[英]Custom auto properties in C#
I have the following class with auto properties: 我有以下类与自动属性:
class Coordinates
{
public Coordinates(int x, int y)
{
X = x * 10;
Y = y * 10;
}
public int X { get; set; }
public int Y { get; set; }
}
As you can see from the constructor I need the value to be multiplied by 10. Is there anyway to do it without removing autoproperties? 从构造函数中可以看出,我需要将值乘以10.无论如何都要在不删除autoproperties的情况下执行此操作吗?
I tried the following not thinking that it causes recursion and then everything goes fubar 我尝试了以下不认为它导致递归,然后一切都变得富有
public int X { get {return X;} set{ X *= 10;} }
I would like to assign values to X and Y multiplied by 10. 我想将值分配给X和Y乘以10。
Coordinates coords = new Coordinates(5, 6); // coords.X = 50 coords.Y = 60
coords.X = 7; // this gives 7 to X but I would like it to be 70.
In order to make setter working like that, you'll need to use backing field: 为了使setter像这样工作,你需要使用支持字段:
class Coordinates
{
public Coordinates(int x, int y)
{
X = x;
Y = y;
}
private int _x;
public int X
{
get { return _x; }
set { _x = value * 10; }
}
private int _y;
public int Y
{
get { return _y; }
set { _y = value * 10; }
}
}
Given your example: 举个例子:
Coordinates coords = new Coordinates(5, 6); // coords.X = 50 coords.Y = 60
coords.X = 7; // this gives 70
However, I don't recommend you having such setter because it could lead to confusion. 但是,我不建议你有这样的二传手,因为它可能导致混乱。 It's better to have a dedicated method which will do such multiplication. 最好有一个专用的方法来进行这样的乘法运算。 In the end, your code will be more descriptive and intuitive. 最后,您的代码将更具描述性和直观性。
You get a recursion, because you again call the same property, which in turn calls the same property, which in turn calls the same property... you get the point. 你得到一个递归,因为你再次调用相同的属性,而后者又调用相同的属性,而后者又调用相同的属性......你明白了。
public int X { get {return X ;} set{ X *= 10;} } public int X {get {return X ;} set { X * = 10;}}
How does auto properties works ? 汽车物业如何运作?
Behind the scenes Properties are actually methods, which means they don't actually store data. 幕后属性实际上是方法,这意味着它们实际上并不存储数据。 So who saves the data ? 那么谁保存数据? AutoProperties generate private backend field to save the data. AutoProperties生成私有后端字段以保存数据。
So in the simple declaration of auto property 所以在简单的auto属性声明中
int X { get; set; }
The compiler translate it into something like that 编译器将其转换为类似的东西
private int <X>k__BackingField;
public int X
{
[CompilerGenerated]
get
{
return <X>k__BackingField;
}
[CompilerGenerated]
set
{
<X>k__BackingField = value;
}
}
So no matter if you use it as Auto Properties or simple property, they are the same. 因此,无论您将其用作自动属性还是简单属性,它们都是相同的。
Now, to answer you question, with paraphrasing, "How do i return the value multiply with 10" 现在,回答你的问题,用释义,“我如何将价值乘以10乘以”
You can solve it with using 2 ways: 1. By saving the data multiply by 10 (setter implementation) 2. By returning the data multiply by 10 (getter implementation) 您可以使用以下两种方式解决它:1。将数据乘以10(setter实现)2。将数据乘以10(getter实现)
I won't elavorate, which one you should use, because for this kind of simple scenario, both will be perfectly valid. 我不会详细说明你应该使用哪一个,因为对于这种简单的场景,两者都是完全有效的。 I would just say that some of the factors for the choice will be micro(micro micro micro) performence, true state storage. 我只想说,选择的一些因素将是微观(微观微观)性能,真正的状态存储。
Here is the setter implementation 这是setter实现
private int _x;
public int X
{
get
{
return _x;
}
set
{
return _x*10;
}
}
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