// fetch all from table into new List of class instances, filtered by any column // links: // docLink: http://sql2x.org/documentationLink/a736bbfd-030d-492e-a86a-7a5e478eeb79 public static List <CrudeCartUserData> FetchWithFilter(System.Guid cartUserId) { var dataList = new List <CrudeCartUserData>(); // create query against cart_user // this will be ansi sql and parameterized // parameterized queries are a good way of preventing sql injection // and to make sure the query plan is pre-compiled // links: // docLink: http://sql2x.org/documentationLink/06da7a50-8760-48cd-b789-a41cac3edd13 string sql = @" select cart_user_id from [cart_user] where 1 = 1"; // open standard connection // the connection is found in web.config // the connection is closed upon completion of the reader // links: // docLink: http://sql2x.org/documentationLink/6ec2495f-3a49-4a94-ad59-0ce064fc8654 using (var conn = new SqlConnection(Conn.ConnectionString)) { conn.Open(); using (var command = new SqlCommand(sql, conn)) { // add search column(s) if they are not null or empty // this search column(s) will be used together with the prepared ansi sql statement // links: // docLink: http://sql2x.org/documentationLink/2193123a-3534-412b-8521-dac14bb3884d if (cartUserId != Guid.Empty) { sql += " and cart_user_id = @cart_user_id"; command.Parameters.Add("@cart_user_id", SqlDbType.UniqueIdentifier).Value = cartUserId; } command.CommandText = sql; // execute query against cart_user // if the query fails in the preprocessor of sql server // an exception will be raised // links: // docLink: http://sql2x.org/documentationLink/9f9fcbf4-4764-4b2e-8dc6-41d0366c95c9 IDataReader reader = command.ExecuteReader(CommandBehavior.SingleResult); // read all rows returned from the query of cart_user // read all columns from the datareader and // populate the List of C# objects with them // links: // docLink: http://sql2x.org/documentationLink/60181c7c-4a5e-41a3-9599-4e7a0aaf0cc8 while (reader.Read()) { var data = new CrudeCartUserData(); data.Populate(reader); dataList.Add(data); } } return(dataList); } }
// fetch all from table into new List of class instances, only populating specific columns, // with a limit on number of returned rows and order by columns starting at a specific row // links: // docLink: http://sql2x.org/documentationLink/12d2812e-e963-4f26-8014-48c4e9cfb3ae public static List <CrudeCartUserData> FetchAllWithLimitAndOffset(int limit, int offset) { var dataList = new List <CrudeCartUserData>(); // create query against cart_user // this will be ansi sql and parameterized // parameterized queries are a good way of preventing sql injection // and to make sure the query plan is pre-compiled // links: // docLink: http://sql2x.org/documentationLink/21eca289-4747-4a75-b0a2-1a58457be608 string sql = @" select cart_user_id from [cart_user]"; // open standard connection // the connection is found in web.config // the connection is closed upon completion of the reader // links: // docLink: http://sql2x.org/documentationLink/c3e624a4-8479-4c17-bec7-ec09f3abbe64 using (var conn = new SqlConnection(Conn.ConnectionString)) { conn.Open(); using (var command = new SqlCommand(sql, conn)) { // execute query against cart_user // if the query fails in the preprocessor of sql server // an exception will be raised // links: // docLink: http://sql2x.org/documentationLink/6507b543-adbc-4863-810b-8db439f40d5c IDataReader reader = command.ExecuteReader(CommandBehavior.SingleResult); int count = 0; // read all rows returned from the query of cart_user // read all columns from the datareader and // populate the List of C# objects with them // links: // docLink: http://sql2x.org/documentationLink/fcd15e2f-df3f-44d8-8a13-d2e93d97f685 while (reader.Read()) { if ((count >= offset) && (count <= offset + limit)) { var data = new CrudeCartUserData(); data.Populate(reader); dataList.Add(data); } count++; if (count > limit + offset) { break; } } } return(dataList); } }
// fetch by Primary key into new class instance // links: // crud definition: https://en.wikipedia.org/wiki/Create,_read,_update_and_delete // docLink: http://sql2x.org/documentationLink/7a625d0a-3028-42ce-a543-72ea3673cef4 // parameters: // cartUserId: primary key of table cart_user public static CrudeCartUserData GetByCartUserId(System.Guid cartUserId) { // create query against cart_user // this will be ansi sql and parameterized // parameterized queries are a good way of preventing sql injection // and to make sure the query plan is pre-compiled // links: // docLink: http://sql2x.org/documentationLink/72f5fc83-c460-40fe-bac9-73b7ee0c6b77 string sql = @" select top 1 cart_user_id from [cart_user] where cart_user_id = @cart_user_id"; var ret = new CrudeCartUserData(); // open standard connection // the connection is found in web.config // the connection is closed upon completion of the reader // links: // docLink: http://sql2x.org/documentationLink/1ecca728-0c07-4dd7-b095-d10777b25b70 using (var conn = new SqlConnection(Conn.ConnectionString)) { conn.Open(); using (var command = new SqlCommand(sql, conn)) { // add primary key // this primary key will be used together with the prepared ansi sql statement // links: // docLink: http://sql2x.org/documentationLink/1ecca728-0c07-4dd7-b095-d10777b25b70 command.Parameters.Add("@cart_user_id", SqlDbType.UniqueIdentifier).Value = cartUserId; // execute query against cart_user // if the query fails in the preprocessor of sql server // an exception will be raised // links: // docLink: http://sql2x.org/documentationLink/fd5c5faa-b400-4f29-b12b-9675c53a757f IDataReader reader = command.ExecuteReader(CommandBehavior.SingleRow); // populate serialized class if a row was found if (reader.Read()) { ret.Populate(reader); } } } return(ret); }
// fetch all from table into new List of class instances, with a limit on number of returned rows and order by columns // links: // docLink: http://sql2x.org/documentationLink/dfaa482b-059b-4f17-a9a9-4885138dbb46 public static List <CrudeCartUserData> FetchAllWithLimit(int limit) { var dataList = new List <CrudeCartUserData>(); // create query against cart_user // this will be ansi sql and parameterized // parameterized queries are a good way of preventing sql injection // and to make sure the query plan is pre-compiled // links: // docLink: http://sql2x.org/documentationLink/41f82773-6d37-4ebe-840c-c60e06337f45 string sql = @" select top " + limit.ToString() + @" cart_user_id from [cart_user]"; // open standard connection // the connection is found in web.config // the connection is closed upon completion of the reader // links: // docLink: http://sql2x.org/documentationLink/da228d98-b30e-4d79-89ae-98e813437753 using (var conn = new SqlConnection(Conn.ConnectionString)) { conn.Open(); using (var command = new SqlCommand(sql, conn)) { // execute query against cart_user // if the query fails in the preprocessor of sql server // an exception will be raised // links: // docLink: http://sql2x.org/documentationLink/c32ad724-8a03-4b4c-b6fb-a5abfb1d707e IDataReader reader = command.ExecuteReader(CommandBehavior.SingleResult); // read all rows returned from the query of cart_user // read all columns from the datareader and // populate the List of C# objects with them // links: // docLink: http://sql2x.org/documentationLink/9ba4395d-d8a4-4427-b80f-7b828e34da7a while (reader.Read()) { var data = new CrudeCartUserData(); data.Populate(reader); dataList.Add(data); } } return(dataList); } }
// fetch all rows from table cart_user into new List of class instances // links: // docLink: http://sql2x.org/documentationLink/7ca0c014-527e-4a0a-bd1f-12f4d8ea4b43 public static List <CrudeCartUserData> FetchAll() { var dataList = new List <CrudeCartUserData>(); // create query against cart_user // this will be ansi sql and parameterized // parameterized queries are a good way of preventing sql injection // and to make sure the query plan is pre-compiled // links: // docLink: http://sql2x.org/documentationLink/72f9f1bc-447c-4327-9d26-4b0790a07ff8 string sql = @" select cart_user_id from [cart_user]"; // open standard connection // the connection is found in web.config // the connection is closed upon completion of the reader // links: // docLink: http://sql2x.org/documentationLink/952b3f82-bc00-4e82-9430-6bc26ff8bc4d using (var conn = new SqlConnection(Conn.ConnectionString)) { conn.Open(); using (var command = new SqlCommand(sql, conn)) { // execute query against cart_user // if the query fails in the preprocessor of sql server // an exception will be raised // links: // docLink: http://sql2x.org/documentationLink/ed55cc5b-d6be-4f5e-9385-ee726dfc2bf1 IDataReader reader = command.ExecuteReader(CommandBehavior.SingleResult); // read all rows returned from the query of cart_user // read all columns from the datareader and // populate the List of C# objects with them // links: // docLink: http://sql2x.org/documentationLink/c1b8b800-b250-4822-a699-d93a35f4414d while (reader.Read()) { var data = new CrudeCartUserData(); data.Populate(reader); dataList.Add(data); } } return(dataList); } }