What is Partial class

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bb.geetha  

  • Member Since May-2008 | Jun 12th, 2008

A Partial class is a class that can be split into two or more classes. This means that a class can be physically separated into other parts of the class within the same namespace. All the parts must use the partial keyword. All the other classes should also have the same access modifier. At the compile time, all the partial classes will be treated as a single class. Let us list some advantages of having partial classes.

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Sohaib Ahmad

  • Sep 28th, 2006
 

The class which can be split into mulitple files in partial class.

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sriraja

  • Nov 19th, 2006
 

 A class having splited into different files ex.. program.cs(application.run),form related files,class related files

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don22222000

  • Jul 13th, 2007
 

In ASP.Net, Partial Class is the common class that links the Presentation layer to the Code behind page. Its basically an inheritance class.

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bornToLose

  • Sep 22nd, 2007
 

It is possible to split class, struct and interface into multiple source file. Each file contain section of class definition and combined all file at time of compilation.  It is used when:
1. Program is very large
2. Automatic generate source code

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bb.geetha

  • Jun 12th, 2008
 

A Partial class is a class that can be split into two or more classes. This means that a class can be physically separated into other parts of the class within the same namespace. All the parts must use the partial keyword. All the other classes should also have the same access modifier. At the compile time, all the partial classes will be treated as a single class. Let us list some advantages of having partial classes.

hellodebasish

  • May 22nd, 2009
 

The class having partial keyword and same name. One class can split into more than two parts having same name and partial keyword. In the time of object creation all partial class group together to make the single object.

The main aim for the partial class is that giving more liberty to the developer, different developer can work on same class without interpreting to each other.

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lata negi

  • Nov 4th, 2011
 

Partial class is a new feature added to .NET Framework 2.0. .NET 1.0 or 1.1, does not support for partial classes.
It is possible to split the definition of a class or a struct, or an interface over two or more source files. Each source file contains a section of the class definition, and all parts are combined when the application is compiled.

When working on large projects, spreading a class over separate files allows multiple programmers to work on it simultaneously.

Points to be noted while writing code for partial classes:-

All the partial definitions must proceeded with the key word "Partial".

All the partial types meant to be the part of same type must be defined within a same assembly and module.
Method signatures (return type, name of the method, and parameters) must be unique for the aggregated typed (which was defined partially).

The partial types must have the same accessibility.
If any part is sealed, the entire class is sealed.
If any part is abstract, the entire class is abstract.
Inheritance at any partial type applies to the entire class.

nikhiljain27

  • Jul 13th, 2013
 

Two or more different class having the same name and datatype but physically different from each other. At compile time all the partial class are complied in to one single entity(class) and all the methods, properties defined in different classes are available by creating the object of that class.

It is useful when multiple developers worked on the same class at the same time.

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