public static List <String[]> getCTHDbyID(String id)
{
SqlConnection conn = Connection.GetConnection();
conn.Open();
List <String[]> result = new List <String[]>();
String sql = $"select CTHoaDon.id,CTHoaDon.soluong,ThietBi.id,ThietBi.ten,ThietBi.gia,ThietBi.soluong,ThietBi.loai from CTHoaDon, ThietBi where CTHoaDon.idthietbi = ThietBi.id AND CTHoaDon.id='{id}'";
try
{
SqlCommand cmd = conn.CreateCommand();
cmd.CommandText = sql;
SqlDataReader reader = cmd.ExecuteReader();
if (reader.HasRows)
{
while (reader.Read())
{
String[] tmp = new String[10];
for (int i = 0; i < reader.FieldCount; i++)
{
tmp[i] = reader[i].ToString();
}
result.Add(tmp);
}
}
;
return(result);
}
catch (Exception e)
{
Console.WriteLine("Error: " + e);
Console.WriteLine(e.StackTrace);
return(result);
}
finally
{
conn.Close();
conn.Dispose();
}
}
public static String[] getLoaiTB()
{
String[] result = {};
SqlConnection conn = Connection.GetConnection();
conn.Open();
String sql = "SELECT loai FROM ThietBi GROUP BY loai";
try
{
SqlCommand cmd = conn.CreateCommand();
cmd.CommandText = sql;
SqlDataReader reader = cmd.ExecuteReader();
List <String> tmp = new List <string>();
while (reader.Read())
{
tmp.Add(reader[0].ToString());
}
result = new string[tmp.Count];
for (int i = 0; i < tmp.Count; i++)
{
result[i] = tmp[i];
}
return(result);
}
catch (Exception e)
{
Console.WriteLine("Error: " + e);
Console.WriteLine(e.StackTrace);
return(result);
}
finally
{
conn.Close();
conn.Dispose();
}
}
