C＃的'动态'在F＃ [英] C#'s 'dynamic' in F#

问题描述

在C＃中使用DLR的一个例子如下：

One example of using the DLR in C# is as follows:

dynamic dyn = new MyObject();
dyn.MyMethod(); //resolved at runtime

F＃中的等价物是什么？

what would be the equivalent in F#?

谢谢。

推荐答案

？对C＃中的动态关键字具有类似的表达力（但它只能用于读取属性，方法调用和属性设置）。

The ? operator has similar expressive power to the dynamic keyword in C# (but it can be only used for reading of properties, method invocation and setting of properties).

没有内置的实现，允许您动态地使用.NET类的属性或方法（通过Reflection或DLR），但是社区中有一些相当可靠的实现。这已在之前的另一个SO问题中进行了讨论。

There is no built-in implementation that would allow you to dynamically use properties or methods of a .NET class (via Reflection or DLR), but there are some fairly solid implementations from the community. This has been discussed in another SO question before.

还有一些？的实现，可以访问一些常见的数据源，如SQL数据库。例如，此MSDN文章包含一个允许您写入的定义 db？Query？Foo（1）调用名为 Foo 的存储过程

There are also implementations of ? that allow you access some common data sources such as SQL databases. For example, this MSDN article includes a definition that allows you to write db?Query?Foo(1) to call a stored procedure named Foo.

对于各种其他类型（例如在XAML中查找元素或访问XML文档中的元素或属性），？的定义非常容易写。

For various other types (such as finding an element in XAML or accessing elements or attributes in XML document), the definition of ? is quite easy to write.

这篇关于C＃的'动态'在F＃的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！