Reactive Extensions (Rx) 入门(2) 安装 Reactive Extensio
原文:http://www.atmarkit.co.jp/fdotnet/introrx/introrx_01/introrx_01_02.html 作者:河合 宜文 安装方法 关于 Rx 的安装,可以通过 Reactive Extensions (Rx) 的主页的直接下载安装,当然也可以利用 NuGet 导入 dll (http://nuget.org/packages/Rx-Main
原文:http://www.atmarkit.co.jp/fdotnet/introrx/introrx_01/introrx_01_02.html
作者:河合 宜文
安装方法
关于 Rx 的安装,可以通过 Reactive Extensions (Rx) 的主页 的直接下载安装,当然也可以利用 NuGet 导入 dll (http://nuget.org/packages/Rx-Main) [译注: NuGet 是VS集成的在线 dll部署工具,非常方便]。Rx 不管是 Installer 还是 NuGet 安装的,都有 Stable(稳定版) 和 Experimental(实验版) 两种。
Stable版是API中方法名等不会再变更而Experimental版则是在Stable版中加入了一些实验性的方法等。例如:C# 5.0中新增特性await/async关键字、Expand方法等只在Experimental版中有。只在Experimental版中有的方法会以[ExperimentalAttribute]特性标识,在Visual Studio中通过metadata的表示可以区分出来。因此,在利用Experimental版的时候,这些加上[ExperimentalAttribute]特性标识的方法将来方法名,参数列表还是有可能发生变化的,需要留意。
另外,Experimental版在现在Developer Preview(开发者预览版)中的.NET Framework 4.5和WinRT(Windows 8 运行环境)中已经包含了。C#5.0中特别是针对异步编程比较大的变化策略,已经在反映在Experimental版中。
Assembly分类
Rx的Assembly按照如下功能划分。
程序集名 | NuGet Package名(*1) | 功能 |
System.Reactive | Rx-Main | 基本Core API |
System.Reactive.Windows.Forms | Rx-WinForms | WindowsForm中使用的 ControlScheduler类(*2)和扩展方法 |
System.Reactive.Windows.Threading | Rx-WPF Rx-Silverlight |
WPF/Silverlight中使用的DispatcherScheduler类(*2)和扩展方法 |
System.Reactive.Providers | Rx-Providers | IQbservable接口和其他类库(*3) |
Microsoft.Reactive.Testing | Rx-Testing | UnitTest和Mockup |
Rx的Assembly一览 | ||
Rx的Assembly文件、一般放在「C:\Program Files\Microsoft Reactive Extensions SDK」(32bit版),而64bit版则是放在「C:\Program Files (x86)\Microsoft Reactive Extensions SDK」) | ||
*1 一览中提到的Package是指Stable版,Experimental版的时候则带有「_Experimental」比如:「Rx_Experimental-Main」 | ||
*2 Scheduler 是基于Rx的时间和线程管理的类。ControlScheduler类是对于WinForm及控件进行BeginInvoke调用,DispatcherScheduler类是对Dispatcher进行BeginInvoke。 | ||
*3 「IQbservable」接口名取自「Queryable Observable」。表达式树可以生成一个 Observable 对象。IObservable 接口和 IQbservable 接口的关系就和 IEnumerable 接口和 IQueryable 接口关系相当。 |
Windows Phone 7 SDK 里集成的标准的 Rx 程序集则和上面说的有些不同:
程序集名 | 功能 |
System.Observable | IObservable |
Microsoft.Phone.Reactive | Core API和DispatcherScheduler类 |
![]() | |
Windows Phone 7 SDK的程序集一览 |
如果更加重视是否是使用标准程序集且不需要额外引用程序集,那么直接使用 Microsoft.Phone.Reactive;如果希望能在 WPF,Sliverlight 中移植,那么就选择 Data Developer Center 版本好了。
相关的库
Javascript 版本并不包含在Install 中,但可以从 Rx 主页最下方下载 ZIP 得到。库的主体是 Rx.js ,除此之外还有 jQuery 和 prototype.js。
命名空间分类
Rx 主要是以扩展方法为中心的,如果没有正确的使用 using/Import 导入命名空间则无法使用。下面例举主要的命名空间以及代表的功能和类。
名前空間 | 功能点 |
System | Subscribe订阅 IObservable 接口使用的Lambda表达式的扩展方法 |
System.Reactive | 主要接口和一些基本类 |
System.Reactive.Concurrency | 实现 IScheduler 接口的一些类 |
System.Reactive.Disposables | 实现 IDisposable 接口的一些类 |
System.Reactive.Joins | 利用 Observable.And/Observable.Then 方法进行Join操作的类 |
System.Reactive.Linq | Rx 主要的命名空间,Observable 类和IObservable接口的一些扩展方法 |
System.Reactive.Subjects | 实现 ISubject 接口(实现 Rx 语义的事件)的一些类 |
System.Reactive.Threading.Tasks | Task 相互转换的扩展方法 |
![]() | |
Rx 的命名空间和代表性的功能以及类 |
另外,Windows Phone 中,Microsoft.Phone.Reactive 程序集里的 Rx 全部在 Microsoft.Phone.Reactive 命名空间下。
Reactive Extensions (Rx) 入门(1) —— Reactive Extensions 概要
Reactive Extensions (Rx) 入门(2) —— 安装 Reactive Extensions
Reactive Extensions (Rx) 入门(3) —— Rx的事件编程①

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