write("<script>alert('登录失败')</script>");
            }
        }
        /// <summary>
        /// 取消
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        //protected void gvwUsers_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
        //{
        //    gvwUsers.EditIndex = -1;
        //    dataBinds();
        //}

        /// <summary>
        ///删除
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void gvwUsers_RowDeleting(object sender, GridViewDeleteEventArgs e)
        {
            sqlWhere = "delete from TempHumData  where Id='" + gvwUsers.DataKeys[e.RowIndex].Value.ToString() + "'";
            SimpleSqlserverHelper.ExecuteNonQuery(sqlWhere);
            dataBinds();
        }