Abhijit Jana

Technology Leader, Technical Strategist, Solution Architect, Development Consultant, and Trusted Technology Advisor with more than 17 years of experience in the IT industry with expertise in Development, Architecting, Engineering, Consulting, Services Delivery and Leadership. I am a former Microsoft MVP, Author of "Kinect for Windows SDK Programming Guide" and "HoloLens BluePrints" books, and founder of The Daily .NET Tips. To know more about me visit the "About Me" page.

Download PPT – “Caching Enhancement in ASP.NET 4.0” – Virtual Tech Days – 9th Feb 2011

by Abhijit JanaFebruary 9, 20115 Comments

Today I delivered an 1 hour session on “Caching Enhancement in ASP.NET 4.0” at Microsoft Virtual Tech days 2011. It was the Day 1 of Virtual Tech Days and I presented the 4th session on Developer Track 1, from 3.00 PM To 4.00 PM IST. Thanks to all of you for attending my session. In this session I have discussed about ASP.NET 4.0 Caching Enhancement . I started with fundamentals of ASP.NET Caching to make sure all the attends are in same page. In Caching Quick Tour section I have talked about why Caching ? What are the different types of caching ? How Caching works ? etc. Then I have discussed about New Object Caching API in .NET 4.0. In this section I have talked about new Memory Cache API, there Implementation using System.Runtime.Caching . I have also shown how we can use same set of API in an Winforms / WPF / Console Application. Followed by, I have explained how we can extend the Object Caching by implementing MemoryCache Class.

Microsoft Virtual Tech Days – 9th to 11th Feb 2011

by Abhijit JanaFebruary 3, 20114 Comments

The 11th edition of Virtual TechDays – being held on 9th to 11th Feb 2011. I am glad to say that, I will present a session on “Caching enhancements in ASP.NET 4.0” on 9th Feb 2011 from 3 PM to 4PM (IST) . ASP.NET 4 introduced an extensibility on output caching where developers can create their own custom cache provider to store the cache data in out of process. Output-cache providers can use any storage mechanism like database, file system, cloud etc. to persist output cached content. In this session I will be discussing the enhancement of ASP.NET 4.0 Caching by creating different custom cache provider for different type of output caching.

This is an live meeting event. You can attend it from any where. To register for this event click here . Find all the details agenda from here .

Tune in for a demo filled session.

How to make ViewState secure in ASP.NET ?

by Abhijit JanaJanuary 26, 2011January 26, 20114 Comments

The ASP.NET ViewState is a client side state management. ViewState is stored in hidden field with ID named __VIEWSTATE. Typically, stored ViewState information looks as below:

Now let us look at the value. It looks likes an encrypted string. This is nothing but Base64 Encoded string and it is not an encrypted string. So it can be easily decoded.

The main reasons for making it Base64 encoding are as follows:

1. Base64 makes a string suitable for HTTP transfer

2. It makes it a little harder to read .

But people often get confused that this is an encrypted string.

Details explanation on Compression Enabled Session for SQL Server and State Sever Session Mode in ASP.NET 4.0

by Abhijit JanaJanuary 19, 2011January 26, 20119 Comments

While we are talking about state management we consider Session is one of most useful server side state management mechanism for a web application. In ASP.NET mainly we are having two type of state management 1. In Process and 2. Out Process . “In process” is the by default session storage mode for ASP.NET Web application and this is taken care by worker process in IIS. When it comes under Out Process we can use either of state server or SQL Server to persist session data. In case of In Process, session data stored in In memory of worker process. But when we are talking about “OutProc” session mode, we need to ensure that session data should be “Serialized” first . So, when we are moving session data from Web Server to Out Process Server ( State Server or SQL Server ) it can be a performance overhead based on the size of data that we are storing in Session.

ASP.NET 4.0 comes with a new option for compressing the Session data with Out Process Session mode. To enabling this functionality we need to add “compressionEnabled=”true” attribute with the SessionMode in web.config .

Read More “Details explanation on Compression Enabled Session for SQL Server and State Sever Session Mode in ASP.NET 4.0”

Use shortcut key to generate GUID very quickly in Visual Studio

by Abhijit JanaJanuary 18, 2011January 18, 20116 Comments

One of the common tasks involved in the development is GUID’s generation. This is even more frequent when we are working on a SharePoint solutions. Even during writing unit test we need to generate static GUID to validate data’s. Visual Studio comes with a tool called guidgen.exe ( c:\program files (x86)\microsoft sdks\windows\v7.0a\bin\NETFX 4.0 Tools\guidgen.exe ) which is registered with visual studio as an external tool and invoked from Tools > Create GUID. But whenever you need an unique static GUID you have to navigate to tool and copy the ID evertime. Last few days of my development involved with lots of GUID generation where I found it’s taking time to generate so many guid’s. So, I came up with an small approach where we can generate a GUID by just pressing some shortcut key. Behind the seen I wrote a macro for the same and that is being triggered with the key press.

Programmatically Changing Session State Behavior in ASP.NET 4.0

by Abhijit JanaJanuary 15, 2011January 15, 20119 Comments

Session is one of most important state management in ASP.NET. We can enable or disabled session state either in web.config or using @Page directive’s EnableSessionState attributes. But there was no provision to change the session state at runtime till date in ASP.NET. But using ASP.NET 4.0, we can change the session state programmatically . The .NET 4.0 framework adds a new method SetSessionStateBehavior to the HttpContext class for ASP.NET. This method required SessionStatebehavior value to set the current session mode. To call SetSessionStateBehavior simply create a new HttpModule by Implementing IHttModule and hook the BeginRequest event. Most important you can only use the SetSessionStateBehavior until the AcquireRequestState event is fired, because AcquireRequestState Occurs when ASP.NET acquires the current state that is associated with the current request

While calling SetSessionStatebehavior, You can pass the following values as SessionStatebehavior :

Default: This is default setting which means everything works as before
Disabled: Turned of Session Sate for Current Request.
ReadOnly: Read only access to Session State;
Required: Enabled session state for both Read and Write Access;

When we can use HttpContext.Current.Items to stores data in ASP.NET?

by Abhijit JanaJanuary 14, 2011January 15, 201110 Comments

To answer this question In a single statement, you can use HttpContext.Current.Items for very short term storage. By Short term storage means, this data is valid for a single HTTP Request. There are many confusion around regarding storing data in HttpContext.Current.Items and storing data in Session variable. In this blog post I am going to describe what are the different scenarios where we can use HttpContext.Current.Items and what is the exact difference with session variable.

Items collections of HttpContext is and IDictionary key-value collections and that are shared across a single HTTPRequest. Yes, HttpContext.Current.Items valid for a single HTTPRequest. Once after processing, server information is sent back to the browser, the variables that were set in the Items[] collection will lost. Where as for Session Variable, information valid for multiple request as this is user specific. The session variable only expires either on Session Time Out or explicitly clear the values.

Exception Occurred ? – Get Troubleshooting tips from your favorite blogs

by Abhijit JanaJanuary 7, 2011January 27, 20115 Comments

In this blog post, I am going to share a quite interesting tips, where you can customize the “Exception Assistant” in visual studio. I have explained how we can use this features for an custom exception class, where we want to provides custom or additional help information . As an example, I have shown how we can set some favorite blogs urls in troubleshooting tips section.

Code Project Most Valuable Professional (MVP ) – 2011

by Abhijit JanaJanuary 4, 2011January 27, 20113 Comments

I have received an MVP Award for 2011 from Codeproject.com . This is my third time in a Row I am receiving the prestigious award from CodeProject. I have been awarded MVP from Codeproject for my article contribution and the responding to the technical answer in ASP.NET and C# Forums .

I would like to congratulate to all the Code Project MVP - 2011

You can find the list of all MVP’s from Code Project MVP 2011

Thanks to all of you for support and great feedbacks on my posts.

Video Webcast: 10 Tips you should know about “Watch Window” While debugging in Visual Studio

by Abhijit JanaJanuary 3, 2011January 27, 20118 Comments

Few months back I have published an article on 10 Tips you should know about “Watch Window” While debugging in Visual Studio , where I have explained about 10 useful tips on watch window. Here I am sharing you the quick video webcast on that.

My Blog 2010 in review by WordPress.Com

by Abhijit JanaJanuary 2, 2011January 27, 20113 Comments

Just received an review email from WordPress .com Team on my blog over year 2010. Sharing with all of you !

Your 2010 year in blogging

Happy New Year from WordPress.com! To kick off the year, we’d like to share with you data on how your blog has been doing. Here’s a high level summary of your overall blog health:

Healthy blog!

The Blog-Health-o-Meter™ reads Wow.

We think you did great!

Tips from Daily .NET Tips – Week 1

by Abhijit JanaJanuary 1, 2011January 1, 2011Leave a comment

Here is the quick reference of Week 1 .NET Tips from http://dailydotnettips.com .

Generate Method Stubs using Shortcut Key in Visual Studio

In this tips I have shown how you can generate a method stub using shortcut key

Calling Methods From Watch Window

From this tips you will get to know how you can call a method from watch window

Conditional Breakpoints with Method Calling in Visual Studio

Know how you can use some return value from a method with in conditional breakpoints.

Know when your application pools recycling in IIS 7.5 – Log an entry in Event Viewer while recycling

In this tips you will learn how you can log information in event viewer whenever application pool getting recycle

How to count number of active session for State Server Session Mode ?

Know how to count number of active session from State Server session using Performance Monitor tool

How to calculate Session data size for SQL Server session mode?

In this tips I have show, how you can calculate the session data size in SQL Server Session mode.

To learn daily .NET Tips like this, visit http://dailydotnettips.com and follow @DailyDotNetTips

Thanks !

I wish you a Happy New Year 2011

by Abhijit JanaDecember 31, 2010December 31, 20104 Comments

Wish you and your family a very happy and prosperous New Year in year 2011. May this new year bring many opportunities your way to explore every joy of life. I Hope this New Year fills your life with happiness and perfect health always, much more success and happiness.

As we wind up with year 2010, I would like to express my sincere thanks to all the visitors, readers, followers of my blog for their encouragement, feedbacks and support. Please keep visiting and send me your feedback. Based on your feedback, I have launched another site Dailydotnettips.com explicitly for .NET Tips.

In a personal note, one of my best moment in year 2010 was getting married with Ananya.

There are many new things coming at “Abhijit’s World of .NET” for all of you in year 2011. So, Keep visiting here and follow me @AbhijitJana for quick update.

Again, Thanks you and a very very happy new year 2010 !

Thanks !

.NET Tip a Day, Keeps painkillers away! – Live at http://dailydotnettips.com – 27th Dec 2010

by Abhijit JanaDecember 27, 2010December 27, 201013 Comments

Finally I have finished with designing, developing and deployment of my new web site for “Daily .NET Tips” and this is now live at http://dailydotnettips.com . A single tip can improve productivity of work while coding. Daily .NET Tips is aiming to sharing useful coding tips and tricks for .NET Developers. This site completely design for sharing Tips and Tricks, useful Code Snippet which anyone can use in their daily development work. I had this plan for a long time for launching this site after seeing great response on my different tips at my blog itself. Finally It’s done.