// 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 <CrudeProductData> FetchAllWithLimitAndOffset(int limit, int offset)
{
var dataList = new List <CrudeProductData>();
// create query against product
// 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 product_id, product_name, state_rcd, user_id, date_time, product_became_id
from [product]
order by product_name";
// 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 product
// 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 product
// 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 CrudeProductData();
data.Populate(reader);
dataList.Add(data);
}
count++;
if (count > limit + offset)
{
break;
}
}
}
return(dataList);
}
}
// fetch by Foreign key into new List of class instances
// links:
// docLink: http://sql2x.org/documentationLink/13095cd7-f136-4532-8969-c50c62cc05ef
public static List <CrudeProductData> FetchByStateRcd(string stateRcd)
{
var dataList = new List <CrudeProductData>();
// create query against product
// 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/86c78f05-a65f-4dfe-b048-d0cbece49f4e
string sql = @" select product_id, product_name, state_rcd, user_id, date_time, product_became_id
from [product]
where state_rcd = @state_rcd
order by product_name";
// 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/6fd25822-459f-4796-803a-071a3a270aa0
using (var conn = new SqlConnection(Conn.ConnectionString)) {
conn.Open();
using (var command = new SqlCommand(sql, conn)) {
// add foreign key column
// this foreign key column will be used together with the prepared ansi sql statement
// links:
// docLink: http://sql2x.org/documentationLink/8aec2e5c-4732-4662-badb-83b89d1c34a9
command.Parameters.Add("@state_rcd", SqlDbType.NVarChar).Value = stateRcd.Replace("'", "''");
// execute query against product
// if the query fails in the preprocessor of sql server
// an exception will be raised
// links:
// docLink: http://sql2x.org/documentationLink/bb9abe5c-d2c1-455a-b597-a2af0a35de5a
IDataReader reader = command.ExecuteReader(CommandBehavior.SingleResult);
// read all rows returned from the query of product
// read all columns from the datareader and
// populate the List of C# objects with them
// links:
// docLink: http://sql2x.org/documentationLink/5c413c03-5ddc-472a-a63d-53aecc7a2573
while (reader.Read())
{
var data = new CrudeProductData();
data.Populate(reader);
dataList.Add(data);
}
}
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:
// productId: primary key of table product
public static CrudeProductData GetByProductId(System.Guid productId)
{
// create query against product
// 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 product_id, product_name, state_rcd, user_id, date_time, product_became_id
from [product]
where product_id = @product_id
order by product_name";
var ret = new CrudeProductData();
// 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("@product_id", SqlDbType.UniqueIdentifier).Value = productId;
// execute query against product
// 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 <CrudeProductData> FetchAllWithLimit(int limit)
{
var dataList = new List <CrudeProductData>();
// create query against product
// 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() + @" product_id, product_name, state_rcd, user_id, date_time, product_became_id
from [product]
order by product_name";
// 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 product
// 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 product
// 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 CrudeProductData();
data.Populate(reader);
dataList.Add(data);
}
}
return(dataList);
}
}
// fetch all rows from table product into new List of class instances
// links:
// docLink: http://sql2x.org/documentationLink/7ca0c014-527e-4a0a-bd1f-12f4d8ea4b43
public static List <CrudeProductData> FetchAll()
{
var dataList = new List <CrudeProductData>();
// create query against product
// 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 product_id, product_name, state_rcd, user_id, date_time, product_became_id
from [product]
order by product_name";
// 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 product
// 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 product
// 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 CrudeProductData();
data.Populate(reader);
dataList.Add(data);
}
}
return(dataList);
}
}
// 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 <CrudeProductData> FetchWithFilter(System.Guid productId, string productName, string stateRcd, System.Guid userId, System.DateTime dateTime, System.Guid productBecameId)
{
var dataList = new List <CrudeProductData>();
// create query against product
// 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 product_id, product_name, state_rcd, user_id, date_time, product_became_id
from [product]
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 (productId != Guid.Empty)
{
sql += " and product_id = @product_id";
command.Parameters.Add("@product_id", SqlDbType.UniqueIdentifier).Value = productId;
}
if (!string.IsNullOrEmpty(productName))
{
sql += " and product_name like '%' + @product_name + '%'";
command.Parameters.Add("@product_name", SqlDbType.NVarChar).Value = productName.Replace("'", "''");
}
if (!string.IsNullOrEmpty(stateRcd))
{
sql += " and state_rcd like '%' + @state_rcd + '%'";
command.Parameters.Add("@state_rcd", SqlDbType.NVarChar).Value = stateRcd.Replace("'", "''");
}
if (userId != Guid.Empty)
{
sql += " and user_id = @user_id";
command.Parameters.Add("@user_id", SqlDbType.UniqueIdentifier).Value = userId;
}
if (dateTime != DateTime.MinValue)
{
sql += " and date_time = @date_time";
command.Parameters.Add("@date_time", SqlDbType.DateTime).Value = dateTime;
}
if (productBecameId != Guid.Empty)
{
sql += " and product_became_id = @product_became_id";
command.Parameters.Add("@product_became_id", SqlDbType.UniqueIdentifier).Value = productBecameId;
}
sql += " order by product_name";
command.CommandText = sql;
// execute query against product
// 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 product
// 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 CrudeProductData();
data.Populate(reader);
dataList.Add(data);
}
}
return(dataList);
}
}