/// <summary> /// 更新一条数据 /// </summary> public bool Update(cn.itcast.bookshop.Model.Cart model) { StringBuilder strSql = new StringBuilder(); strSql.Append("update Cart set "); strSql.Append("UserId=@UserId,"); strSql.Append("BookId=@BookId,"); strSql.Append("Count=@Count"); strSql.Append(" where Id=@Id"); SqlParameter[] parameters = { new SqlParameter("@UserId", SqlDbType.Int, 4), new SqlParameter("@BookId", SqlDbType.Int, 4), new SqlParameter("@Count", SqlDbType.Int, 4), new SqlParameter("@Id", SqlDbType.Int, 4) }; parameters[0].Value = model.UserId; parameters[1].Value = model.BookId; parameters[2].Value = model.Count; parameters[3].Value = model.Id; int rows = DbHelperSQL.ExecuteSql(strSql.ToString(), parameters); if (rows > 0) { return(true); } else { return(false); } }
/// <summary> /// 增加一条数据 /// </summary> public int Add(cn.itcast.bookshop.Model.Cart model) { StringBuilder strSql = new StringBuilder(); strSql.Append("insert into Cart("); strSql.Append("UserId,BookId,Count)"); strSql.Append(" values ("); strSql.Append("@UserId,@BookId,@Count)"); strSql.Append(";select @@IDENTITY"); SqlParameter[] parameters = { new SqlParameter("@UserId", SqlDbType.Int, 4), new SqlParameter("@BookId", SqlDbType.Int, 4), new SqlParameter("@Count", SqlDbType.Int, 4) }; parameters[0].Value = model.UserId; parameters[1].Value = model.BookId; parameters[2].Value = model.Count; object obj = DbHelperSQL.GetSingle(strSql.ToString(), parameters); if (obj == null) { return(0); } else { return(Convert.ToInt32(obj)); } }
/// <summary> /// 得到一个对象实体 /// </summary> public cn.itcast.bookshop.Model.Cart DataRowToModel(DataRow row) { cn.itcast.bookshop.Model.Cart model = new cn.itcast.bookshop.Model.Cart(); if (row != null) { if (row["Id"] != null && row["Id"].ToString() != "") { model.Id = int.Parse(row["Id"].ToString()); } if (row["UserId"] != null && row["UserId"].ToString() != "") { model.UserId = int.Parse(row["UserId"].ToString()); } if (row["BookId"] != null && row["BookId"].ToString() != "") { model.BookId = int.Parse(row["BookId"].ToString()); } if (row["Count"] != null && row["Count"].ToString() != "") { model.Count = int.Parse(row["Count"].ToString()); } } return(model); }
/// <summary> /// 得到一个对象实体 /// </summary> public cn.itcast.bookshop.Model.Cart GetModel(int Id) { StringBuilder strSql = new StringBuilder(); strSql.Append("select top 1 Id,UserId,BookId,Count from Cart "); strSql.Append(" where Id=@Id"); SqlParameter[] parameters = { new SqlParameter("@Id", SqlDbType.Int, 4) }; parameters[0].Value = Id; cn.itcast.bookshop.Model.Cart model = new cn.itcast.bookshop.Model.Cart(); DataSet ds = DbHelperSQL.Query(strSql.ToString(), parameters); if (ds.Tables[0].Rows.Count > 0) { return(DataRowToModel(ds.Tables[0].Rows[0])); } else { return(null); } }