Intractable -- Indexer

 

When a class contains arrays or set members, you can use the indexer to greatly simplify access to arrays or set members.

The usage is as follows:

 
[Modifier] Data TypeThis[Index]

{

Get{//Obtain the attributeCode}

Set{//Code for setting attributes}

}

//Modifiers include public, protected, Private, internal, new, virtual, sealed, override, abstract, and extern.
//The data type is the type of the array or set element to be accessed.
 

For example, the following is a class where the indexer is used:

    Public   Class Myclass {
 Public   String Name { Get ; Set ;}
 Public   Int Age { Get ; Set ;}
 Public   String [] Arr = New   String [ 10 ];

 //  Outside the class, you can use myclass [Param] to access the value of the string array arr [Param] In myclass.  
          Public   String   This [ Int Param] {
 Get { Return Arr [Param];}
 Set {Arr [Param] = value ;}
}
}

The following describes how to store a string to the 0th elements of the array member ARR in the class through the indexer:

 
//Accessing myclass [Index] is equivalent to accessing the array arr [Index] In myclass.
Myclass =NewMyclass ();
Myclass [0] ="Johnsmith";
Console. writeline (myclass. Arr [0]);
 

For more information, see index in C #.