The note of learning ASP. NET [6] About. Net BCL (base class library, Basic Class Library)

Bcl consists of many classes that provide basic functions for the. NET Framework. Before you create a function, you may need to think about whether someone has completed the work I want to do in the basic class. Then, you can query it in the document, this saves you a lot of time and make your developer life easier.

The namespace (namespace) in some commonly used Bcl is composed of classes with similar or similar functions, which is equivalent to the package in Java .) System contains all the data types required for programming. Other Namespaces and classes in this namespace indicate that they belong to Microsoft.. System. Data provides various types of database programming and can operate ODBC. System. Globalization provides various types of programs that can be internationalized. NET Framework. Many methods use system. Globalization to achieve internationalization. System. Io provides basic support for stream data stream operations, including file, folder, and drive operations. The main function of the stream class is simply to move a file from one location to another. System. text mainly provides operations on text during programming, and provides the stringbuilder class, similar to the stringbuffer in Java, used to combine strings. System. Text. regularexpressions provides the ability to quickly locate and replace specific tags or texts in long texts. It is mainly used for HTML processing, log analysis, and HTTP header analysis. Provide an msdn URL, which details regularexpressions:

Http://msdn.microsoft.com/en-us/library/hs600312 (vs.71). aspx system. Web provides methods for creating web applications. System. Windows. Forms provides various methods for creating Windows applications. System. XML provides various methods to read, modify, and create XML. . NET Framework provides hundreds of namespaces with different functions. The above namespaces are very useful and basic for us to start learning.