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c# 组合模式
来源: 互联网 发布时间:2014-10-15
本文导语: 结构图: 抽象对象: 代码如下: abstract class Component { protected string name; public Component(string name) { this.name = name; } public abstract void Add(Component c); ...
结构图:
抽象对象:
abstract class Component
{
protected string name;
public Component(string name)
{
this.name = name;
}
public abstract void Add(Component c);
public abstract void Remove(Component c);
public abstract void Display(int depth);
}
无子节点的:
class Leaf : Component
{
public Leaf(string name)
: base(name)
{ }
public override void Add(Component c)
{
//throw new NotImplementedException();
Console.WriteLine("Cannot add to a Leaf");
}
public override void Remove(Component c)
{
//throw new NotImplementedException();
Console.WriteLine("Cannot remove to a Leaf");
}
public override void Display(int depth)
{
//throw new NotImplementedException();
Console.WriteLine(new string('-', depth) + name);
}
}
可以有子结点:
class Composite : Component
{
private List children = new List();
public Composite(string name)
: base(name)
{ }
public override void Add(Component c)
{
//throw new NotImplementedException();
children.Add(c);
}
public override void Remove(Component c)
{
//throw new NotImplementedException();
children.Remove(c);
}
public override void Display(int depth)
{
//throw new NotImplementedException();
Console.WriteLine(new string('-', depth) + name);
foreach (Component component in children)
{
component.Display(depth + 2);
}
}
}
主函数调用:
class Program
{
static void Main(string[] args)
{
Composite root = new Composite("root");
root.Add(new Leaf("Leaf A"));
root.Add(new Leaf("Leaf B"));
Composite comp = new Composite("Composite X");
comp.Add(new Leaf("Leaf XA"));
comp.Add(new Leaf("Leaf XB"));
root.Add(comp);
Composite comp2 = new Composite("Composite X");
comp2.Add(new Leaf("Leaf XYA"));
comp2.Add(new Leaf("Leaf XYB"));
comp.Add(comp2);
root.Display(1);
Console.ReadKey();
}
}
抽象对象:
代码如下:
abstract class Component
{
protected string name;
public Component(string name)
{
this.name = name;
}
public abstract void Add(Component c);
public abstract void Remove(Component c);
public abstract void Display(int depth);
}
无子节点的:
代码如下:
class Leaf : Component
{
public Leaf(string name)
: base(name)
{ }
public override void Add(Component c)
{
//throw new NotImplementedException();
Console.WriteLine("Cannot add to a Leaf");
}
public override void Remove(Component c)
{
//throw new NotImplementedException();
Console.WriteLine("Cannot remove to a Leaf");
}
public override void Display(int depth)
{
//throw new NotImplementedException();
Console.WriteLine(new string('-', depth) + name);
}
}
可以有子结点:
代码如下:
class Composite : Component
{
private List children = new List();
public Composite(string name)
: base(name)
{ }
public override void Add(Component c)
{
//throw new NotImplementedException();
children.Add(c);
}
public override void Remove(Component c)
{
//throw new NotImplementedException();
children.Remove(c);
}
public override void Display(int depth)
{
//throw new NotImplementedException();
Console.WriteLine(new string('-', depth) + name);
foreach (Component component in children)
{
component.Display(depth + 2);
}
}
}
主函数调用:
代码如下:
class Program
{
static void Main(string[] args)
{
Composite root = new Composite("root");
root.Add(new Leaf("Leaf A"));
root.Add(new Leaf("Leaf B"));
Composite comp = new Composite("Composite X");
comp.Add(new Leaf("Leaf XA"));
comp.Add(new Leaf("Leaf XB"));
root.Add(comp);
Composite comp2 = new Composite("Composite X");
comp2.Add(new Leaf("Leaf XYA"));
comp2.Add(new Leaf("Leaf XYB"));
comp.Add(comp2);
root.Display(1);
Console.ReadKey();
}
}