viusal basic程序员的.net泛型编程（.net generic programming for Viusal basic programmers）.doc

viusal basic程序员的.net泛型编程（.net generic programming for Viusal basic programmers） .NET generic programming for Viusal Basic programmers .NET 2 supports templates called generics. The basic concept is the same: define a method or class with one or more methods, and specify the data type as an alternative element. In practice, use uppercase characters T. Finally, when you use the method or class, specify a type for the generic T, and then the compiler will generate a new and unique method or class based on that type using the new information. This new element turns into a complete, unique block of code, fully benefiting from the compilers processing power. This article will analyze the generic methods and class definitions that are published along with.NET 2, and the use of generic classes. Two, define generic methods The generic capabilities of.NET 2 can define such granularity as a single method. The solution is to separate the data type from the algorithm and parameterize the data type. Each reference reference to the method with different data types yields a different approach. Generic methods also support constraints and overloads. A generic method constraint is a new language feature that adds a type constraint to a generic type, thus limiting the data type of generic parameters. As a result, methods can be overloaded according to the presence of generic parameters. The next few examples will analyze overloaded generic and non generic methods. ) The typical use of generics is to separate data types from general algorithms. A formal example is the transformation of sorting algorithms into generic sorting algorithms. A very straightforward example is parameterization of an Swap method. Listing 1 shows you how to define a generic Swap method that switches two arguments of any type. It contains a console application that shows how to call generic methods: Listing 1: how to call generic methods Module Module1 Sub, Main () Dim, I, As, Integer = 5 Dim, J, As, Integer = 7