指向 getters/setters 的字典

Question

是否可以创建指向 getter 和 setter 的字典？

例如：

public class test
{
  public Dictionary<string, int> pointer = new Dictionary<string,int>()
  {
    { "a", a }
  }; // the goal is to do pointer["a"] = someInt or print(pointer[a])
  
  public int a { get { return b;} set { b = 2; } }
  public int b;
}

Answer 1

很可能您实际上并没有尝试将 getter 和 setter 放入字典中，而是您正在尝试通过名称访问属性。 This is easily possible through Reflection. 如果这是你的问题，你应该将其标记为重复并关闭问题。

但是，您实际问题的答案是肯定的。可以制作指向 getter 和 setter 的字典。您将需要使用一些 lambda 编程。这是一种方法：

public class test
{
    public Dictionary<string, GetSet<int>> pointer;

    public test()
    {
        pointer = new Dictionary<string, GetSet<int>>()
        {
            { "a", new(()=>a,i=>a = i) }
        };
    }

    public int a { get { return b; } set { b = 2; } }
    public int b;
}

public class GetSet<T>
{
    private readonly Func<T> _get;
    private readonly Action<T> _set;

    public GetSet(Func<T> get, Action<T> set)
    {
        _get = get;
        _set = set;
    }

    public T Get() => _get();
    public void Set(T value) => _set(value);
}

用法：

    var test = new test();
    var property = test.pointer["a"];
    var value = property.Get();//returns the value of test.a
    property.Set(3);//sets test.a to 3

指向 getters/setters 的字典

Dictionary that points to getters/setters

c#

getter

setter

dictionary