C# 泛型类的扩展方法
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Extension Method for Generic Class
提问by Will
Possible Duplicates:
C# -Generic Extension Method
How do you write a C# Extension Method for a Generically Typed Class
Is it possible to declare extension methods for generic classes?
是否可以为泛型类声明扩展方法？
public class NeedsExtension<T>
{
public NeedsExtension<T> DoSomething(T obj)
{
// ....
}
}
回答by Asad
How do you write a C# Extension Method for a Generically Typed Class
public static class NeedsExtension<T>
{
public static string DoSomething <T>(this MyType<T> v)
{ return ""; }
// OR
public static void DoSomething <T>(this MyType<T> v)
{
//...
}
}
回答by Johannes Rudolph
Yes, but you forgot the thiskeyword. Look at Queryable that provides all the LINQ operators on collections.
是的，但您忘记了this关键字。查看提供集合上所有 LINQ 运算符的 Queryable。
回答by JaredPar
Sure
当然
public static void SomeMethod<T>(this NeedsExtension<T> value) {
...
}
回答by Stan R.
To extend any class
扩展任何类
public static class Extensions
{
public static T DoSomething<T>(this T obj)
{
//...
}
}
To extend a specific generic class
扩展特定的泛型类
public static NeedExtension<T> DoSomething<T>(this NeedExtension<T> obj)
{
//...
}
