我可以在 C# 中获取对象的名称吗？
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Can I get the name of my object in C#?
提问by rock
Let us say I have the following class..
假设我有以下课程..
Class Boy
{
public void hello()
{
Console.WriteLine("Hello!");
}
static void Main(String[] args)
{
Boy a = new Boy();
a.hello();
}
}
I know that the variable 'a'is a reference variable of type 'Boy'. The keyword 'new'created an object of 'Boy'assigning the address of it to the variable 'a'.
我知道变量'a'是'Boy'类型的引用变量。关键字'new'创建了一个'Boy'的对象，并将其地址分配给变量'a'。
Now, is it possible for me to get the name of my object. Does an object in C# have a name at all ?
现在，我是否有可能获得我的对象的名称。C# 中的对象到底有没有名字？
采纳答案by Marc Gravell
I'm guessing you are referring to the name of the variable, "a". Well, the thing is: that isn'tthe name of the object - objects don't have names. Further, an object can have zero one or multiple references to it, for example:
我猜你指的是变量的名称，“a”。好吧，问题是：那不是对象的名称——对象没有名称。此外，一个对象可以有零个或多个引用，例如：
var x = new SomeType(); // a class
var y = x;
Here both x and y refer to the same object. Equally:
这里 x 和 y 指的是同一个对象。一样：
new SomeType();
doesn't have any references to it, but is still an object. Additionally, method variables (locals) don't actually have names in IL - only in c# (for contrast, fields do have names). So new SomeType().WriteName();would make no sense.
没有对它的任何引用，但仍然是一个对象。此外，方法变量（局部变量）在 IL 中实际上没有名称 - 仅在 c# 中（相比之下，字段确实有名称）。所以new SomeType().WriteName();就没意思了。
So no: there is no sane way of getting the name of the variable from an object reference.
所以不：没有从对象引用中获取变量名称的理智方法。
If you want the object to have a name, add a Nameproperty.
如果您希望对象具有名称，请添加Name属性。
There are some fun ways to get the name of a variable of field using expression trees, but I don't think that is useful to what you are trying to do.
有一些有趣的方法可以使用表达式树获取字段变量的名称，但我认为这对您尝试做的事情没有用。
回答by adatapost
We don't have a name of objects. In fact object's reference is assigned to the referencevariable in order to access datavia public methods/properties. If you wish to have the reference of an object within the instancemethod of that particular class then use thisvariable.
我们没有对象的名称。事实上，对象的引用被分配给引用变量，以便通过公共方法/属性访问数据。如果您希望在该instance特定类的方法中拥有对象的引用，请使用this变量。
Class Boy
{
int age;
public void setAge(int age)
{
this.age = age;
}
}
回答by Navin Kumar
class Boy
{
public void hello()
{
Console.WriteLine("Hello!");
}
static void Main(String[] args)
{
Boy a = new Boy();
a.hello();
Type objtype = a.GetType();
Console.WriteLine(objtype.Name); // this will display "Boy"
}
}
