C# 3.0新特性之自动属性(Auto-Implemented Properties)
万丈高楼平地起，基础是重中之重。
所有我一定要搞点基础的东西，虽然已经是搞了几年程序了，有些基础知识也懂，但是没有系统的掌握。
而且发现现在弄的B/S系统里很多技术真的很落后了，也许我现在学的新技术有些用不上，并不代表不要学，
所有现在开始更加要全部重新学习或者复习一些基础东西。
1.C# 3.0新特性之自动属性(Auto-Implemented Properties)
类的定义
public class Point
{
private int x;
private int y;
public int X { get { return x; } set { x = value; } }
public int Y { get { return y; } set { y = value; } }
}
与下面这样定义等价，这就是c#新的特性
public class Point
{
public int X {get; set;}
public int Y {get; set;}
}
一个例子源码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace NewLanguageFeatures1
{
public class Customer
{
public int CustomerId { get; private set; }
public string Name { get; set; }
public string City { get; set; }
public override string ToString()
{
return Name + "\t" + City + "\t" + CustomerId;
}
}
class Program
{
static void Main(string[] args)
{
Customer c = new Customer();
c.Name = "Alex Roland";
c.City = "Berlin";
c.CustomerId = 1;
Console.WriteLine(c);
}
}
}
错误 1 由于 set 访问器不可访问，因此不能在此上下文中使用属性或索引器“NewLanguageFeatures1.Customer.CustomerId” D:\net\NewLanguageFeatures\NewLanguageFeatures1\Program.cs 41 13 NewLanguageFeatures1
Program output showing the result of calling ToString on the Customer class after adding a new CustomerId property
正确的例子源码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace NewLanguageFeatures
{
public class Customer
{
public int CustomerId { get; private set; }
public string Name { get; set; }
public string City { get; set; }
public Customer(int Id)
{
CustomerId = Id;
}
public override string ToString()
{
return Name + "\t" + City + "\t" + CustomerId;
}
}
class Program
{
static void Main(string[] args)
{
Customer c = new Customer(1);
c.Name = "Alex Roland";
c.City = "Berlin";
Console.WriteLine(c);
}
}
}
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