为什么我们需要 C# 中的属性 [英] Why we need Properties in C#

问题描述

你能告诉我 C# 中属性的确切用法是什么吗?我的意思是实用的解释

Can you tell me what is the exact usage of properties in C# i mean practical explanation

在我们的项目中，我们使用了像

in our project we are using properties like

/// <summary>
/// column order
/// </summary>
protected int m_order;

/// <summary>
/// Get/Set column order
/// </summary>
public int Order
{
   get { return m_order; }
   set { m_order = value; }
}

/// <summary>
/// constructor
/// </summary>
/// <param name="name">column name</param>
/// <param name="width">column width</param>
/// <param name="order">column order</param>
public ViewColumn(string name, int width, int order)
{
   //
   // TODO: Add constructor logic here
   //
   m_name = name;
   m_width = width;
   m_order = order;
}  


/// <summary>
/// returns the column name, width, and order in list view.
/// </summary>
/// <returns>string represent of the ViewColumn object</returns>
public override string ToString()
{
  return (string.Format("column name = {0}, width = {1}, order = {2}.", 
        m_name, m_width, m_order));
}

/// <summary>
/// Do a comparison of 2 ViewColumn object to see if they're identical.
/// </summary>
/// <param name="vc">ViewColumn object for comparison</param>
/// <returns>True if the objects are identical, False otherwise.</returns>
public override bool Equals(object obj)
{
   ViewColumn vc = (ViewColumn)obj;
   if(m_name == vc.Name &&
        m_width == vc.Width &&
        m_order == vc.Order)
      return true;
   else
      return false;
}

推荐答案

想一想:你有一个房间，你想控制谁可以进来，以保持该房间的内部一致性和安全性，这是你不想要的任何人进来把它搞砸，然后像什么也没发生一样离开.所以那个房间将是您的实例化类，而属性将是人们用来进入房间的门.您对属性的 setter 和 getter 进行适当的检查，以确保任何意外的事情进出.

Think about it : You have a room for which you want to regulate who can come in to keep the internal consistency and security of that room as you would not want anyone to come in and mess it up and leave it like nothing happened. So that room would be your instantiated class and properties would be the doors people come use to get into the room. You make proper checks in the setters and getters of your properties to make sure any unexpected things come in and leave.

更多技术答案是封装，您可以查看此答案以获取更多信息:https://stackoverflow.com/a/1523556/44852

More technical answer would be encapsulation and you can check this answer to get more information on that: https://stackoverflow.com/a/1523556/44852

class Room {
   public string sectionOne;
   public string sectionTwo;
}

Room r = new Room();
r.sectionOne = "enter";

人们很容易进入 sectionOne，没有任何检查.

People is getting in to sectionOne pretty easily, there wasn't any checking.

class Room 
{
   private string sectionOne;
   private string sectionTwo;

   public string SectionOne 
   {
      get 
      {
        return sectionOne; 
      }
      set 
      { 
        sectionOne = Check(value); 
      }
   }
}

Room r = new Room();
r.SectionOne = "enter";

现在你检查了这个人，知道他是否有什么邪恶的东西.

now you checked the person and know about whether he has something evil with him.

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