我如何找出一个类创建了多少个对象 [英] How can I find out how many objects are created of a class

问题描述

我如何找出在C＃中为一个类创建了多少个对象？

How can I find out how many objects are created of a class in C#?

推荐答案

您必须放入一个静态计数器，该计数器在构造上递增：

You'd have to put a static counter in that was incremented on construction:

public class Foo
{
    private static long instanceCount;

    public Foo()
    {
        // Increment in atomic and thread-safe manner
        Interlocked.Increment(ref instanceCount);
    }
}

一些注意事项：

• 这不计算当前正在存储的实例的数量-这需要使用终结器来减少计数器；我不建议


• 这不包括通过某些机制（例如序列化）创建的实例，这些机制可能会绕过构造函数


• 显然，这仅在以下情况下有效您可以修改课程；例如，您无法找出所创建的 System.String 的实例数量-至少在没有不插入调试/概要分析API的情况下，

• This doesn't count the number of currently in memory instances - that would involve having a finalizer to decrement the counter; I wouldn't recommend that
• This won't include instances created via some mechanisms like serialization which may bypass a constructor
• Obviously this only works if you can modify the class; you can't find out the number of instances of System.String created, for example - at least not without hooking into the debugging/profiling API

为什么您不想要此信息？

Why do you want this information, out of interest?

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