1. SharePoint data access and LINQ to SharePoint
Welcome
SharePoint data access and LINQ to SharePoint
Blog:
Twitter: @PaulBeck1
Monday, April 04, 2011 from 6:00 PM - 8:00 PM – Johannesburg South Africa

2. Overview of the Evening
29/11/2018
Overview of the Evening
11/29/2018
SharePoint Lists
Overview of SharePoint Data Access
LINQ to SharePoint
How to use LINQ to SharePoint (CRUD)
Demonstration

3. SharePoint Lists Comparison of SP2010 lists vs. DB tables
Database Tables
SP security and permissions
Transactional
Workflow
Performance (trans volumes)
Versioning
Distinct queries and aggregations
Office integration
Greater flexibility
Native / Easy setup
Easy for .NET developers
SP generates UI
List is similar to table; Referential integrity; Performance;

4. Overview of SP2010 Data Access
11/29/2018 2:55 AM
Overview of SP2010 Data Access
Web Services
Client-side
REST APIs
Strongly-typed
Silverlight
.NET
ECMAScript
Client OM
Weakly-typed
Data Platform
Farm
Site
List Data
External Lists
Server-side
Server OM
Weakly-typed
CAML
LINQ to SharePoint
Strongly-typed
New in SP2010
Adapted from Todd Bleeker
© 2007 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

5. context.ExecuteQuery();
29/11/2018
SP2010 Data Access
Client Object Model
3 options
Silverlight CLR
.NET CLR
JavaScript
Client Application
Using Client OM
SharePoint 2010
XML
context.ExecuteQuery();
ListData.svc (WCF)
Client OM subdivision of Server OM
Request to Client.svc is httpWebRequest or XmlWebRequest depending on client OM used.
JSON
Server OM

6. SP2010 Data Access REST API Web Service Syntax:
29/11/2018
SP2010 Data Access
REST API
Syntax:
/_vti_bin/ListData.svc/{Entity}[({identifier})]/[{Property}]
Example to get the tax spent for the 4th Order:
/_vti_bin/ListData.svc/Orders(4)/TaxSpent
Web Service
*.asmx
Representational State Transfer (REST) Simple and integrated developer experience for list based Data Applications
Server OM – API inefficient, patterns to displose objects, not strongly tped

7. SP2010 Data Access Server Object Model Managed code for COM
Flexible scope
List performance (CAML)
CAML to manipulate SP2010 list data
SPQuery (query within the site)
SPSiteDataQuery (cross site collection query)
U2U tool

8. LINQ to SharePoint LINQ to SharePoint/SPMetal CAML
LINQ to SharePoint = SPLINQ = SPMetal
Proxy
LINQ to SharePoint/SPMetal
Server OM
CAML
List
SharePoint List data
language-integrated query - extends C# and with native language syntax for queries and provides class libraries.
LINQ syntax, lambda & strongly-typed

9. Decision Matrix for SP2010 Data Access
Source: Todd Bleeker & Paul Schaeflein –SP data access decision matrix

10. Overview of SP2010 Data Access
Other Options
LINQ to SQL
Entity framework
BCS
WCF/Web Services
BLOB Storage
AZURE/the cloud
File systems
XML

11. 29/11/2018
SPMetal.exe
SPMetal.exe is the tooling to generate the LINQ to SharePoint proxy code
Generates strongly typed classes
SPMetal.exe in 14\bin
Syntax:
spmetal /web:<url> /code:<file>
spmetal /web:<url> /code:<file> /parameters:<file>
spmetal /web: /code:c:\ListData.cs /namespace:PaulBeck.SP2010.BOL
Use parameters file, otherwise a class will be generated for each visible list, only show id and version from the hidden fields
More flexible
C# or VB.NET

12. Issues with LINQ to SharePoint
“Inefficient” queries – Querying data, Joins
.ToList() - Non CAML compliant queries need to work around using LINQ to Objects.
Add hidden fields, hide lists (parameters file)
Only supports SP2010 foundation fields
Attachments, managed metadata, custom site columns requires ICustomMapping.
SPMetal cannot query cross site collections
External Content Types are not supported

13. Query across site collections
How many site collections?
Microsoft supports up to 200 GB content databases: performance decreases & disaster recovery becomes complex
Create several site collections (be prepared as LINQ to SharePoint doesn’t cross Site collections unless you use REST with LINQ to SharePoint)

14. LINQ to SharePoint Best Practices
ObjectTrackingEnabled=false;
Use parameters to include hidden fields
Use projected fields, lookups are expensive
Implement ICustomMapping.Resolve(..)
Use the developer dashboard

15. Demonstration
SPMetal.exe with parameters
Generated code
Demo1.1
To di

16. Thank-you Blog: http://blog.sharepointsite.co.uk Twitter: @PaulBeck1

17. References & Thanks Paul Schaeflein Todd C. Bleeker Serge Luca
Mostafa Elzoghbi