哪种C#设计模式适合在asp.net中编写自定义工作流

State 图案( wikipedia link )?

public abstract class State
{
    /// <summary>
    /// Holds the current state we're in.
    /// </summary>
    public State CurrentState
    { 
        get; 
        set; 
    }

    public virtual string Cancelled(State context)
    {
        return "";
    }

    public virtual string RequestedByUser(State context)
    {
        return "";
    }

    public virtual string RequestedByManager(State context)
    {
        return "";
    }
}

public class CancelledState : State
{
    public override string Cancelled(State context)
    {
        context.CurrentState = new SittingState();
        return "Cancelled.";
    }

    public override string RequestedByUser(State context)
    {
        context.CurrentState = new RequestedByUserState();
        return "Requested by User.";
    }

    public override string RequestedByManager(State context)
    {
        return "You can't do this before it's been requested by the User";
    }
}

// (RequestedByUserState and RequestedByManagerState classes have been cut out)

正如你所看到的,这种模式确实非常适合。

Chain of Responsibility 如果存在安全问题,也可能与此相关。如果维基百科的文章毫无意义那么 this book 两者都有很好的例子。另一个是向导的命令模式。它们都不完美,但它们给了你一些好主意。

设计模式并不特定于任何语言(C#设计模式?)。

看见 http://www.javaworld.com/javaworld/jw-10-2001/jw-1019-dispatcher.html

您也可以考虑在C语言中评估替代的、现有的开源工作流框架,比如NetBPM。 http://www.netbpm.org/