How many times have you used this in C? [Example with source code]

In C #, how many times have you used this? The following are my summary of the usage of this. You are welcome to refer to the usage and related code.

 

This usage 1: Restrict hidden members with similar names
　　

/// <Summary>

////************************************ ******/

/// * This usage 1: Restrict hidden members with similar names */

////************************************ ******/

/// </Summary>

/// <Param name = "Name"> </param>

Public Person (string Name, string Sex)

{

This. Name = Name;

This. Sex = Sex;

}

 

 

This usage 2: passing objects as parameters to other methods

/// <Summary>

/// Summary of Person

/// </Summary>

Public class Person

{

/// <Summary>

/// Name

/// </Summary>

Public string Name {set; get ;}

/// <Summary>

////************************************ *******/

/// * This usage 2: passing an object as a parameter to another method */

////************************************ *******/

/// </Summary>

Public void ShowName ()

{

Helper. PrintName (this );

}

}

/// <Summary>

/// Auxiliary class

/// </Summary>

Public static class Helper

{

/// <Summary>

/// Print the person name

/// </Summary>

/// <Param name = "person"> </param>

Public static void PrintName (Person person)

{

HttpContext. Current. Response. Write ("Name:" + person. Name + "<br/> ");

}

}

 

 

This usage 3: declare the Indexer

/// <Summary>

/// Other attributes

/// </Summary>

Public NameValueCollection Attr = new NameValueCollection ();

 

/// <Summary>

////*************************/

/// * This usage 3: declare the indexer */

////*************************/

/// </Summary>

/// <Param name = "key"> </param>

/// <Returns> </returns>

Public string this [string key]

{

Set

{

Attr [key] = value;

}

 

Get

{

Return Attr [key];

}

}

 

 

This usage 4: Method of extending objects
/// <Summary>

/// Summary of Person

/// </Summary>

Public class Person

{// <Summary>

/// Gender

/// </Summary>

Public string Sex {set; get ;}

}

/// <Summary>

/// Auxiliary class

/// </Summary>

Public static class Helper

{

/// <Summary>

////*****************************/

/// * This usage 4: Method of extending the object */

////*****************************/

/// </Summary>

/// <Param name = "item"> </param>

/// <Returns> </returns>

Public static string GetSex (this Person item)

{

Return item. Sex;

}

}

Call:

Person person = new Person ();

Person. GetSex ();

 

 

The complete code is as follows:

Show sourceusing System;

Using System. Collections. Generic;

Using System. Web;

Using System. Collections;

Using System. Collections. Specialized;

/// <Summary>

/// Summary of Person

/// </Summary>

Public class Person

{

/// <Summary>

/// Name

/// </Summary>

Public string Name {set; get ;}

/// <Summary>

/// Gender

/// </Summary>

Public string Sex {set; get ;}

/// <Summary>

/// Other attributes

/// </Summary>

Public NameValueCollection Attr = new NameValueCollection ();

Public Person ()

{

}

/// <Summary>

////************************************ ******/

/// * This usage 1: Restrict hidden members with similar names */

////************************************ ******/

/// </Summary>

/// <Param name = "Name"> </param>

Public Person (string Name, string Sex)

{

This. Name = Name;

This. Sex = Sex;

}

/// <Summary>

////************************************ *******/

/// * This usage 2: passing an object as a parameter to another method */

////************************************ *******/

/// </Summary>

Public void ShowName ()

{

Helper. PrintName (this );

}

/// <Summary>

////*************************/

/// * This usage 3: declare the indexer */

////*************************/

/// </Summary>

/// <Param name = "key"> </param>

/// <Returns> </returns>

Public string this [string key]

{

Set

{

Attr [key] = value;

}

Get

{

Return Attr [key];

}

}

}

/// <Summary>

/// Auxiliary class

/// </Summary>

Public static class Helper

{

/// <Summary>

////*****************************/

/// * This usage 4: Method of extending the object */

////*****************************/

/// </Summary>

/// <Param name = "item"> </param>

/// <Returns> </returns>

Public static string GetSex (this Person item)

{

Return item. Sex;

}

/// <Summary>

/// Print the person name

/// </Summary>

/// <Param name = "person"> </param>

Public static void PrintName (Person person)

{

HttpContext. Current. Response. Write ("Name:" + person. Name + "<br/> ");

}

}

Call example:

Show source // this usage 1 Example

Person person = new Person ("", "");

 

// This usage 2 example

Person. ShowName ();

 

// Example 3 of this usage

Person ["Height"] = "175 ";

Response. Write ("Height:" + person ["Height"] + "<br/> ");

Person ["Weight"] = "110 ";

Response. Write ("Weight:" + person ["Weight"] + "<br/> ");

 

// This usage 4 example

Response. Write ("Gender:" + person. GetSex () + "<br/> ");

 

 

Due to the time relationship, we will not talk too much. If there are any shortcomings, please criticize and correct them.

Complete example source code download: http://www.bkjia.com/uploadfile/2011/1013/20111013110305836.rar
Excerpt from: sporadic incidents