如何在ASP.NET C＃中使用get和set？ [英] How to use get and set in ASP.NET C# ?

问题描述

嘿伙计们，



我在这里得到了这个代码：

  private   string  _firstName; 
 
 
  public   string  FirstName 
 {
  get  { return  _firstName; } 
  set  {_ firstName =  value ; } 
 
} 

但我不知道它是如何工作的我试图玩它。我假设这意味着如果我在名为_firstName的私有对象中放置一个值，我可以在公共对象FirstName中使用它，即使它是私有的。



任何人？

解决方案

私有字符串是在代码中执行FirstName =....时设置的后备字段。实际上发生的是这段代码转换为隐藏的集合调用（这是编译器在表面下所做的）。伪逻辑如下所示：

  public   void  FirstName_Set（ string   value ）
 {
 _firstName = 值; 
} 

通过这样做，我们确保从外部类隐藏_firstName（我们封装它）。当然，如果你所做的只是设置一个简单的值，而你没有做任何类似序列化或更复杂的验证形式，那么你可能只需要

  public   string  FirstName; 

请阅读这些..



c＃中的封装 [< a href =http://msdn.microsoft.com/en-us/library/dd460654.aspxtarget =_ blanktitle =New Window> ^ ]

封装oops [ ^ ]

http://www.dotnetperls.com/encapsulate-field [ ^ ]

Hey guys,

I got this code here:

private string _firstName;


    public string FirstName
    {
        get { return _firstName; }
        set { _firstName = value; }

    }

But i don't get how it work I tried to play around with it. I'm assuming that it means if I put a value in the private object named _firstName I can use it inside the public object FirstName even if it's private.

Anyone?

解决方案

The private string is a backing field that is set when you do FirstName = "...." in your code. Effectively what happens is that this code translates into a hidden set call (that's what the compiler does under the surface). The pseudo-logic looks like this:

public void FirstName_Set(string value)
{
  _firstName = value;
}

By doing this, we ensure that _firstName is hidden from outside classes (we encapsulate it). Of course, if all you are doing is setting a simple value and you aren't doing anything like serialization or more complex forms of validation, then you might as well just have

public string FirstName;

Please read these..

Encapsulation in c#[^]
Encapsulation oops[^]
http://www.dotnetperls.com/encapsulate-field[^]

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