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1. The SPFarm object is the highest object within the Windows
SharePoint Services object model
hierarchy. The Servers property gets a collection representing
all the servers in the deployment,
and the Services property gets a collection representing all the
services.
2. Each SPServer object represents a physical server computer.
The ServiceInstances property
provides access to the set of individual service instances that
run on the individual computer.
3. Each SPService object represents a logical service or
application installed in the server farm. A
service object provides access to server farm-wide settings of
the load-balanced service that a
respective service instance implements. Derived types of the
SPService class include, for
example, objects for Windows services, such as the timer
service, search, Microsoft SQL Server,
the database service, etc. and also objects for Web services,
such as Windows SharePoint
Services or services in the Microsoft Office system.
4. An SPWebService object provides access to configuration
settings for a specific logical service
or application. The WebApplications property gets the collection
of Web applications that run
the service.
5. An SPDatabaseServiceInstance object represents a single
instance of a database service
running on the server computer. The SPDatabaseServiceInstance
class derives from the
SPServiceInstance class and thus inherits the Service property,
which provides access to the
service or application that the instance implements. The
Databases property gets the collection
of content databases used in the service.
6. Each SPWebApplication object represents a load-balanced Web
application based in Internet
Information Services (IIS). The SPWebApplication object provides
access to credentials and
other server farm wide application settings. The Sites property
gets the collection of site
collections within the Web application, and theContentDatabases
property collection of content
databases used in the Web application. The SPWebApplication
class replaces the obsolete
SPVirtualServer class; but it can still be helpful to think of a
SPWebApplication object as a
virtual server; that is, a set of one or more physical servers
that appear as a single server to
users.
7. An SPContentDatabase object inherits from the SPDatabase
class and represents a database
that contains user data for a SharePoint Web application.
TheSites property gets the collection
of site collections for which the content database stores data,
and the WebApplication property
gets the parent Web application.
8. An SPSiteCollection object represents the collection of site
collections within the Web
application. The Item property or indexer gets a specified site
collection from the collection, and
the Addmethod creates a site collection within the
collection.
Site Architecture
The following diagram shows the Windows SharePoint Services site
architecture in relation to thecollections and objects of the
Microsoft.SharePoint namespace.
http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spfarm.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spfarm.servers.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spfarm.servers.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spfarm.services.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spfarm.services.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spserver.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spserver.serviceinstances.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spservice.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spwebservice.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spwebservice.webapplications.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spwebservice.webapplications.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spdatabaseserviceinstance.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spdatabaseserviceinstance.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spdatabaseserviceinstance.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spserviceinstance.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spserviceinstance.service.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spdatabaseserviceinstance.databases.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spwebapplication.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spwebapplication.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spwebapplication.sites.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spwebapplication.contentdatabases.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spvirtualserver.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spcontentdatabase.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spcontentdatabase.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spdatabase.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spcontentdatabase.sites.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spcontentdatabase.webapplication.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spsitecollection.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spsitecollection.item.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spsitecollection.add.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spfarm.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spfarm.servers.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spfarm.services.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spserver.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spserver.serviceinstances.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spservice.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spwebservice.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spwebservice.webapplications.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spdatabaseserviceinstance.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spserviceinstance.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spserviceinstance.service.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spdatabaseserviceinstance.databases.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spwebapplication.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spwebapplication.sites.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spwebapplication.contentdatabases.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spvirtualserver.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spcontentdatabase.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spdatabase.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spcontentdatabase.sites.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spcontentdatabase.webapplication.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spsitecollection.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spsitecollection.item.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spsitecollection.add.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.aspx
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1. Each SPSite object, despite its singular name, represents a
set of logically related SPWeb objects
(see below). Such a set is commonly called a "site collection,"
but SPSite is not a standard
Microsoft .NET collection class, in contrast to SPWebCollection.
Rather, it has members that can
be used to manage the site collection. The AllWebs property
provides access to the
SPWebCollection object that represents the collection of all Web
sites within the site collection,
including the top-level site. The
Microsoft.SharePoint.SPSite.OpenWebmethod of the SPSite class
returns a specific Web site.
2.
Each site collection includes any number ofSPWeb objects, and
each object has members that
can be used to manage a site, including its template and theme,
as well as to access files and
folders on the site. The Webs property returns an
SPWebCollection object that represents all
the subsites of a specified site, and the Lists property returns
an SPListCollection object that
represents all the lists in the site.
3. Each SPList object has members that are used to manage the
list or access items in the list. The
GetItems method can be used to perform queries that return
specific items. The Fields property
http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.spweb.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.spwebcollection.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.spsite.allwebs.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.spsite.openweb.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.spweb.lists.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.splistcollection.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.splist.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.splist.getitems.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.splist.fields.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.spweb.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.spwebcollection.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.spsite.allwebs.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.spsite.openweb.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.spweb.lists.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.splistcollection.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.splist.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.splist.getitems.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.splist.fields.aspx
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returns an SPFieldCollection object that represents all the
fields, or columns, in the list, and the
Items property returns an SPListItemCollection object that
represents all the items, or rows, in
the list.
4. Each SPField object has members that contain settings for the
field.
5. Each SPListItem object represents a single row in the
list.
If you install "Infrastructure Update for Windows SharePoint
Services 3.0 (KB951695)," custom solutions
may fail if they call the SharePoint object model while
impersonation is suspended. If you use Windowsauthentication and
your code calls the SharePoint object model from an IIS worker
process, the requestmust impersonate the calling users identity.
Windows SharePoint Services configures ASP.NET toimpersonate the
calling user automatically, but your code may work unexpectedly, or
fail, if you suspendimpersonation--for example, by calling the
RevertToSelffunction of the Windows API, or by calling
theSystem.Security.Principal.WindowsIdentity.Impersonate method and
passing IntPtr.Zero as the
value of the user token parameter. Even if your code does not
explicitly revert to self, it might be calledby ASP.NET after it
reverts to self, such as happens when implementing a virtual path
provider; if yourcode does not impersonate the calling user, it
might not function properly.
http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.spfieldcollection.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.splist.items.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.splistitemcollection.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.spfield.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.splistitem.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.spfieldcollection.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.splist.items.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.splistitemcollection.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.spfield.aspxhttp://msdn.microsoft.com/en-us/library/microsoft.sharepoint.splistitem.aspx
