管道式编程(收藏)

 参考：https://www.cnblogs.com/hippieZhou/p/11174644.html

摘录代码:

1.定义接口
public interface IPipelineStep<INPUT, OUTPUT>
{
    OUTPUT Process(INPUT input);
}


2.实现管道一
public class DoubleToIntStep : IPipelineStep<double, int>
{
    public int Process(double input)
    {
        return Convert.ToInt32(input);
    }
}


3.实现管道二
public class IntToStringStep : IPipelineStep<int, string>
{
    public string Process(int input)
    {
        return input.ToString();
    }
}


4.管道互联
public static class PipelineStepExtensions
{
    public static OUTPUT Step<INPUT, OUTPUT>(this INPUT input, IPipelineStep<INPUT, OUTPUT> step)
    {
        return step.Process(input);
    }
}


5.调用:
class Program
{
    static void Main(string[] args)
    {
        double input = 1024.1024;

        // 构建并使用管道
        string result = input.Step(new DoubleToIntStep())
                             .Step(new IntToStringStep());
        Console.WriteLine(result);
    }
}