设计模式学习--工厂模式
1.概述
工厂模式根据提供给他的数据，返回一个可能类中的一个类的实例。
2.示例
1
using System;
2using System.Collections.Generic;
3using System.Linq;
4using System.Text;
5using System.Reflection;
6
7namespace Factory
8
{
9
class Program
10
{
11 public static readonly string DAL = "OracleDAL";
12
13 static void Main(string[] args)
14 {
15 IDAL dal = (IDAL)Assembly.Load("Factory").CreateInstance("Factory." + DAL);
16 dal.DataAccess();
17 Console.ReadKey();
18
}
19 }
20
21 public interface IDAL
22 {
23 void DataAccess();
24 }
25
26 public class SqlServerDAL : IDAL
27 {
28 public void DataAccess()
29 {
30 Console.WriteLine("SqlServerDAL");
31 }
32 }
33
34 public class OracleDAL : IDAL
35 {
36 public void DataAccess()
37 {
38 Console.WriteLine("OracleDAL");
39 }
40 }
41
}
42
using System;2
using System.Collections.Generic;3
using System.Linq;4
using System.Text;5
using System.Reflection; 6
7
namespace Factory8
{
9
class Program10
{
11
public static readonly string DAL = "OracleDAL"; 12
13
static void Main(string[] args)14
{15
IDAL dal = (IDAL)Assembly.Load("Factory").CreateInstance("Factory." + DAL);16
dal.DataAccess();17
Console.ReadKey();18
}19
} 20
21
public interface IDAL22
{23
void DataAccess();24
} 25
26
public class SqlServerDAL : IDAL27
{28
public void DataAccess()29
{30
Console.WriteLine("SqlServerDAL");31
}32
} 33
34
public class OracleDAL : IDAL35
{36
public void DataAccess()37
{38
Console.WriteLine("OracleDAL");39
}40
}41
}42
