001-ADO.NET

Web.config

   <connectionStrings>
     <add name="connStr" connectionString="server=.;database=MyWeb;uid=sa;pwd=123"/>
   </connectionStrings>

SqlHelper.cs

     /// <summary>
     /// SqlHelper(数据库帮助类)
     /// </summary>
     public static class SqlHelper
     {
         /// <summary>
         /// SQL连接字符串
         /// </summary>
         private static string connStr = System.Configuration.ConfigurationManager.ConnectionStrings["connStr"].ConnectionString;
         /// <summary>
         /// 获取数据库列表数据
         /// </summary>
         /// <param name="sql">SQL语句</param>
         /// <param name="ps">SQL参数</param>
         /// <returns>返回DataTable</returns>
         public static DataTable GetList(string sql, params SqlParameter[] ps)
         {
             //创建Sql连接对象(参数:连接字符串)
             using (SqlConnection conn = new SqlConnection(connStr))
             {
                 //填充DataSet和更新SQL Server数据库(一组数据命令,一个数据库连接)
                 SqlDataAdapter sda = new SqlDataAdapter(sql, conn);
                 //设置存储过程,在数据源中选择记录
                 sda.SelectCommand.Parameters.AddRange(ps);
                 //表示内存中数据的一个表
                 DataTable dt = new DataTable();
                 //添加或刷新指定范围中的行DataSet,以匹配中使用数据源的那些DataTable名称
                 sda.Fill(dt);
                 //返回表数据
                 return dt;
             }
         }
         /// <summary>
         /// 执行SQL查询,并返回受影响的行数
         /// </summary>
         /// <param name="sql">SQL语句</param>
         /// <param name="ps">SQL参数</param>
         /// <returns>返回受影响的行数</returns>
         public static int ExecuteNonQuery(string sql, params SqlParameter[] ps)
         {
             //创建Sql连接对象(参数:连接字符串)
             using (SqlConnection conn = new SqlConnection(connStr))
             {
                 //表示对SQL Server数据库执行Sql语句或存储过程
                 SqlCommand cmd = new SqlCommand(sql, conn);
                 //对命令传入参数
                 cmd.Parameters.AddRange(ps);
                 //打开数据库连接
                 conn.Open();
                 //执行Sql语句,返回受影响的行数
                 return cmd.ExecuteNonQuery();
             }
         }
         /// <summary>
         /// 执行查询,返回结果集中第一行的第一列
         /// </summary>
         /// <param name="sql">SQL语句</param>
         /// <param name="ps">SQL参数</param>
         /// <returns>返回结果集第一行的第一列</returns>
         public static object ExecuteScalar(string sql, params SqlParameter[] ps)
         {
             //创建Sql连接对象(参数:连接字符串)
             using (SqlConnection conn = new SqlConnection(connStr))
             {
                 //对SQL Server数据库执行Sql语句
                 SqlCommand cmd = new SqlCommand(sql, conn);
                 //传入命令参数
                 cmd.Parameters.AddRange(ps);
                 //打开数据库
                 conn.Open();
                 //返回结果集第一行的第一列
                 return cmd.ExecuteScalar();
             }
         }
     }

CantusDal.cs

     /// <summary>
     /// Lrc歌词数据层
     /// </summary>
     public class CantusDal : ICantusDal
     {
         /// <summary>
         /// 获取数据库列表数据.Dal
         /// </summary>
         /// <returns></returns>
         public List<Cantus> GetList()
         {
             //sql查询语句
             string sql = "select * from cantus";
             //创建内存数据库表,接收查询到的数据
             DataTable dt = SqlHelper.GetList(sql);
             //创建List<Cantus>泛型集合
             List<Cantus> list = new List<Cantus>();
             //循环遍历(DataTable每一行数据)
             foreach (DataRow row in dt.Rows)
             {
                 //list集合添加数据单元
                 list.Add(new Cantus()
                 {
                     Id = Convert.ToInt32(row["Id"]),//Id(id)
                     Serial = Convert.ToByte(row["Serial"]),//Serial(曲目)
                     Song = row["Song"].ToString(),//Song(歌词)
                     Album = row["Album"].ToString(),//Album(专辑)
                     Number = (short)row["Number"],//Number(张数)
                     Date = Convert.ToDateTime(row["Date"]),//Date(年份)
                     Writer = row["Writer"].ToString(),//Writer(作词)
                     Composer = row["Composer"].ToString(),//Composer(作曲)
                     Arranger = row["Arranger"].ToString(),//Arranger(编曲)
                     Singing = row["Singing"].ToString(),//Singing(原唱)
                     Lyric = row["Lyric"].ToString()//Lyric(歌词)
                 });
             }
             return list;
         }
         /// <summary>
         /// 添加数据
         /// </summary>
         /// <returns></returns>
         public bool Add(Cantus ct)
         {
             string sql = "insert into cantus values(@Serial,@Song,@Album,@Number,@Date,@Writer,@Composer,@Arranger,@Singing,@Lyric)";
             SqlParameter[] ps = {
                 new SqlParameter("@Serial",ct.Serial),
                 new SqlParameter("@Song",ct.Song),
                 new SqlParameter("@Album",ct.Album),
                 new SqlParameter("@Number",ct.Number),
                 new SqlParameter("@Date",ct.Date),
                 new SqlParameter("@Writer",ct.Writer),
                 new SqlParameter("@Composer",ct.Composer),
                 new SqlParameter("@Arranger",ct.Arranger),
                 new SqlParameter("@Singing",ct.Singing),
                 new SqlParameter("@Lyric",ct.Lyric),
             };
             return SqlHelper.ExecuteNonQuery(sql, ps) > ;
         }
     }

CantusBll.cs

     /// <summary>
     /// 业务逻辑层.BLL
     /// </summary>
     public class CantusBll : ICantusBll
     {
         /// <summary>
         /// 声明Dal操作对象
         /// </summary>
         private CantusDal ctDal;
         /// <summary>
         /// 构造函数()
         /// </summary>
         public CantusBll()
         {
             //创建Dal操作对象
             ctDal = new CantusDal();
         }
         /// <summary>
         /// 返回数据层获取的数据
         /// </summary>
         /// <returns></returns>
         public List<Cantus> GetList()
         {
             return ctDal.GetList();
         }
         /// <summary>
         /// 添加数据
         /// </summary>
         /// <param name="ct"></param>
         /// <returns></returns>
         public bool Add(Cantus ct)
         {
             return ctDal.Add(ct);
         }
     }

BackController.cs

     public class BackController : Controller
     {
         CantusBll ctBll = new CantusBll();
         // GET: Back
         public ActionResult Index()
         {
             List<Cantus> ct = ctBll.GetList();
             JavaScriptSerializer js = new JavaScriptSerializer();
             string result = js.Serialize(ct);
             Response.Write(result);
             return View();
         }
     }