如何在C#中重载方括号运算符?

你可以找到怎么做 here .

public object this[int i]
{
    get { return InnerList[i]; }
    set { InnerList[i] = value; }
}

如果您只需要一个getter,那么 answer below

这将是项属性: http://msdn.microsoft.com/en-us/library/0ebtbkkc.aspx

public T Item[int index, int y]
{ 
    //Then do whatever you need to return/set here.
    get; set; 
}

Operators                           Overloadability

+, -, *, /, %, &, |, <<, >>         All C# binary operators can be overloaded.

+, -, !,  ~, ++, --, true, false    All C# unary operators can be overloaded.

==, !=, <, >, <= , >=               All relational operators can be overloaded, 
                                    but only as pairs.

&&, ||                  They can't be overloaded

() (Conversion operator)        They can't be overloaded

+=, -=, *=, /=, %=                  These compound assignment operators can be 
                                    overloaded. But in C#, these operators are
                                    automatically overloaded when the respective
                                    binary operator is overloaded.

=, . , ?:, ->, new, is, as, sizeof  These operators can't be overloaded

    [ ]                             Can be overloaded but not always!

Source of the information

括号:

public Object this[int index]
{

}

不能超载 ; 但是,类型可以定义索引器,即接受一个或多个参数的属性。索引器参数用方括号括起来,就像数组索引一样,但索引器参数可以声明为任何类型(与数组索引不同,数组索引必须是整数)。

MSDN

如果您使用的是C#6或更高版本,则可以对仅获取索引器使用表达式体语法:

public object this[int i] => this.InnerList[i];

public class CustomCollection : List<Object>
{
    public Object this[int index]
    {
        // ...
    }
}

this MSDN link .

简言之,属性可以命名为“default”:

ref class Class
{
 public:
  property System::String^ default[int i]
  {
    System::String^ get(int i) { return "hello world"; }
  }
};

  public object this[int index]
  {
     get { return ( List[index] ); }
     set { List[index] = value; }
  }

如果您指的是数组索引器,则只需编写索引器属性即可重载它。。而且,只要索引器属性具有不同的参数签名,就可以重载(写入任意数量的)索引器属性

public class EmployeeCollection: List<Employee>
{
    public Employee this[int employeeId]
    {   
        get 
        { 
            foreach(var emp in this)
            {
                if (emp.EmployeeId == employeeId)
                    return emp;
            }

            return null;
        }
    }

    public Employee this[string employeeName]
    {   
        get 
        { 
            foreach(var emp in this)
            {
                if (emp.Name == employeeName)
                    return emp;
            }

            return null;
        }
    }
}