【C#设计模式(9)——组合模式(Component Pattern)】
//目录抽象类
public abstract class Directory
{
protected string _name;
public Directory(string name)
{
_name = name;
}
public abstract void Show();
}
//子目录
public class SubDirectory : Directory
{
public SubDirectory(string name) : base(name)
{
}
public override void Show()
{
Console.WriteLine($"sub directory show : {_name}");
}
}
//父目录
public class ParentDirectory : Directory
{
private List<Directory> children;
public ParentDirectory(string name) : base(name)
{
children = new List<Directory>();
}
public void Add(Directory catalogue)
{
children.Add(catalogue);
}
public void Remove(Directory catalogue)
{
children.Remove(catalogue);
}
public override void Show()
{
Console.WriteLine($"Parent directory show : {_name}");
foreach (var item in children)
{
item.Show();
}
}
}
/*
* 结构型模式：Structural Pattern
* 组合模式： Component Pattern
* 组合模式是将对象组合成树形结构以表示“整体-部分”的层次结构使客户终端代码更加简洁和灵活。
*/
internal class Program
{
static void Main(string[] args)
{
//创建父目录
ParentDirectory rootDirectory =new ParentDirectory("root");
ParentDirectory parentDirectory1 = new ParentDirectory("parent1");
ParentDirectory parentDirectory2 = new ParentDirectory("parent2");
//创建子目录
SubDirectory subDirectory1 = new SubDirectory("sub1");
SubDirectory subDirectory2 = new SubDirectory("sub2");
SubDirectory subDirectory3 = new SubDirectory("sub3");
//添加目录到...
rootDirectory.Add(parentDirectory1);
rootDirectory.Add(parentDirectory2);
parentDirectory1.Add(subDirectory1);
parentDirectory2.Add(subDirectory2);
parentDirectory2.Add(subDirectory3);
//查看目录
rootDirectory.Show();
Console.ReadLine();
}
}