[已解决]返回Nullable基本类型/字符串的通用方法 [英] [Solved] Generic method for returning Nullable primitive types / Strings

问题描述

嗨.

我正在尝试编写一个可以返回任何可为空的原始类型或字符串的方法. I.E.

Hi.

I''m tring to write a method that can return any nullable primitive type, or a string. I.E.

public T Read<t>(string value)
{
   // read code
   //[...]

   if (someCondition)
     return null;

   return (T)obj;
}
</t>

问题是我应该对T施加什么条件，以便可以返回null和可为空的基元.我不能说"where T:nullable"是可空的，而且我不能说"where T:class"是可空基元不是引用类型.

The question is what condition I should impose on T to make it so that I can return null''s and nullable primitives. I can''t say "where T : nullable" as nullable is sealed and I can''t say "where T : class" as nullable primitives aren''t reference types.

Ideas?

推荐答案

找到解决方案-使用return default(T)代替null.

Solution found - use return default(T) instead of null.

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