CSharp make plugin(Addin) program C# 編寫基於外掛程式的程式

   為了使軟體具有更好的可重用性和可擴充性,提出了外掛程式(Plug-in)的思想並,國外一些優秀的都是基於此寫的.ie，firefox,eclipse等等...具體理論知識我也不多說了,從網上摘了兩段.....

 

In computing, a plug-in
(also: plugin
, addin
, add-in
, addon
, add-on
, snap-in
or snapin
; but see also extension
) consists of a computer program that interacts with a host application (a web browser or an email client
, for example) to provide a certain, usually very specific, function "on demand". Often, add-on
is considered the general term comprising plugins, extensions, and themes as subcategories^{[citation needed
]
.}

Applications support plugins for many reasons. Some of the main reasons include:

• to enable third-party developers
  to create capabilities to extend an application
• to support features yet unforeseen
• to reduce the size of an application
• to separate source code from an application because of incompatible software licenses.

Examples of applications and their plug-ins include:

• Microsoft Office uses plug-ins (better known as add-ins) to extend the capabilities of its application by adding custom commands and specialized features
• Rockbox, a firmware for digital audio players, can use plug-ins, for example: play games, use the text editor
• Email clients
  use plug-ins to decrypt and encrypt email (Pretty Good Privacy) or to send oversized email attachments (Globalscape Mail Express
  )
• Graphics software use plug-ins to support file formats and process images (Adobe Photoshop)
• Media players
  use plug-ins to support file formats and apply filters (foobar2000, GStreamer, Quintessential
  , VST, Winamp, XMMS)
• Packet sniffers
  use plug-ins to decode packet formats (OmniPeek)
• Remote sensing applications use plug-ins to process data from different sensor types (Opticks
  )
• Software development environments use plug-ins to support programming languages
  (Eclipse
  , jEdit, MonoDevelop)
• Web browsers use plug-ins to play video and presentation formats (Flash, QuickTime, Microsoft Silverlight, 3DMLW)
• Some digital mixing consoles allow plug-ins to extend features such as reverberation effects, equalization and compression.
• Some Web content management systems use plug-ins to increase functionality.

基本原理：

The host application provides services which the plug-in can use,
including a way for plug-ins to register themselves with the host
application and a protocol
for the exchange of data with plug-ins. Plug-ins depend on the services
provided by the host application and do not usually work by themselves.
Conversely, the host application operates independently of the
plug-ins, making it possible for end-users to add and update plug-ins
dynamically without needing to make changes to the host application.

Open application programming interfaces
(APIs) provide a standard interface, allowing third parties to create
plug-ins that interact with the host application. A stable API allows
third-party plug-ins to continue to function as the original version
changes and to extend the life-cycle of obsolete applications. The Adobe Photoshop and After Effects plug-in APIs have become a standard^{[citation needed
]
and competing applications such as Corel Paint Shop Pro have adopted them to some extent. Other examples of such APIs include Audio Units and VST.}

Games and productivity applications often use plug-in architectures
which allow original and third-party publishers to add functionality.

The Microsoft Flight Simulator series has become well-known for its aircraft add-ons.

Outside software, a network switch may ship with an unoccupied but non-standard port to accommodate various optional physical-layer connectors.

Outside software again, manufacturers can use plug-ins to create vendor lock-in by limiting upgrade options solely to those available from or endorsed by the original manufacturer. IBM's Micro Channel Architecture
, technically superior to Industry Standard Architecture
as a way to add components to IBM PCs, largely failed to gain wide
support due to the difficulty in getting certification for third-party
devices.

 

上面這邊原文的串連地址為：http://en.wikipedia.org/wiki/Plug-in_%28computing%29#Plug-ins_and_extensions

csdn裡有有一篇介紹外掛程式實現的bolog：http://blog.csdn.net/stella_tangxing/archive/2005/04/28/366850.aspx

 

在我的資源裡有一個我用CSharp寫的一個簡單的程式,闡述了外掛程式的具體實現.....或者郵件告我我發給你們...請您多多指教.....