C＃：如何对动态对象执行空检查 [英] C#: How to perform a null-check on a dynamic object

问题描述

如何在动态对象上执行空检查？

How do I perform a null-check on a dynamic object?

伪代码：

public void Main() {
    dynamic dynamicObject = 33;
    if(true) { // Arbitrary logic
        dynamicObject = null;
    }
    Method(dynamicObject);
}

public void Method(dynamic param) {
    // TODO: check if the content of 'param' is equal to null
}

推荐答案

您是否担心动态对象将有自定义相等运算符这将改变 null 的解释方式？如果是这样，只需使用 Object.ReferenceEquals

Are you worried about the possibility the dynamic object will have a custom equality operator that will change the way the null is interpreted? If so just use Object.ReferenceEquals

if (Object.ReferenceEquals(null, param)) {
  .......
}

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