如何确定类型是自定义结构? [英] How to decide a Type is a custom struct?

问题描述

对于 Type ，C#中具有属性 IsClass ，但是如何确定 Type 是结构?

For a Type, there is a property IsClass in C#, but how to decide a Type is a struct?

尽管 IsValueType 是必要条件，但显然还不够.对于 int 也是一种值类型.

Although IsValueType is a necessary condition, it is obviously not enough. For an int is a value type also.

有人建议以下代码:

bool IsStruct = type.IsValueType && !type.IsEnum && !type.IsPrimitive;

但是我不确定这是否是一种准确的方法.该公式应说明struct和其他类型(例如 DateTime ， int 和 array s)之间的区别.

But I am not sure whether it is an accurate method. The formula should tell the difference between struct and other types such as DateTime, int and arrays.

正如一些朋友指出的那样，我的意思是用户定义的结构而不是预定义的类型，例如 DateTime .

As some friends have pointed out that here, I mean user defined struct and not predefined types, such as DateTime.

推荐答案

从技术上讲，int也是结构.IsPrimitive只是检查类型是否是CLR处理的基本类型之一.建议您 IsValueType&&！Enum&&！IsPrimitive .

Technically, an int is also a struct. IsPrimitive just checks if the type is one of the primitive types the CLR handles a little differently. You should be fine with the suggestion IsValueType && !IsEnum && !IsPrimitive.

如果仅需要自定义结构(即BCL不提供的结构)，则可能会遇到排除以"System." 开头的FullName的类型，或者只包含您自己的结构的情况.对按程序集或名称空间进行过滤或使用自定义属性感兴趣.

If you want only custom structs (i.e. those not supplied by the BCL), you may have luck excluding types with a FullName that starts with "System.", or only including the ones you're interested in by filtering by assembly or namespace, or use a custom attribute.

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