公共重写字符串ToString()? [英] public override string ToString()?

问题描述

namespace CSharp_Accessors
{
    class Person
    {
        private string myName = "N/a";  // Private string, cannot be accessed directly:
        private int    myAge  = 0;       // Private Integer, cannot be accessed directly:

        public string Name
        {
            get { return myName; }     // This is an Accessor, is used to access private identifiers:
            set { myName = value; }     // In this case the private identifier is [myName]:
        }

        public int Age
        {
            get { return myAge; }      // This is an Accessor, is used to access private identifiers:
            set { myAge = value; }     // In this case the private identifier is [myAge]:
        }

        public override string ToString()                   //
        {                                                   // I dont understand how this is access or why this function is read without nay name given to it.
            return "Name = " + Name + ", Age = " + Age;     //
        }

        static void Main(string[] args)
        {
            Console.WriteLine("Simple Properties");

            // Create a new Person object:
            Person Person = new Person();

            // Print out the name and the age associated with the person:
            Console.WriteLine("Person details - {0}", Person);

            // Set some values on the person object:
            Person.Name = "Joe Beef";
            Person.Age = 42;
            Console.WriteLine("Person details - {0}", Person);

            // Increment the Age property:
            Person.Age += 1;
            Console.WriteLine("Person details - {0}", Person);

            // Pause screen
            Console.ReadKey();
        }
    }
}

我不明白当该块没有名称关联或未调用时如何调用该块.

---

I dont understand how this block called when it doesnt have a name associated with it nor has it been called.

---

public override string ToString()                   //
        {                                                   // I dont understand how this is access or why this function is read without nay name given to it.
            return "Name = " + Name + ", Age = " + Age;     //
        }

---

我正在阅读位于以下位置的教程:

属性或访问器

---

I was reading the tutorial found at:

Properties or Accessors

推荐答案

Console.WriteLine("Person details - {0}", Person);使用ToString()方法.
当您重写此方法时(如您在类中所做的那样)，将调用此重写方法.

如果没有，则将调用默认的ToString方法.

如何:覆盖ToString方法 [ ^ ]可能会给您有关此问题的更多见解.

Console.WriteLine("Person details - {0}", Person); uses the ToString() method.
When you override this (as is done in your class), this overriden method is called.

If not, the default ToString method would have been called.

How To: Override the ToString Method [^] might give you some more insight into this issue.

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