像这样根结点是Addin的一个XML文件就是Addin
<
AddIn
name
= "Typed Collection Wizard"
author
= "Mike Krueger"
copyright
= "GPL"
url
= "unknown"
description
= "Creates a typed collection"
version
= "1.0.0"
>
<
Runtime
>
<
Import
assembly
="TypedCollectionWizard.dll"
/>
</
Runtime
>
<
Extension
path
= "/SharpDevelop/Templates/File/TypedCollection"
>
<
DialogPanel
id
= "CollectionGenerator"
label
= "Typed Collection"
class
= "TypedCollectionGenerator.TypedCollectionWizardPanel"
/>
</
Extension
>
</
AddIn
>
<Runtime>中包含的是这个addin正常工作所需的程序集列表,
<Extension>中包含的子结点,叫做一个codon
Addin类中分析addin文件的部分
public
class
AddIn
...
{
string name = null; string author = null; string copyright = null; string url = null; string description = null; string version = null; string fileName = null; Hashtable runtimeLibraries = new Hashtable(); ArrayList extensions = new ArrayList(); 
/**//// <summary> /// returns a hashtable with the runtime libraries /// where the key is the assembly name and the value /// is the assembly object.
/// </summary> public Hashtable RuntimeLibraries ...{ get ...{ return runtimeLibraries; } } /**//// <summary> /// returns a arraylist with all extensions defined by /// this addin. /// </summary> public ArrayList Extensions ...{ get ...{ return extensions; } } /**//// <summary> /// Initializes this addIn. It loads the xml definition in file /// fileName. /// </summary> public void Initialize(string fileName) ...{ this.fileName = fileName; XmlDocument doc = new XmlDocument(); doc.Load(fileName); try ...{ name = doc.SelectSingleNode("AddIn/@name").Value; author = doc.SelectSingleNode("AddIn/@author").Value; copyright = doc.SelectSingleNode("AddIn/@copyright").Value; url = doc.SelectSingleNode("AddIn/@url").Value; description = doc.SelectSingleNode("AddIn/@description").Value; version = doc.SelectSingleNode("AddIn/@version").Value; } catch (Exception) ...{ throw new AddInLoadException("这不是一个标准的addin文件,不包含,作者,版权,地址等信息"); } foreach (object o in doc.DocumentElement.ChildNodes) ...{ if (!(o is XmlElement)) ...{ continue; } XmlElement curEl = (XmlElement)o; switch (curEl.Name) ...{ case "Runtime"://动态地加入运行时支持库 AddRuntimeLibraries(Path.GetDirectoryName(fileName), curEl); break; case "Extension"://加入Extension AddExtensions(curEl); break; } } }
}
