1. Simple Factory (Simple Factory) mode
Simple Factory mode returns an instance of one of several possible classes based on the data provided to it. Usually the class it returns has a common parent class and public methods.
Simple Factory pattern is not actually one of the 23 design patterns in GoF.
2. Simple Factory pattern roles and structures:
Factory class role Creator (LightSimpleFactory): The factory class creates product objects under the direct control of the client (Create method).
Abstract product role Product (Light): Defines the parent class of objects created by a simple factory or the interface they share. Can be a class, abstract class or interface.
Concrete product role ConcreteProduct (BulbLight, TubeLight): Define the specific objects processed by the factory.
3. Program example:
using System; public abstract class Light { public abstract void TurnOn(); public abstract void TurnOff(); } public class BulbLight : Light { public override void TurnOn() { Console.WriteLine("Bulb Light is Turned on"); } public override void TurnOff() { Console.WriteLine("Bulb Light is Turned off"); } } public class TubeLight : Light { public override void TurnOn() { Console.WriteLine("Tube Light is Turned on"); } public override void TurnOff() { Console.WriteLine("Tube Light is Turned off"); } } public class LightSimpleFactory { public Light Create(string LightType) { if(LightType == "Bulb") return new BulbLight(); else if(LightType == "Tube") return new TubeLight(); else return null; } } public class Client { public static void Main() { LightSimpleFactory lsf = new LightSimpleFactory(); Light l = lsf.Create("Bulb"); l.TurnOn(); l.TurnOff(); Console.WriteLine("-----------------"); l = lsf.Create("Tube"); l.TurnOn(); l.TurnOff(); } }
5. Advantages and disadvantages:
Advantages:
The factory class contains necessary judgment logic, which can decide when to create an instance of which product class. The client is relieved of the responsibility of creating product objects directly and merely "consumes" the product. The simple factory pattern achieves the separation of responsibilities through this approach.
Disadvantages:
When the product has a complex multi-layer hierarchical structure, the factory class only has itself, and it can adapt to changes in the same way, which is the shortcoming of the model. Because the factory class centralizes all product creation logic, once it fails to work properly, the entire system will be affected.
At the same time, it is difficult to expand the system. Once a new product is added, the factory logic has to be modified, which may cause the factory logic to be too complex.
In addition, the simple factory pattern usually uses static factory methods, which makes it impossible to be inherited by subclasses, causing the factory role to be unable to form a hierarchical structure based on inheritance.
The above is the detailed content of A brief explanation of C# factory pattern. For more information, please follow other related articles on the PHP Chinese website!

The combination of C# and .NET provides developers with a powerful programming environment. 1) C# supports polymorphism and asynchronous programming, 2) .NET provides cross-platform capabilities and concurrent processing mechanisms, which makes them widely used in desktop, web and mobile application development.

.NETFramework is a software framework, and C# is a programming language. 1..NETFramework provides libraries and services, supporting desktop, web and mobile application development. 2.C# is designed for .NETFramework and supports modern programming functions. 3..NETFramework manages code execution through CLR, and the C# code is compiled into IL and runs by CLR. 4. Use .NETFramework to quickly develop applications, and C# provides advanced functions such as LINQ. 5. Common errors include type conversion and asynchronous programming deadlocks. VisualStudio tools are required for debugging.

C# is a modern, object-oriented programming language developed by Microsoft, and .NET is a development framework provided by Microsoft. C# combines the performance of C and the simplicity of Java, and is suitable for building various applications. The .NET framework supports multiple languages, provides garbage collection mechanisms, and simplifies memory management.

C# and .NET runtime work closely together to empower developers to efficient, powerful and cross-platform development capabilities. 1) C# is a type-safe and object-oriented programming language designed to integrate seamlessly with the .NET framework. 2) The .NET runtime manages the execution of C# code, provides garbage collection, type safety and other services, and ensures efficient and cross-platform operation.

To start C#.NET development, you need to: 1. Understand the basic knowledge of C# and the core concepts of the .NET framework; 2. Master the basic concepts of variables, data types, control structures, functions and classes; 3. Learn advanced features of C#, such as LINQ and asynchronous programming; 4. Be familiar with debugging techniques and performance optimization methods for common errors. With these steps, you can gradually penetrate the world of C#.NET and write efficient applications.

The relationship between C# and .NET is inseparable, but they are not the same thing. C# is a programming language, while .NET is a development platform. C# is used to write code, compile into .NET's intermediate language (IL), and executed by the .NET runtime (CLR).

C#.NET is still important because it provides powerful tools and libraries that support multiple application development. 1) C# combines .NET framework to make development efficient and convenient. 2) C#'s type safety and garbage collection mechanism enhance its advantages. 3) .NET provides a cross-platform running environment and rich APIs, improving development flexibility.

C#.NETisversatileforbothwebanddesktopdevelopment.1)Forweb,useASP.NETfordynamicapplications.2)Fordesktop,employWindowsFormsorWPFforrichinterfaces.3)UseXamarinforcross-platformdevelopment,enablingcodesharingacrossWindows,macOS,Linux,andmobiledevices.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

Dreamweaver Mac version
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

WebStorm Mac version
Useful JavaScript development tools