如何存储从switch语句的案件清单？ [英] How to store a list of Cases from Switch Statement?

问题描述

在我的节目，我有，当用户双击一个对象，它看起来switch语句来看看应该发生什么事件列表框。由于名单开始变得越来越大我很好奇，如果在switch语句中有以避免维持2个地方（一次在列表中的对象列表添加到列表框的方式，一旦。
有没有一种方法来索引/读取/存储我的switch语句的各种情况，然后将其作为对象添加到我的列表框？

In my program I have a listbox that when the user double clicks an object it looks to a switch statement to see what event should occur. As the list begins getting larger I'm curious if there is a way to avoid having to maintain the list of objects in 2 places (once in a list to Add to the listbox, and once in the switch statement. Is there a way to index/read/store the various Cases of my switch statement, then add them as objects to my listbox?

例如：（不工作，只是一个理论）

Example: (doesn't work, just a theory)

Switch (n)
ForEach (Case c in Cases)
{
   arrayCases.Add(c);
}
listbox.Items.AddRange(arrayCases);

编辑：

去的字典建议我现在有：

Going on the Dictionary recommendations I now have:

public void SetDictionary()
    {
       //add entries to the dictionary
        dict["cat"] = new Action(Cat);
        dict["dog"] = new Action(Dog);

        //add each dictionary entry to the listbox.
        foreach (string key in dict.Keys)
        {
            listboxTest.Items.Add(key);
        }                            
    }

     //when an item in the listbox is double clicked
     private void listboxTest_DoubleClick(object sender, EventArgs e)
     {
         testrun(listboxCases.SelectedItem.ToString());             
     }

     public void testrun(string n)
     {
         //this is supposed to receive the item that was double clicked in the listbox, and run it's corresponding action as defined in the dictionary.
         var action = dict[n] as Action action();
     }

我相信我的code以上大多是正确的，而且我理解它，然而行动路线：
     VAR行动=字典[n]，如行动对行动（）;

I believe that my code above is mostly correct and that I'm understanding it, however the action line: var action = dict[n] as Action action();

显示一个错误，说明'行动期待一个;。这里是我的逻辑准确吗？如果是这样，为什么动作调用不正确的？

Shows an error stating 'action' is expecting a ';'. Is my logic here accurate? If so, why is the action call incorrect?

推荐答案

词典＆LT;字符串，作用＆gt; 是要避免的方式。 Dictionary.Keys 变成 ListBox.Items 。

Dictionary<string, Action> is the way to avoid. Dictionary.Keys becomes ListBox.Items.

开关（N）变为

var action = dict[n] as Action
action();

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