有没有办法从Func <T,string>转换为Func <dynamic,string>？

Question

我有一个Func<T, string>我想转换成的Func<dynamic, string>.可能吗？

Answer 1

干得好.当您的动态值不是类型时,只需要决定要执行的操作T:

public Func<dynamic, string> ConvertToDynamicFunc<T>(Func<T, string> typedFunc)
{
    Func<dynamic, string> dynamicFunc = (input) =>
    {
        if (input is T)
            return typedFunc((T)input);

        return null; //or throw?
    };

    return dynamicFunc;
}

Func<int, string> typedFunc = (input) => input.ToString();
Func<dynamic, string> dynamicFunc = ConvertToDynamicFunc(typedFunc);
System.Console.WriteLine(dynamicFunc(10));//outputs "10";
System.Console.WriteLine(dynamicFunc(10.5));//outputs null since a double isn't an int (type T) or throw if you prefer;