如何用零填充可为空的整数? [英] How can I pad nullable ints with zeros?

问题描述

有什么方法可以像普通int一样填充可为null的int值?

Is there any way to pad nullable int with zeros the way you can with normal int?

myInt.ToString("D3")似乎不适用于nullale整数，但是对于我当前的项目，我感觉我需要使用可为空的int，以便在数组中获取null值，而不是默认值0

the myInt.ToString("D3") doesn't seem to work on nullale ints but for my current project I feel like I need to use nullable int in order to get the null value in my array instead of 0 as the default.

推荐答案

这是因为int?实际上是Nullable<T>，其中T是int.

That is because int? is actually Nullable<T> where T is int here.

调用ToString将在Nullable结构而不是int上调用它. Nullable<T>不了解int具有的ToString重载.

Calling ToString will call that on the Nullable struct, not the int. Nullable<T> has no knowledge of the overloads of ToString which int has.

您必须先获取整数值:

myInt.GetValueOrDefault(0).ToString("D3")

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