标签：getc tco public 客户端 sharp har 抽象类 cas ring
学习笔记之设计模式二,简单工厂;
假设要取得数据库连接字符串,
1.创建抽象类:
public abstract class ConnectString
{
//输出字符串
public abstract string GetConnectString();
}
2.创建各个实体类:
public class SqlConnectString : ConnectString
{
public override string GetConnectString()
{
return "SQL ConnectString";
//throw new NotImplementedException();
}
}
public class MySqlConnectString : ConnectString
{
public override string GetConnectString()
{
return "MySql ConnectString";
//throw new NotImplementedException();
}
}
3.创建简单工厂类
public class SimpleFactory
{
/// <summary>
/// 静态方法创建Product实例
/// </summary>
public static ConnectString CreatConnectString(string dbtype)
{
ConnectString connect = null;
switch(dbtype)
{
case "MySql":
connect = new MySqlConnectString();
break;
case "SqlServer":
connect = new SqlConnectString();
break;
}
return connect;
}
}
4.客户端调用
static void Main(string[] args)
{
ConnectString connectString = SimpleFactory.CreatConnectString("MySql");
Console.WriteLine(connectString.GetConnectString());
ConnectString connectString2 = SimpleFactory.CreatConnectString("SqlServer");
Console.WriteLine(connectString2.GetConnectString());
Console.Read();
}
标签：getc tco public 客户端 sharp har 抽象类 cas ring
原文地址：http://www.cnblogs.com/yizhituoxie/p/7845308.html
