16. What is SharePoint 2013 site
definition?.
Site Definitions : As the name implies, A Site definition is
"core definition of a site”.
• combination of files that are placed in the 12
hive of WFE
during installation of SharePoint.
• Site definition files include .xml, .aspx, .ascx,
and .master
page files, as well as document template files
(.dot, .htm,
and so on), and content files (.gif, .doc, and so
on).
17. Differences between site definition
and site templates .
1. To create or use a site definition you need
server admin access, but site template can install from web UI by site owners.
2. Site definition supports feature stapling, but
for site template additional features must be activated in gallery.
3. Site definitions are stored on hard disk, but
site templates are stored in content DB.
4. Site definition can provision multiple webs, but
site templates are for single web only.
5. Creating site definition is relatively more
complex than site template creation.
18 .Allow unsafe update VS run with elevated privileges
If
code modifies Windows SharePoint Services data in some way, you may need to
allow unsafe updates on the Web site, without requiring a security validation.
You can do by setting the AllowUnsafeUpdates property.
There
are certain object model calls model that require site-administration
privileges. To bypass access-denied error, we use RunWithElevatedPrivileges
property when request is initiated by a nonprivileged user. We can successfully
make calls into the object model by calling the RunWithElevatedPrivileges
method provided by the SPSecurity class.
Allow
unsafe update is set to true when we are updating the content database to avoid
external injections.
RWEP
- It executes method with full rights even if the user does not otherwise have
full control.
SPSecurity.RunWithElevatedPrivileges(delegate()
{ using (SPSite site = new
SPSite(web.Site.ID))
{ // implementation details omitted
} });
19 .What is LINQ Primer and how
to use in SharePoint ?
LINQ
or Language Integrated
Query is a very useful language which reduces the complexity of
accessing and integrating information that is not natively defined using OO
technologies
Use of LINQ
Step
1: Add Microsoft.SharePoint.LINQ Reference
Step
2: Use the SPMETAL to generate the LINQ-to-SharePoint Data Context Class
C:\Program
Files\Common Files\Microsoft Shared\Web Server Extensions\14\BIN>spmetal.exe
/web:http://sp2010vm/namespace:SandboxedSolution.ProjectDashboardSummary
/code:SPProjectInitiation.cs
This
will create the SPProjectInitiation.cs in the C:\Program Files\Common
Files\Microsoft Shared\Web Server Extensions\14\BIN and
SPProjectInitiationDataContext as a Data Context. Please remember you have to
regenerate this class every time you change the schema in the SharePoint
Lists.
Step
3: Add the LINQ-to-SharePoint Data Context Class (e.g.
SPProjectInitiation.cs) in your Visual Studio Project
Step
4: Write the Queries against the SharePoint List
SPProjectInitiationDataContext dc
= new SPProjectInitiationDataContext(SPContext.Current.Site.Url);
var query = from c in
dc.BusITCapitalBudget
where
c.Year.Equals(strYear)
select c;
string strTargetCapitalBudget =
"0";
foreach (var c in query)
{
strTargetCapitalBudget =
c.TargetCapitalBudget == null ? "0" :
c.TargetCapitalBudget.ToString();
}
20 .What is SPMetal ?
SPMetal
is a command-line tool that generates entity classes and this classes are used
in LINQ to SharePoint queries and also used to add, delete, and change list
items with concurrency conflict resolution.
SPMetal.exe
is presented in the below location:
C:\Program
Files\Common Files\microsoft shared\Web Server Extensions\15\BIN
Thank you very much
Fahadullah Karimi
SharePoint Specialist
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