如何在C＃中调用getter或setter

Question

I understand how to create a getters and setters

public myClass
{
    public int myVal { get; set; }

    // more stuff
}

but I don't understand how to call it later on.

public myOtherClass
{
    public myOtherClass()
    {
         myClass localMyClass = new myClass();

         localMyClass.???set??? = 42;  
         // Intelisense doesn't seem to give any obvious options after I enter 
         // the period.
    }
}

How should I set the value of myVal in localMyClass?

Answer 1

localMyClass.myVal = 42;

Getters and setters let you treat the values like public properties. The difference is, you can do whatever you want inside the functions that do the getting and setting.

Examples:

store other variables

private int _myVal, myOtherVal;
public int MyVal { get; set { _myVal = value; myOtherVal++; } }

make numbers up / return constants

public int MyVal { get { return 99; } set; }

throw away the setter

private int _myVal;
public int MyVal { get { return _myVal; } set { ; } }

In each of these cases, the user will feel like it's just a public data member, and simply type

localMyClass.myVal = 42;
int i = localMyClass.myVal;

The gettors and settors let you make an implementation of your own. Also, as Hogan says, "There are a number of libraries and add-ons [eg MVC.NET] that require you to use getter and setter functions" - even if it's for the trivial {get; set;} {get; set;} case.

Answer 2

Set:

localMyClass.myVal = 42

Get:

int variable = localMyClass.myVal;

Answer 3

From the outside, the syntax for accessing getters and setters is indistinguishable from that of accessing variables. Assignments translate into calls of setters, while plain expression uses translate into calls of getters.

In intellisense, the list of getters and setters should open upon placing a dot . after the variable name. Properties should have blue markers to the left of them (as opposed to magenta-colored markers to the left of methods).

Answer 4

You want this

localMyClass.myVal = 42;  

to call the setter

and this

varName = localMyClass.myVal;

to call the getter.

Answer 5

Get: var tmp = localMyClass.myVal;

Set: localMyClass.myVal = 2;