三层架构+防SQL注入——插入

 SQLHELP类

 

 /// <summary>
        ///  执行带参数的增删改SQL语句或存储过程
        /// </summary>
        /// <param name="cmdText">增删改SQL语句或存储过程</param>
        /// <param name="ct">命令类型</param>
        /// <returns></returns>
        public int ExecuteNonQuery(string cmdText, SqlParameter[] paras, CommandType ct)
        {
            int res;
            using (cmd = new SqlCommand(cmdText, GetConn()))
            {
                cmd.CommandType = ct;
                cmd.Parameters.AddRange(paras);
                res = cmd.ExecuteNonQuery();
            }
            return res;
        }

DAL层

 public bool Insert(Comment c)
        {
            bool flag = false;
            string sql = "insert into comment([content],userIp, newsId) values(@content,@userIp,@newsId)";
            SqlParameter[] paras = new SqlParameter[] { 
            new SqlParameter("@content", c.Content),
            new SqlParameter("@userIp", c.UserIp),
            new SqlParameter("@newsId", c.NewsId)
           };
            int res = sqlhelper.ExecuteNonQuery(sql, paras, CommandType.Text);
            if (res > 0)
            {
                flag = true;
            }
            return flag;
        }

 

BLL层

 

增加新闻#region 增加新闻
        /**//// <summary>
        ///  增加新闻
        /// </summary>
        /// <param name="n">新闻实体现</param>
        /// <returns></returns>
        public bool Insert(News n)
        {
            return ndao.Insert(n);
        }
        #endregion

 

WEB层

 

//添加新闻按钮
    protected void btnAdd_Click(object sender, EventArgs e)
    {
        string title = txtTitle.Text.Trim();
        string content = ftbContent.Text.Trim();
        string caid = ddlCategory.SelectedValue;

        News n = new News(title, content, caid);

        bool b = new NewsManager().Insert(n);

        if (b)
        {
            Page.ClientScript.RegisterStartupScript(Page.GetType(), "message", "<script language='javascript' defer>alert('新闻添加成功！');</script>");
        }
        else
        {
            Page.ClientScript.RegisterStartupScript(Page.GetType(), "message", "<script language='javascript' defer>alert('新闻添加失败，请联系管理员！');</script>");
        }

        // 清空标题和内容
        txtTitle.Text = "";
        ftbContent.Text = "";
    }

 

MODEL层—实体层

 

namespace Model
{
    /// <summary>
    /// 新闻实体类
    /// </summary>
    public class News
    {
        private string id;
        /// <summary>
        /// 主键，自增
        /// </summary>
        public string Id
        {
            get { return id; }
            set { id = value; }
        }

        private string title;
        /// <summary>
        /// 新闻标题
        /// </summary>
        public string Title
        {
            get { return title; }
            set { title = value; }
        }

        private string content;
        /// <summary>
        /// 新闻内容
        /// </summary>
        public string Content
        {
            get { return content; }
            set { content = value; }
        }

        private string createTime;
        /// <summary>
        /// 新闻发表时间
        /// </summary>
        public string CreateTime
        {
            get { return createTime; }
            set { createTime = value; }
        }

        private string caId;
        /// <summary>
        /// 新闻所属类别ID
        /// </summary>
        public string CaId
        {
            get { return caId; }
            set { caId = value; }
        }

        public News() { }

        public News(string title, string content, string caid)
        {
            this.title = title;
            this.content = content;
            this.caId = caid;
        }

        public News(string id, string title, string content, string caid)
        {
            this.id = id;
            this.title = title;
            this.content = content;
            this.caId = caid;
        }
    }
}

 引 牛腩新闻发布系统