什么是C＃中的整数引用类型？ [英] What is the integer reference type in C#?

问题描述

我想有它可以设置为null，不希望有使用 INT整数变量？ MYVARIABLE 语法。我试着用 INT 和的Int16 无济于事。我一定要使用诠释？ MYVARIABLE ？

I'd like to have an integer variable which can be set to null and don't want to have to use the int? myVariable syntax. I tried using int and Int16 to no avail. Do I have to use int? myVariable?

我因为在Java提到这同时存在一个'廉政'类型（基本）和整数（引用类型）。我想，以确保没有，我可以使用内置的整数引用类型。我会用'诠释？对于我在做什么。

I mentioned this because in Java there is both an 'int' type (a primitive) and 'Integer' (a reference type). I wanted to be sure that there isn't a built-in integer reference type that I could be using. I'll use 'int?' for what I'm doing.

推荐答案

有关信息， INT ？ / 可空< T> 是不会引用类型;它只是一个空类型，意思是：一个结构（主要是和 INT 和布尔标记）具有特殊编译规则（重新null检查，运营商等）和CLI规则（装箱/拆箱）。有是的.NET中没有整数引用类型，除非你计数拳击：

For info, int? / Nullable<T> is not a reference-type; it is simply a "nullable type", meaning: a struct (essentially and int and a bool flag) with special compiler rules (re null checks, operators, etc) and CLI rules (for boxing/unboxing). There is no "integer reference-type" in .NET, unless you count boxing:

int i = 123;
object o = i; // box

但是这创造了一个不必要的对象，有很多相关的其他问题。

but this creates an unnecessary object and has lots of associated other issues.

有关你想要什么， INT？应该是理想的。您的可能的使用长手语法（可空< INT> ），但IMO这是不必要的冗长，我已经看到了蛊惑人心。

For what you want, int? should be ideal. You could use the long-hand syntax (Nullable<int>) but IMO this is unnecessarily verbose, and I've seen it confuse people.

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