C#

11. Polymorphism Object-oriented languages use virtual methods to express polymorphism. This means that the derived class can have the same signature method as the parent class, and the parent class can call the method of the derived class) ]. In

20. combination, namespace, and access level In C #, you can organize components (class, structure, Delegate, enumeration, etc.) in your source code into files, namespaces, and combinations. The namespace is just a sweet syntax for long class

5. Processing in custom Mode This is helpful when you consider what will happen if TextReader does not implement the IDisposable interface. This tutorial will show you how to implement Dispose in our own classes. One way is to use the Object Adapter

1. inherit basic knowledge In order to improve the reusability and scalability of software modules, so as to improve the efficiency of software development, we always hope to use the development achievements of our predecessors or ourselves, at the

This article will complete the remaining part of C # network programming (Protocol formation and File Sending) 4. They were originally a complete article, but because the previous article was too long and too many pages were merged, it may be

File Transfer The examples used in the previous two articles are transmission strings. Sometimes we may want to transfer files between the server and the client. . How can we accomplish this? There may be two methods: Similar to the FTP protocol,

I used to use the path planning algorithm implemented by C # When I was idle. I posted it today to see if there is any better implementation solution. For more information about Path Planning (Shortest Path) algorithms, see C ++ algorithm-graph

The code for using the C # link to ACCESS is as follows:Using System. Data;Using System. Data. OleDb; OleDbConnection connection = new OleDbConnection ("Provider = Microsoft. Jet. OLEDB.4.0;" +"Data Source = C: \ DbView \ tysql. mdb ");// Open the

How to use code to set operations in IE and FF to change the Script or JavaScript status in IE, whether it is disabled or enabled. The following articles do not support other browsers.   Currently, two solutions are available (IE is used as an

The first step we need to achieve when writing irrigation robots, capturing resource robots, and Web online game auxiliary tools is user login. So how to use C # to simulate a user's login pull to achieve user login, you must first understand how

Using System;Namespace Param{Class Class1{Static int I = getNum ();Int j = getNum ();Static int num = 1;Static int getNum (){Return num;}[STAThread]Static void Main (string [] args){Console. WriteLine (string. Format ("I = {0}", I ));  Console.

After reading about the book and taking a look at it, I feel that the main function is to implement a transaction function. Others do not see any new things. In addition, this function can also implement the remoting function, which can communicate

Polymorphism means that the same operation acts on instances of different classes and different classes are interpreted to produce different execution results. Polymorphism is implemented by using a derived class to override the virtual function

Jpg images directly generated in the program, with Chinese characters with edges. After some searches, I found the following article on msdn that controls the jpg quality coefficient. I tried it after modification, the effect is indeed much better

This article lists the program source code and notes for connecting C # To Access, SQL Server, Oracle, MySQL, DB2, and SyBase. 1. C # connect to Access Program code: Code highlighting produced by Actipro CodeHighlighter

 Use the CommandText method of the SqlCommand class (to construct a delete statement for it) and ExecuteNonQuery to modify table data. The main program code is as follows. First, instantiate a SqlCommand object (cmd), and then use the SQL parameter (

  The SqlConnection class is used to connect the database (SQL Server). In order to develop good programming habits, the reader should use the three-tier architecture programming idea to complete project development. Place operations related to the

 Use the CommandText method of the SqlCommand class (to construct an insert statement for it) and ExecuteNonQuery to insert data into the table. The main program code is as follows. First, instantiate a SqlCommand object (cmd), and then use the SQL

Recently, I encountered a ref and out parameter problem when writing a program. I looked back at MSDN to consolidate the foundation. I will post my test program to share with you.The ref keyword allows the parameter to be passed by reference. The

I have seen the keyword "yield" N times, and I have not known the power of this keyword until recently. I will show some examples of using "yield" to make your code more readable and better performance.   To give you a quick overview of yield, I