C#

C # basic syntax Learning (6 ), Abstract class and seal class 　　When defining a class, you can use the abstract keyword to declare that this class is abstract. The abstract class cannot be instantiated, that is, the instance of the abstract class

Entity Framework Code First migration fundamentals, entityframework   EF Code First and migration are used in the project, but some aspects seem to be understandable. For example, how to control the migration process in the migration file? If the

C # Data Center reconstruction-difficult to start with everything (2)Preface The reason why I still use this question is that I want to tell myself that no matter how unknown things are, don't be afraid. Just do it. During so many days of Data

Class serialization and java class serialization Class Program {static void Main (string [] args) {A = new a () {AppId = "4", haor = "Haoran"}; var bytes =. objectToBytes (a); var classA =. bytesToObject (bytes); Console. readKey ();} [Serializable (

Quartz. Net Study Notes (1)-complete example, quartz.net Study NotesI. Development Environment System: Win10 Compiler: VS2013 . Net: 4.5 Quartz version: 2.3.3Ii. Assembly Common. Logging. Core. dll Common. Logging. dll Quartz. dllIii. Project

[C # advanced series] 09 attributes, Attributes can be divided into non-parameter attributes and parameter attributes (I .e., indexer ). The advantages of attributes over fields are not only encapsulation, but also some additional operations during

Hexadecimal conversion, hexadecimal to hexadecimal Today, I learned how to convert the hexadecimal format. The materials are as follows: Decimal: 10 Base: 0 ~ 9 Binary: 2 base: 0, 1 Octal: 10 Base: 0 ~ 7 Hexadecimal: 16 base: 0 ~ 9, A (10), B (11),

How to Use Lambda Expressions to write left-link queries In C #, if you want to query the left link of two lists, the general usage is to use the linq expression List pets = new List {new Pet {Name = "Barley", Age = 8}, new Pet {Name = "Boots",

Design Model --- simple factory and Singleton, design model --- Factory 1. Concept of design pattern: Design pattern: Design pattern is a set of summary of code Design experiences that are repeatedly used, known to most people, classified and

[C # advanced series] 04 type basics, About System. Object All types are derived from System. Object. In the public methods of System. Object, ToString () is generally the full name of the returned Object type. Only after Int32 is overwritten, the

A simple and practical. Net extension written for Disruptor, disruptor.net   The disruptor user encapsulates its own consumers and injects the consumers into the consumer container. The consumer container automatically creates cache queues and

Talking about C # multi-state mana, Preface: We all know three characteristics of object-oriented: encapsulation, inheritance, and polymorphism. Encapsulation and inheritance are good for beginners. But to understand polymorphism, especially deep

Seven object-oriented design principles and seven design principles I. Single Responsibility Principle One class is better to do only one thing, and only one is causing its changes. The single responsibility principle can be seen as the extension of

C # Call SendMessage usage, Function: This function sends a specified message to one or more windows. This function calls the window program for the specified window until the window program finishes processing the message and returns it. This

Image loading and releasing If the image is loaded again, an error is reported. This method can avoid this problem. Method 1: 1. Use bitmapPIC to obtain the bitmap object of the image from the file.2. Then Clone a bitmap object Bitmap bmpCrop =

C # several methods to bind DropDownList to add new data, First: manually bind data to the foreground (applicable to fixed data items) Nanjing Yangzhou Xuzhou Suzhou Type 2: dynamic binding in the background DataTable dt = new DataTable ();

C # Use of the keyword extern, Modifier is used to declare methods for external implementation. The common usage of the extern modifier is to call a non-It is used together with the DllImport attribute for code hosting. In this case, the method must

C # Call the gold data API, First of all, spit out the gold data API documentation http://help.jinshuju.net/articles/api-intro.html written very rough ah... anyway, I am not too clear The form api is used as an example to show you only an

Java environment variables are automatically configured. Well, C # is used to configure JDK, When chatting with students, I found that some people were unfamiliar with environment variable configuration when they first came into contact with Java.

Staff attendance information management Applet and attendance information management Applet Although this is a small program, it still uses a lot of knowledge points, mainly "" using collections to organize related data. "", this knowledge point is