C#

3. Indexer C # by providing an indexer, You can process objects like an array. In particular, attributes. Each element is exposed using a get or set method. Public class Skyscraper { Story [] stories; Public Story this [int index] { Get {

4. Delegate A delegate can be considered a type-safe, Object-Oriented function pointer. It can have multiple methods. The problem of delegate processing can be handled using function pointers in C ++, but can be handled using interfaces in Java. It

9. Consistent types Most languages have basic types (int, long, and so on ). Advanced types are ultimately composed of basic types. It is usually useful to process basic and advanced types in the same way. For example, it is useful if the set can be

10. Operator Overloading Using the operator overload mechanism, programmers can create classes that make people feel like simple types (such as int and long. C # implements a restricted version of the C ++ operator overload, which can make such a

(1) C ++ does not allow calling another constructor (called a Delegate constructor) in a constructor, whereas C # does. For example:C ++:Struct Point {Public:Int X, Y;Point (int x, int y );Point (Point pt): Point (pt. X, pt. Y) {} // error, C ++ not

In C #, I read and write a piece of code from the INI file. In fact, this article only points out a direction and hopes that you can bypass the class. The full text of the Code is as follows: // Write the INI File[DllImport ("kernel32")]Private

This example is used to import the content in ListView to Excel. Unlike the commonly used cell-by-cell writing, this example uses the data Writing Method to range. This method is more efficient.Excel. Application app = new Excel. ApplicationClass ();

In development. for database applications on the. NET platform, DataSet is generally used as ADO. NET core class, which provides us with powerful functions, and looks like a small database in memory, including DataTable, DataView, DataRow,

Using System; Using System. DirectoryServices; Using System. Collections; Using System. Text. RegularExpressions; Using System. Text; /** * @ Author Wu Haiyan * @ Email wuhy80-usual@yahoo.com *-6-25 first version */ Namespace Wuhy. ToolBox { /// /

This article uses the classes provided by C # And. NET to easily create a program that captures the source code of webpage content. HTTP is one of the most basic protocols for WWW Data Access. NET provides two object classes: HTTPWebRequest and

Section 7 overwrite virtual Interfaces Sometimes we need to express an abstract thing. It is a generalization of something, but we cannot really see it as an entity before our eyes, therefore, the object-oriented programming language has the

Like Java, C # provides a rich set of class libraries, methods, and events for developers to use. C # also introduces GDI +, which evolved from GDI, which has more powerful functions than GDI and simplifies programming for programmers. Therefore,

From magician s blogThere will always be a fixed set of buttons and operation conventions in the design of the device Operation Panel, but it is very inefficient to write the same set of code for every project. Most device operation buttons include

The second section of metamorphosis provides extensions for if/else, swith/case, and while. The comments vary and I feel a little far-fetched. One of the examples is a Swith extended application. Today, we suddenly have a new idea and made some

Many extensions have been implemented since the beginning of the series of articles, but too many extensions will cause us a lot of trouble. tips:   In the face of so many "flood" extensions, many people will feel awkward. There is indeed a sense of

I found an interesting progress bar control on the internet two days ago and shared it with you. By the way, I recorded my learning experience. First, take a screenshot to see the effect: As a result of project requirements, it is inevitable that

1. namespace:　　 System. Collections. Generic (Assembly: mscorlib)2. Description:1) ing from a group of keys to a group of values. Each add item is composed of a Value and its associated keys.2) any key must be unique.3) The key cannot be null

1/** // 2 // 1. Clear CircleReference3 // 2.Set Page to Fit Wide4 // 3.Set Column Text fit5 /// 6 /// 7 // 8 private void WorkSheetPageSet (Microsoft. Office. Interop. Excel. Application app, Worksheet ws)9 {10 ClearCircleReference (ws );1112

 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 (

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