Venkat Babu

Client Side APIs refer to the Client Object Model that was introduced in SharePoint 2010. There are basically 3 "flavors" of the Client Object Model: .NET, Silverlight and JavaScript (ECMAScript) The Main advantage of the CSOM is that you do not need to be on the Server to use them in your program. The .NET client object model can be used in any Desktop or Web Client. The Silverlight CSOM can be used in silverlight applications (doh!) and you can call the JS Client Object Model directly from your web pages. 45 down vote 2013 Model Types: CSOM: Client-side object model. C# (or Visual Basic) only, use NuGet, at the moment same package for both 2010 and 2013. JSOM: JavaScript object model. JavaScript only. SP.ClientContext.get_current() for normal use. new SP.ClientContext('url...') for specific SPSite. Note this works cross-SPSite in 2013. SSOM: Server-side object model. C# (or Visual Basic) only, use Microsoft.SharePoint (15) DLL. Must be deployed on same farm. REST: REST web technologies and standard Open Data Protocol (OData) syntax. Either JS (JavaScript) or C# (or Visual Basic) helper package in NuGet. Hosting: SharePoint hosted: JavaScript and templates only. By templates I mean list templates, content types, etc. Anything that can be uploaded to the SharePoint virtual file system can also be added, such as .aspx-pages. Autohosted: C# (or Visual Basic) only. Currently only supported on Office 365. On app purchase an Azure instance will be automatically provisioned. Uses OAuth to comunicate to SharePoint site. Provider hosted: C# (or Visual Basic). Similar to Autohosted, but is meant to be hosted more manually (i.e. On Azure). So you fire up a web application, on any server, and then use S2S to connect to SharePoint. Sandboxed: Remnant from 2010, can be uploaded to Solution gallery. Support for limited subset of the SSOM. No file access, so can not deploy anything to _layouts folder. If you use the limited SSOM-part (C#) your solution will be considered deprecated. Support for templates such as list templates and content types, deployed directly to host web. Farm solution: Full access, deploy through PowerShell. Technologies table: +--------------------------------------------------------+ ¦ ¦ CSOM ¦ JSOM ¦ SSOM ¦ REST JS ¦ REST C# ¦ ¦---------------+------+------+------+---------+---------¦ ¦ JavaScript ¦ ¦ x ¦ ¦ x ¦ ¦ ¦ C# ¦ ¦ ¦ x ¦ ¦ x ¦ ¦ From browser ¦ ¦ x ¦ ¦ x ¦ ¦ ¦ From server ¦ x ¦ ¦ x ¦ ¦ x ¦ ¦ OAuth2 ¦ x ¦ x ¦ x ¦ x ¦ x ¦ ¦ S2S ¦ x ¦ ¦ x ¦ ¦ ¦ +--------------------------------------------------------+ Hosting table: +---------------------------------------------------------------------+ ¦ ¦ CSOM ¦ JSOM ¦ SSOM ¦ REST JS ¦ REST C# ¦ ¦---------------------+------+------+-------------+---------+---------¦ ¦ SharePoint hosted ¦ ¦ x ¦ ¦ ¦ ¦ ¦ Autohosted ¦ x ¦ ¦ ¦ ¦ x ¦ ¦ Provider hosted ¦ x ¦ ¦ ¦ ¦ ¦ ¦ Sandboxed solution ¦ x ¦ x ¦ x(limited) ¦ x ¦ x ¦ ¦ Farm solution ¦ x ¦ x ¦ x ¦ x ¦ x ¦ +---------------------------------------------------------------------+ 2010 Model Types: CSOM: Client-side object model. C# (or Visual Basic) NuGet and JavaScript. SP.ClientContext.get_current() for normal use. new SP.ClientContext('url...') for specific SPWeb. SSOM: Server-side object model. C# (or Visual Basic) only, use Microsoft.SharePoint (14) DLL. Must be deployed on same farm. REST: REST in 2010 is only for ListData.svc. Note that SPServices (jQuery plugin) utilizes the .asmx services in _/vti/bin , such as /_vti_bin/Webs.asmx Technologies table: +-------------------------------------+ ¦ ¦ CSOM ¦ SSOM ¦ REST ¦ ¦---------------+------+------+-------¦ ¦ JavaScript ¦ x ¦ ¦ x ¦ ¦ C# ¦ x ¦ x ¦ x ¦ ¦ From browser ¦ ¦ x ¦ x ¦ ¦ From server ¦ x ¦ x ¦ ¦ +-------------------------------------+ Hosting table: +---------------------------------------------------------------------+ ¦ ¦ CSOM ¦ JSOM ¦ SSOM ¦ REST JS ¦ REST C# ¦ ¦---------------------+------+------+-------------+---------+---------¦ ¦ Sandboxed solution ¦ x ¦ x ¦ x(limited) ¦ x ¦ x ¦ ¦ Farm solution ¦ x ¦ x ¦ x ¦ x ¦ x ¦ +---------------------------------------------------------------------+