1. Hands on LINQ to SharePoint
Welcome
Hands on LINQ to SharePoint
Blog:
Twitter: @PaulBeck1
Saturday, May 14, 2011 from 08:45 PM - 13:00 PM – Cobham South West London

2. Final Product Download the code What we are building
west-london.html
What we are building

3. Final Product
2 related lists Orders and Customers

4. 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
History of LINQ
language-integrated query - extends C# and with native language syntax for queries and provides class libraries.
LINQ syntax, lambda & strongly-typed

5. 16/06/2018
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> /parameters:<file>
Use parameters file, otherwise a class will be generated for each visible list, only show id and version from the hidden fields
More flexible
CKSDev for generating the LINQ to SharePoint proxy
C# or VB.NET

6. 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

7. 16/06/2018
Selecting & Update
Similar to T-SQL
Lamda expressions

8. Insert

9. Delete

10. Display CAML Generated Code

11. Custom Site Columns
The business entity class has to implement the ICustomMapping interface

12. Thank-you Blog: http://blog.sharepointsite.co.uk Twitter: @PaulBeck1
Reference & Thanks:
Paul Schaeflein
Todd C. Bleeker
Serge Luca
Mostafa Elzoghbi
Ted Pattison