如何在代码中使用.Equals [英] How to use .Equals in the code

问题描述

我可以使用以下代码行说不等于

Hi,

Can I use the following line of code for saying not equal to

if (!(CANMsgIdList[f].Bus).Equals(ConsoleApplication13.Buses.CANBusGreen)

< br $>




谢谢

John

Thanks
John

推荐答案

是的。

因为您的 Buses 是一个枚举，它也可以正常工作，它将是一个值比较而不是引用。如果 Buses 是一个类，那么它可能无法准确给出您的预期。

Yes.
Because your Buses is an enum, it will also work fine, and it will be a value comparison rather than a reference. If Buses was a class, then it might not give exactly what you expected.

如果使用.Equals将类的实例与枚举值进行比较：它将始终评估为'false。我认为VS 2013 C＃编译器将允许这样的比较进行编译而不使用警告是一个缺陷（如果你使用ReSharper，ReSharper会发出警告）。



正如Karthik所示（上图）你可以比较th的值e使用标准相等运算符直接使用相同的枚举类型==或！=



如果类的实例具有Field或属性，其类型为一个特定的枚举类型，当然你可以将它与同一类型的枚举值进行比较;如果一个方法返回一个枚举值，你可以与之比较。



如果你想比较枚举值你可以使用.Equals：

If you compare an instance of a Class with an Enum Value using .Equals: it will always evaluate to 'false. I think the fact that the VS 2013 C# compiler will allow such a comparison to compile without a warning is a flaw (if you are using ReSharper, ReSharper will put up a warning).

As Karthik demonstrated (above) you can compare Values of the same Enum Type directly using the standard equality operators "==" or "!="

If an instance of a Class has a Field, or Property whose Type is a specific Enum Type, of course you can compare that with an Enum Value of the same Type; if a method returns an Enum Value, you can compare with that.

You can use .Equals if you wish to compare Enum Values:

bool testEquals = SomeClassInstance.TheBus.Equals(Buses.green);

有效。但是，为什么在使用普通的相等运算符更简单时使用呢？

Is valid. But, why use that when it's simpler to just use the ordinary equality operators ?

是的你可以使用它..



简单的方法是

Yes u can use it..

simple way is

if ((CANMsgIdList[f].Bus)!=(ConsoleApplication13.Buses.CANBusGreen))

看看这个

c-sharp-difference-between-and-equals [ ^ ]

这篇关于如何在代码中使用.Equals的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！