Wednesday, November 28, 2018

Collection constructor with collection initialzer

You can pass anything that is a valid constructor parameter. For example, List permits construction from any enumerable, so you can do this:

this combination notation is useful if you want to clone an existing collection and then make some tweaks to it.

Wednesday, November 14, 2018

Real world Use Case Linq Aggregation

Problem statement

We want to process numbers and categorized them into categories. This could be any data and we want to classify them based on requirement. Just to create small proof of concepts here is the sequence of numbers and idea is to classify them into even, odds and so on.

Solution Statement

Linq Aggregate with Union to show them all.

Class Diagram

Implementation Details

Number Class

Enum NumberType 

NumberGroup Classes


NumberFilter Class

Main Calling Function
This is it!

Wednesday, September 19, 2018

OneNote Immersive reader Microsoft learning tool

It is one of the amazing tool or add ins for OneNote users. This is very helpful for students and content author to proof reads or improve their language skills.

Long Story short.

Install this plug-ins free of charge if you are OneNote user.

Thursday, May 17, 2018

Azure AppInsight Custom Logs Alerts at very granular level with queries


An alert service has become more powerful day by day due to advent of Azure AppInsight. Microsoft is actually listening to developer and support/operation  aka (devops) team very closely. Now we can get alert at very granular level. Whenever you performance test or UAT testing it is good to enable sitecore logs trigger straight into your mail box or into slack or any web hooks. It is easy done. I keep this demonstration simple . I injected simple trace sitecore logs query which will be triggered every 10 mins if error count greater than 1.

Open your Applnsight blade, look for Alert and add new alert . Below screenshot is self explanatory.

Cool part about it you can add any level of AppInsight Analytics query in it. It is very flexible.

| where message contains "ERROR"

Monday, April 9, 2018

Custom Attribute ValidateApplicationPermission 403 Access Denied Leak and MVC filters

This is always the case when we write some custom filter without being understanding the sequence which we should be using.

One classic example is to handle custom Unauthorized Access for application permissions at Controller Action level. Say if it user has authorization of application but some of the permission is not allowed and still it executes controller-action then it is a serious issue.



Problem Definition: 

ValidateApplicationPermission results into 403 access denied leak. It captures access denied and tries to redirect however it is redirecting with executing existing action filter which it should not suppose to be.

For. Eg
Using something like this, here we are trying to use filterContext with HttpContext


Use filterContext with its Result, obey filters and its context.
filterContext.Result = new RedirectResult(Entities.Constants.Entities.Content.Something.Home._403.Path.GetSitecoreItemUrlPath());

Implementation Code Base

Wednesday, April 4, 2018

Awesome-ness of AppInsight Analytics and Failure Preview

The Microsoft Azure AppInsight has made so much easy for us to trace the request execution sequence for any exception traces. You can actually see how the request has been executed for given exception. This way it is very easy to troubleshoot and fine actual root cause of the problem.

Check out for following stuff in Azure AppInsight

  • Failure (Preview)- New feature within AppInsight
  • Operation Id- Locate operation id for any specific exception
  • Open up AppInsight Anaytics query analyzer to view the sequence trace leading to an exception.

 Failure (Preview) Blade

  • Lookup for Count(Failed) vs total request
  • Top 3 Response Codes
  • Top 3 Exception Types
  • Last 24 hours or custom date filter. Slide through graph date statistics. Awesome-ness
  • Operations vs Dependencies vs Exceptions tabs
  • Nevertheless View in Analytics 

Suggested- Click on one of the exception to view Operation ID and from this operation id you get all trails and missing piece of an issue.

End to End transactions


Tuesday, March 6, 2018

Sitecore MVC Routing using sitecore pipelines approach

Case Study:

It is very important to separate CMS and CD level MVC routing . When we deploy CD content delivery for any web then it should have very specific routing for the web and most of the cms specific routing should be entrusted to cms solution. It is simple you move all the cms level custom route to custom library and later reference and allow to run at runtime using config patch specific to environment. Like SiteSetting.CMS.Config vs SiteSetting.CD.Config this is will part of continous deployment where it will be picked up during depployment to specific cms and CD environment. By doing this we are separating the responsibility and it help maitain consistent approach specific to cms and cd. This also good for performance of application and it will not conlict with web solution specific to its functionality.

CD with specific to web page
Say which internally call api via ajax -xhr request say

CMS with specific to admin or shell page
http://abc.cms/sitecore/admin/api/user this is very specific to cms

Now when you are employing this solution in MVC ensure it is separated for each of this environment. The cms web server will have routing logic loaded at runtime specific to its env without adding extra overload to web CD environment.

Implementation Logic