Skip to main content

SharePoint Apps Introduction | which you should know before develop with SharePoint App model

With the rise of cloud platform and cloud model (office 365), app model came into conversation with addressing the some of the drawbacks which was with SharePoint custom solutions. Even though there are many disadvantages with the App model solution designers go to this model with the requirement.

Following few points better to know before jump into the model;

  • W3wp.exe – SharePoint worker process which manages solutions which deployed as a farm solution

  • SPUWorkerProcess.exe – worker process which manages solutions which deployed as a sandbox solution

Since all the models which were before running inside the SharePoint, there is high couple and dependencies which can be accounted as a disadvantages.

  • There is possibility of custom codes affect the processes and codes of SharePoint – scalability and environment risks

  • Less ability to upgrade the SharePoint with the tightly coupled behavior and its complex behavior – high dependencies

  • When code running with elevated privilege can do any action which site administrator (security violation with impersonation) can do. Sandbox box solutions scope this impact to some extent but code within the scope will affected – permission issue

  • Sandbox solutions it’s not possible to run code with impersonation and only capable of running codes as current user – impersonation issue

  • Final major problem with the installation and upgrading. This may require restart of IIS on front-end servers – installation and upgrading issue

Impersonation in SharePoint

Running custom codes as an administrator to perform some task which signed in or other users could not perform. This achieved by using SPSecurity.RunWithElevatedPriviledges.

Advantages of SharePoint app model

  • App support for both Office 365 (cloud) and on premise

  • App code runs separately apart from SharePoint environment

  • Code can be run under distinct authentications

  • Apps deployed using app catalog make easier to discover, install and upgrade

  • App code access the SharePoint point across web service entry points

SharePoint tenancy

Set of site collections configured and administered as a set (bundle). Business users who access the tenancy knows a tenants.

When O365 creates new tenancy, it created new administrative site collection with can be accessibly by the tenant administrator.

When deploying apps into SharePoint on premise it takes “default tenancy” where tenancy concept that much not important.

Services which supports for SharePoint app model

App Management Service

It contains configuration data for Apps which installed, configured, permissions and licensing of SharePoint apps. This can be configured manually in the ‘Central Administration’ and it’s already configured in the Office 365.

Site Subscription Setting service

Contains configuration data of every site tenancy and includes those in its own database. This need to be configured using PowerShell and pre-configured in the Office 365.

Scopes of SharePoint Apps (App installation scopes)

1. Site Scope

Launched and installed in the same scope of SharePoint site.

2. Tenancy Scope

App installed in special type of SharePoint site known as “app catalog”. So that users can use the app in site as they prefer. This scope is useful when users in the tenancy can pick the app and use in their site as prefer. Permission handling on app still with the administrator.

There are two isolated places where you can push custom codes to SharePoint. Those are as bellows;

  • Client side – runs on the client’s browser. You could write with JavaScript, Silverlight, VBScript, Flash or whatever client side scripting technique. This always act as a “SharePoint hosted app”

  • Server side – can be write with language like C# and this need to execute code outside the SharePoint host environment. This mostly become a cloud hosted app.

In later post I will be further talking about hosting models, configuration files within the apps, packaging and etc.




Popular posts from this blog

Turn off/ Hide Details panel/ Information Panel on modern SharePoint lists

Not always we require to show changes done by other which is a mandatory feature in SharePoint online. 

What is details pane (aka. Information Pane)? Detail pane/ Information shows information regarding the document if you selected a one or its showing recent changes within a list or library.

Follow linkto Microsoft documentation about details pane.

Bad news: Until Microsoft listen to User Voice, there is no straightforward way to enable disable this even you don't want.
Good news: We could write a SharePoint framework extension to hack styles until Microsoft give us a permanent solution.

How? I found this sample project (Inject CSS into modern SharePoint pages with React) which could reuse to our purpose. Thanks to Hugo for saving my time.  Steps to awesomeness: Clone the projectResolve dependencies > npm iBundle > gulp bundle --shipPackage > gulp package-solution --shipUpload package into SharePoint App catalog and deploy. You could find package under SharePoint folder.A…

PowerApps Delegation warning

Warning:Delegation warning. This part "Filter" of this formula might not work correctly on large datasets. The data source might not be able to process the formula and might return an incomplete data set. Your application might not return correct results or behave correctly if the data set is incomplete
"Working with large datasets requires using data sources and formulas that can be delegated" - PowerApps 

Solution!!!500 is the default number of records to pull, but you can change this number for an entire app. 

By altering the number of delegation queries (not recommended), you will be able to pull items up to 2000 (as of 2018). 
On the File tab, select App settings.Find Experimental features, change the Data row limit for non-delegable queries setting from 1 to 2000.

Data sources that will help with delegation:Common Data Service

Microsoft Ignite Community (FREE) Events #MSIgnite

If you around Microsoft Ignite 2018, don't miss below community (FREE) events. 

Microsoft Ignite Welcome Reception

When: Monday, 5:30p – 7:30pm

Where: Exhibit Hall

Details: Kick off Ignite the right way with Monday’s welcome reception where you can chat with Microsoft experts, see demos, see old friends and make new ones over food and drinks.

PowerShell Community Social

When: Monday, 7:00p – 7:30p

Where: Community Central (OCCC West Hall)

Details: Come have a drink and meet Jeffrey Snover and PowerShell MVPs like Jaap Brasser, Aleksandar Nikolic, and Aaron Nelson immediately following the welcome reception.

Data & AI Community Social

When: Tuesday, 9:00a – 10:00a

Where: Community Central (OCCC West Hall)

Details: Do you do that Voodoo? Well, you can at the Data & AI Community Social. Eric Boyd and Rohan Kumar, along with MVPs Cathrine Wilhelmsen and Melody Zacharias will be there with Voodoo donuts and nitrogen cold brew coffee.

Microsoft Teams Community Social

When: Tuesday, …