Client Object Model - SharePoint Extreme 2012

Using Client
Object
Model

Daniel Plocker
CTO, Advantech

Agenda

• Client Object Model
overview
• ECMA Script Client OM
• Extending SP with
HTML 5
• Going Mobile
• .Net Managed Client

Why
Client
OM?

Client side integration between
SharePoint and existing Office or LOB
apps simplifies day-to-day activities.
Richer, smoother and more intuitive
user experience.
Better multi-platform support.

The
Basics

 Client-side library for remotely calling
SharePoint
 Mirrors (a subset) of objects on the server
 Usable in JavaScript, .net CLR, Silverlight CLR
 Requests are batched for over- the-wire
performance
 Used by SharePoint UI for operations like
batch deletion

3 things
to know

1. ClientContext is the central object
clientContext = new
ClientContext(“http://mysite”);
2. Before you read a property, you have to ask for it
clientContext.Load(list);
3. All requests must be committed in a batch
clientContext.ExecuteQuery();

Accessing
Data with
Client OM

client
server

Client Object
Model
Limitations

 Client object model cannot be used on server
to talk to same-server
 You still need to handle synch/update
semantics (change log could help)
 No elevation of privilege capabilities
 Requests are throttled
 .net CLR has sync method;
Silverlight CLR and Jscript are async

JavaScript
Client
object
model

JavaScript
Client
OM

 JavaScript Client OM is easily added to a
SharePoint ASPX page - reference:
 _layouts/sp.js
 Add this using <SharePoint:ScriptLink>
 All libraries crunched for performance
 Use un-crunched *.debug.js files with debug
mode
 Method signatures can be different
compared to .NET and Silverlight
 Different data value types

JavaScript
Client
OM

 C:Program FilesCommon FilesMicrosoft
SharedWeb Server
Extensions14TEMPLATELAYOUTS
 SP.js (SP.debug.js)
 380KB (559KB)
 SP.Core.js (SP.Core.debug.js)
 13KB (20KB)
 SP.Runtime.js (SP.Runtime.debug.js)
 68KB (108KB)

Fluent UI
Status Bar
and
Notification
Area

Items not
covered by
CSOM

 User Profiles
 People
 Search
 Enterprise Metadata
 Excel REST web services
 Publishing
 Administration

HTML 5

 <HTML>
 <CANVAS>
 <VIDEO>
 <INPUT>
 <AUDIO>
 <COMMAND>
 <DATALIST>
 <TIME>

HTML 5 –
Getting it
Working

 <HTML> tag
 Internet Explorer 9 compatibility
 <meta http-equiv="X-UA-Compatible"
content="IE=9"/>
 Potential issues and workarounds

Going
Mobile
with
JQuery
 jQuery is a cross-browser JavaScript
library designed to simplify the client-
side scripting of HTML
 $("div.test").add("p.quote").addClass("bl
ue").slideDown("slow");
 $.each([1,2,3], function(){ … }
 jQuery Mobile is a touch-optimized
web framework

Going
Mobile
with
SharePoint
 Built-in mobile view with &mobile=1
 You can customize the mobile view and
master page.
 To take advantage of JQuery Mobile:
 Create a simple master page, HTML5
valid
 Add script links
 To use with client OM, don’t forget
ExecuteOrDelayUntilScriptLoaded

.Net CLR
Client
OM

 Provides easy access from remote
.NET clients to manipulate
SharePoint data
 Can be utilized from managed code
- also from office clients etc.
 Assemblies
 Microsoft.SharePoint.Client.dll (281kb)
 Microsoft.SharePoint.Client.Runtime.dll
(145kb)

Summery

 Client OM
 3 Flavors
 Batch processing
 .Net Managed Client
 Integration with LoB
 ECMAScript Client OM
 Simplify UI
 Basis for client-side programming
 HTML5 and Mobile
 Enable HTML5
 Use JQuery

Client Object Model - SharePoint Extreme 2012

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