如何在C＃中使用class属性？ [英] How to use the class property in C#?

问题描述

我很擅长.NET并学习这些东西。我有一个来自相机库的类，它在我们调用下面的GetValue（）方法时给出属性值。

I'm pretty new to .NET and learning the things. I have a class from a camera library which gives the property value when we call GetValue() method as below.

camera.Parameters[PLCamera.Width].GetValue();

我不确定这是如何工作的。两个方括号中给出的 PLCamera.Width 是枚举吗？本声明中基本上发生了什么？当我看到 PLCamera 类时，它有许多这样的属性。我想创建一个公共函数，它给出了作为参数给出的任何属性。



我尝试了什么：



我试过代码 camera.Parameters [PLCamera.Width] .GetValue（）; 并获得 PLCamera.Width 。我想知道这基本上是如何工作的？



CHM图书馆文档可以在 Pylon - 找到Google云端硬盘 [ ^ ]

I'm unsure how does that work. Is that PLCamera.Width given in two square braces is an enum? What essentially happening in this statement? When I saw PLCamera class, it has numerous such properties. I want to create a public function which gives any property given as argument.

What I have tried:

I have tried the code camera.Parameters[PLCamera.Width].GetValue(); and it gets the PLCamera.Width. I want to know how this essentially works?

CHM library doc can be found at Pylon - Google Drive[^]

推荐答案

没有看源代码 - 我假设你可以做，但我没有下载 - 我会认为camera.Parameters是一个数组或一个字典，所以广场里面的值括号求值为整数（因此可以是枚举）或不同的类型，如字符串。

PLCamera不太可能是枚举，因为没有从枚举到int的隐式转换，所以它更可能是const int值的类/结构，或者参数是字典。



对于字典，它可能是这样的：

Without looking at the source code - which I assume you can do, but I don't which to download - I would assume that camera.Parameters is an array or a Dictionary, so the value inside the square brackets evaluates to an integer (and thus could be a enum) or a different type, like a string.
It's unlikely that PLCamera is an enum, as there is no implicit conversion from an enum to an int, so it's more likely that it's a class / struct of const int values, or Parameters is a Dictionary.

For a dictionary, it could be something like this:

public static class PLCamera
    {
    public static const string Width = "Width";
    ...
    }
public class ParameterBlock
    {
    public int GetValue() { return 0; }
    ...
    }
private Dictionary<string, ParameterBlock> Parameters = new Dictionary<string, ParameterBlock>();
...
    int x = Parameters[PLCamera.Width].GetValue();

如果它是枚举，则可以这样做：

If it's an enum, then it could be done like this:

private  Dictionary<PLCamera, ParameterBlock> Parameters = new Dictionary<PLCamera, ParameterBlock>();
...
    int x = Parameters[PLCamera.Width].GetValue();

这篇关于如何在C＃中使用class属性？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！