DalDiaDiem.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.SqlClient;
using TourDuLich.BIZ;
namespace TourDuLich.DAL
{
class DalDiaDiem
{
public static List<BizDiaDiem> getAllDiaDiem()
{
List<BizDiaDiem> result = new List<BizDiaDiem>();
// 1. Instantiate the connection
SqlConnection conn = new SqlConnection(
@"Data Source=CAOTH-LAPTOP\SQLEXPRESS2K5_2N;Initial Catalog=TourDB;User ID=sa;Password=sa");
SqlDataReader rdr = null;
try
{
// 2. Open the connection
conn.Open();
// 3. Pass the connection to a command object
SqlCommand cmd = new SqlCommand("select * from DiaDiem", conn);
// get query results
rdr = cmd.ExecuteReader();
while (rdr.Read())
{
BizDiaDiem dd = new BizDiaDiem(Int32.Parse(rdr["Id"].ToString()),
rdr["MaDiaDiem"].ToString(), rdr["TenDiaDiem"].ToString());
result.Add(dd);
}
}
finally
{
// close the reader
if (rdr != null)
{
rdr.Close();
}
// 5. Close the connection
if (conn != null)
{
conn.Close();
}
}
return result;
}
internal static int Insert(BizDiaDiem bizDiaDiem)
{
int result = bizDiaDiem.Id;
// 1. Instantiate the connection
SqlConnection conn = new SqlConnection(
@"Data Source=CAOTH-LAPTOP\SQLEXPRESS2K5_2N;Initial Catalog=TourDB;User ID=sa;Password=sa");
SqlDataReader rdr = null;
try
{
// 2. Open the connection
conn.Open();
// 3. Pass the connection to a command object
String s = String.Format("insert into DiaDiem(MaDiaDiem, TenDiaDiem) values('{0}', '{1}')", bizDiaDiem.MaDD, bizDiaDiem.TenDD);
SqlCommand cmd = new SqlCommand(s, conn);
if (cmd.ExecuteNonQuery() > 0)
{
s = String.Format("select Id from DiaDiem where MaDiaDiem='{0}'", bizDiaDiem.MaDD);
cmd.CommandText = s;
rdr = cmd.ExecuteReader();
if(rdr.HasRows)
{
rdr.Read();
result = Int32.Parse(rdr["Id"].ToString());
}
}
}
finally
{
// close the reader
if (rdr != null)
{
rdr.Close();
}
// 5. Close the connection
if (conn != null)
{
conn.Close();
}
}
return result;
}
internal static void Delete(BizDiaDiem bizDiaDiem)
{
// 1. Instantiate the connection
SqlConnection conn = new SqlConnection(
@"Data Source=CAOTH-LAPTOP\SQLEXPRESS2K5_2N;Initial Catalog=TourDB;User ID=sa;Password=sa");
try
{
// 2. Open the connection
conn.Open();
// 3. Pass the connection to a command object
String s = String.Format("delete DiaDiem where id={0}", bizDiaDiem.Id);
SqlCommand cmd = new SqlCommand(s, conn);
if (cmd.ExecuteNonQuery() > 0)
{
}
}
finally
{
// 5. Close the connection
if (conn != null)
{
conn.Close();
}
}
}
internal static void Update(BizDiaDiem bizDiaDiem)
{
// 1. Instantiate the connection
SqlConnection conn = new SqlConnection(
@"Data Source=CAOTH-LAPTOP\SQLEXPRESS2K5_2N;Initial Catalog=TourDB;User ID=sa;Password=sa");
try
{
// 2. Open the connection
conn.Open();
// 3. Pass the connection to a command object
String s = String.Format("update DiaDiem set MaDiaDiem = '{0}', TenDiaDiem = '{1}' where id={2}", bizDiaDiem.MaDD, bizDiaDiem.TenDD, bizDiaDiem.Id);
SqlCommand cmd = new SqlCommand(s, conn);
if (cmd.ExecuteNonQuery() > 0)
{
}
}
finally
{
// 5. Close the connection
if (conn != null)
{
conn.Close();
}
}
}
internal static List<BizDiaDiem> getDiaDiemByTour(BizTour bizTour)
{
List<BizDiaDiem> result = new List<BizDiaDiem>();
// 1. Instantiate the connection
SqlConnection conn = new SqlConnection(
@"Data Source=CAOTH-LAPTOP\SQLEXPRESS2K5_2N;Initial Catalog=TourDB;User ID=sa;Password=sa");
SqlDataReader rdr = null;
try
{
// 2. Open the connection
conn.Open();
// 3. Pass the connection to a command object
string s = String.Format(@"select dd.Id, dd.MaDiaDiem, dd.TenDiaDiem
from DanhSachDiemThamQuan dtq, DiaDiem dd
where dtq.DiaDiemId = dd.Id and
dtq.TourId = {0} order by dtq.Stt", bizTour.Id);
SqlCommand cmd = new SqlCommand(s, conn);
// get query results
rdr = cmd.ExecuteReader();
while (rdr.Read())
{
BizDiaDiem dd = new BizDiaDiem(Int32.Parse(rdr["Id"].ToString()),
rdr["MaDiaDiem"].ToString(), rdr["TenDiaDiem"].ToString());
result.Add(dd);
}
}
finally
{
// close the reader
if (rdr != null)
{
rdr.Close();
}
// 5. Close the connection
if (conn != null)
{
conn.Close();
}
}
return result;
}
}
}
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