"this" keword in C#

Sreekanth Reddy

9y1.7kLearn iOS Programming

Can we use this keyword in C# ?

If no, why can't we use ?

10 Replies

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Gnanavel Sekar9y ago
Accepted answer
@Srikanth Reddy
Can we use this keyword in static method?

The answer is no because static method does not need any object to be called, and this keyword always point to a current object of a class.

simply if there is no object then how the keyword point to any current object so,we cannot use this keyword here.

But there is a situation where we can use this keyword in static method, that is EXTENSION METHOD.

what is extension method?

It is a new approach or concept that has been added in C#3.0 version which allows to add new methods in an existing class without editing the source of the class.
we can use this method mainly to extend the functionality of an existing class.

In extension methods new methods can be added to an existing class without editing the source code of a class, by first defining those methods under a static class and then bind them with the class we require.
3. The first parameter of an extension method must be the name of the class prefixed with this keyword to which the method has to be added, and this parameter is referred as binding parameter which will not be taken into consideration while invoking the method.

for more refer below link
http://www.c-sharpcorner.com/blogs/how-to-use-this-keyword-in-static-method1
https://msdn.microsoft.com/en-us/library/dk1507sz(VS.71).aspx
+1
Sandip G Patil9y ago
Yes we can use it..
0
Harisankar Angamuthu9y ago
Answer to Your Question: No, Static types cannot be used as return types
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Gnanavel Sekar9y ago
YES we can use "this" keyword in c#

There are several usages of this keyword in C#.
To qualify members hidden by similar name
To have an object pass itself as a parameter to other methods
To have an object return itself from a method
To declare indexers
To declare extension methods
To pass parameters between constructors
To internally reassign value type (struct) value.
To invoke an extension method on the current instance
To cast itself to another type
To chain constructors defined in the same class
You can avoid the first usage by not having member and local variables with the same name in scope, for example by following common naming conventions and using properties (Pascal case) instead of fields (camel case) to avoid colliding with local variables (also camel case). In C# 3.0 fields can be converted to properties easily by using auto-implemented properties.

refer below links for more details

http://stackoverflow.com/questions/23250/when-do-you-use-the-this-keyword

http://www.c-sharpcorner.com/UploadFile/891f80/this-keyword-in-C-Sharp/
+2

Paul Rajs9y ago

51down voteaccepted

Because this refers to the object instance. There is no object instance in a call of a static method. But of course you can access your static field (only the static ones!). Just use

class Sub { static int y; public static void foo() {          y = 10; } }

If you want to make sure you get the static field y and not some local variable with the same name, use the class name to specify:

class Sub { static int y; public static void foo(int y) { Sub.y = y; } }

hope this will help you

Sreekanth Reddy9y ago
Sorry friends, My question is about using this keyword inside static methods.
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Sreekanth Reddy9y ago
@paul Rajs :
What do you mean by the term implictly defined ?
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Jitendra Shekhawat9y ago
http://www.c-sharpcorner.com/UploadFile/891f80/this-keyword-in-C-Sharp/

https://www.codeproject.com/Questions/563428/whatplusisplustheplusmeaningplusofplus-this-pl

http://www.c-sharpcorner.com/UploadFile/puranindia/this-keyword-in-C-Sharp/
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Suvendu Shekhar Giri9y ago
Yes.. we can use "this" keyword in c#.
What exactly is your requirement?
Have you searched this in google?
0
Paul Rajs9y ago
yes of Course we can use this keyword in c#

"this" Keyword in C# The "this" keyword is a special type of reference variable, that is implicitly defined within each constructor and non-static method as a first parameter of the type class in which it is defined.

we can use this keyword mainly as creating Constructor in c#
public Employee(string name, string alias) { // Use this to qualify the fields, name and alias: this.name = name; this.alias = alias; }
hope this will help you
Paul.S
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