What is the use of a partial class?

Question

How can a partial class be useful in coding? Can anyone explain the examples in detail?

Answer 1

The main use is to separate the code created by the designer (for example, the user interface or entities) from the handwritten code; two of them are aligned together at compile time, so you still just get one class, but you don’t see how the designer spins when viewing the code.

This is not the only useful situation, but it is the main one that I encountered.

Answer 2

• When working on large projects, distributing the class into separate files allows you to work with several programmers at the same time.
• When working with automatically generated source code, you can add code to the class without having to recreate the source file. Visual Studio takes this approach when creating Windows Forms, web services, shell code, etc. You can create code that uses these classes without having to edit the file created by Visual Studio.

Source msdn .

Look at the link.

Answer 3

The most common example is code generation. WinForms Designer, like Visual Studio 2005, does this. It allows you to generate code in one file, while your manual code remains in another file. They are glued together at the end by the compiler.

Answer 4

Partial classes are very useful in scenarios when two or more developers work on the same class. If the class is not partial, then only one developer can work on the class at a time. But in the case of partial classes, you can create multiple files with the same class name (fully qualified name).

Partial classes are declared as follows.

public partial class MyFirstPartialClass { } 

Answer 5

I saw people who used partial classes to split too large classes into separate files, where the best solution would be to split the class into several separate classes.

I see it as an anti-pattern for using partial classes to separate handwritten classes into separate files.

Answer 6

In addition to the post by @Jon: it provides you with the ability to destroy the same class among different files. So, for example, different developers can work on one big class without jumping into conflicts in any version control system.

We often used it, in the case of large classes, Bascially Facades, to leave the development team to "breathe."

Sincerely.

Answer 7

It can help you.

http://www.4guysfromrolla.com/articles/071509-1.aspx

Answer 8

A partial class is used if you want to define a class over one or more files.

This is typically used to separate code that generates a user interface from code that contains user interface logic. C # does this, for example.

Sometimes, when I have a huge class that cannot be broken up in other ways, I used partial classes to separate groups of methods, although I do this very rarely.

Answer 9

Another use: if you have a giant tab control with many tabs that you want to split into one tab code per file, you can do this using partial tabs.

Answer 10

A partial class is fully utilized when multiple users are working on the same class, so the partial keyword is used. but when the compiler compiles the code, it combines all partial classes with the same name into one class. If he reacts as one class.