重构长switch语句 [英] Refactor long switch statement

问题描述

我的程序中，你控制通过口述命令C＃所以现在我有很长的switch语句。类似于

I'm program in c# which you controlling by dictating command so now i have a long switch statement. Something like

switch (command)

{
    case "Show commands":
        ProgramCommans.ShowAllCommands();
        break;
    case "Close window":
        ControlCommands.CloseWindow();
        break;
    case "Switch window":
        ControlCommands.SwitchWindow();
        break;
}

等

几乎所有的情况下调用只有一个方法，方法并不在一类它们分布在许多类。所以，问题是，我怎么能重构这个开关，更优雅的方式？

Almost all cases call only one method, methods are not in one class they are distributed in many classes. So the question is, how i could refactor this switch to more elegant way?

推荐答案

您可以做到这一点重构你的switch语句：

You can do this to refactor your switch statement:

var commands = new Dictionary<string, Action>()
{
    { "Show commands", () => ProgramCommans.ShowAllCommands() },
    { "Close window", () => ControlCommands.CloseWindow() },
    { "Switch window", () => ControlCommands.SwitchWindow() },
};

if (commands.ContainsKey(command))
{
    commands[command].Invoke();
}

的主要优点这种方法是可以改变的开关在运行时。

The main advantage to this approach is that you can change the "switch" at run-time.

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