Remote event receivers in SharePoint 2013

The remote events supports

Site - Create, Move, Delete
List - Create, Delete
List schema - Create, Update, Delete
List Item - Create, Update, Delete, Move, CheckIn, UnCheckIn, CheckOut, AttachmentsAdded, AttachemntsRemoved, FileMoved, FileConverted
App - Install, Update, Uninstall

Some Impotent Points to be noted:

• Remote event receivers call across the networks
• After events use WCF(Windows communication foundation) call on remote web so that they do not block the sharepoint host nor delay the response back to the user
• Remote event recievers will only workf if the concern list is present in App Web
• SharePoint hosted apps doesnt support remote event receievers, its only provider hosted apps
• IRemoteEventService an interface thats get inherited in remote event recievers
• We have only two events called "ProcessEvent" which is a two way event and "ProcessOneWayEvent" for one way
• Properties argument defines the event that has fired on a list item
• We will be having only single entry point for all the events
• Properties.ItemEventProperties is for an item events and Properties.ListEventProperties for list events
• SPRemoteEventResult which is used to sent status back to SharePoint(used for sending information and also for canceling the events)

Before events example

After events example

• App Life Cycle events are two way events
• "ProcessOneWayEvent" never file in App related events

This are just brief points about remote event recievers.

points to be noted on Event receivers in SharePoint 2013

properties.ErrorMessage is used for showing error in event handlers

properties.ListItem.Updateoverwriteversion() is used to overwrite version in list item, rather than adding a new version to the item it overwrites the existing one.

this.EventFiringEnable = false or True to stop or start the events on a list item, when ever you use "Updateoverwriteversion()" method inside a event we should set "this.EventFiringEnable= True" to stop the recursion 

SharePoint 2013 People Picker error: “Sorry, we’re having trouble reaching the server.”

If you see the above error while adding users to a group or to a site there are many resolutions which are out there in internet.

but for me i have tried everything which i seen based on the above error but nothing worked out, finally after extending the web application to new port number and deleting the same, the issue got fixed

Hope this helps others.

News feed error: SharePoint could not retrieve the content. Please try again later

If you see this error message, ther could be an issue with user profile service, Authentication issue and may a with distributed cache.

if you have already checked all of the above and still seeing the same issue, then check the microfeeds list and see whether you are able to see the items in it.

if you are not able to see items in micro feeds list, increase the threshold value of lists from 5000 to 10000 or something...

by default administrators have 20000 has the limit for each list so there will be no issues for administrators on news feeds.

we have figured it out when we see the above error while trying to access "Show all replies" inside a news feed.

Hope this helps others.

Oracle LDAP and SharePoint 2013 integration

I have came across a post for oracle and SharePoint 2013 integration, i think this will help other too.

http://blogs.msdn.com/b/ronalg/archive/2014/04/14/sharepoint-2013-and-forms-based-authentication-configuration-for-open-ldap.aspx

Setting Timespan for forms authenticated user in SharePoint

If you want to make user logout after one min of idle status try the below code, this is only for forms authenticated users.

Run the below script in powershell script

$Data = Get-SPSecurityTokenServiceConfig

$Data .UseSessionCookies = $true

$Data .FormsTokenLifetime = (New-Timespan –Minutes 2)

$Data .LogonTokenCacheExpirationWindow = (New-Timespan –Minutes 1)

$Data .Update() 

Enabling session in SharePoint

Error:System.Web.HttpException: Session state can only be used when enableSessionState is set to true, either in a configuration file or in the Page directive. Please also make sure that System.Web.SessionStateModule or a custom session state module is included in the <configuration>\<system.web>\<httpModules> section in the application configuration.

When you see the above error try the below resolution

Enable-SPSessionStateService -DefaultProvision

I have tried many solutions that are out there on other site but nothing seems to resolve my issue

finally used powershell command and site came up like magic.