Solve Mongo DB Element does not match any field or property of class


Due to non schema nature of mongodb collection, one collection may contains distinct number of fields.Its not recommended though, its possible to contain different number of fields due to business requirements. So for example say we have a collection “Client”, under which there is 2 document. Second document lacks 1 field “City”. So while binding back to POCO via c# driver , we get exception “Element does not match any field or property of class”.



When a BSON document is deserialized back to POCO, the name of each element is used to look up a matching field or property in the class map, when deserializer do not find  the mapping property its throws an exception, that we have in this scenario. If we want to ignore those extra properties, there is two possible ways, during deserialization or during initialization of the BsonClassMap. I prefer the while I do the mapping, I live to keep my POCO clean.


As you can see the above  code block,  SetIgnoreExtraElements methods is used to specify inside mapping to ignore extra elements from BSON document.


That’s it, now you can work with your POCO more easily.

Gears that will save your time to build a great web application

Template Start-up Kit


POP3/IMAP Library

AddToCalendar – free widget button for event page

Free online tool to unminify

Free online tool for development

Free online tool for RWD Test

Analyze IIS logs using LogParser

How to solve The FastCGI process exited unexpectedly Error


IIS with PHP is not new now days, there is lots of business needs that requires php applications need to host in IIS. Recent times PHP improved a lots in terms of integrating to IIS.Still few times few things fall apart, like the problem we are going to illustrate.


For a recent project I had to configure PHP with IIS 7.0 on Windows 2008 R2. Everything was seems fine, I even added the application pool with “No Managed Code”, configured handler mapping and sit tight to see php running,.

As soon as I hit http://localhost/phpinfo.php and boom, I see this error message.





After lots of googling I find the solution at last, solution was super easy, you have to install Visual C++ Redistributable for Visual Studio from here. Though it was specifically mentioned in the php download section, but I some how skipped that and wasted hours to find a solution.

Problem was PHP as FastCGI with IIS requires you to install the Non-Thread Safe (NTS) versions of PHP. And Recent releases binaries built with Visual Studio 2012 compiler , So while executing you need to have Visual C++ Redistributable for Visual Studio 2012 install in your server where you are trying to execute php scripts. And for proper installation follow these steps. Addition to these instructions you have to add an application pool with “No Managed Code” and Managed Pipeline Mode set to “Classic”. Then Go to “Advance Settings” of newly created application pool and Enable 32bit Application value to “True”

How to solve Log4Net Config Error


While using log4net for logging and using a separate configuration file I encountered a strange error that log4net cant locate the configuration file, even though file and configurations are already there. This problem drive me nuts and finally i found few solutions to fix the problem.

log4net error

Problem Scope

My particular applications is designed as such


So as shown in diagram, several type of app type will hookup with Log4Net wrapper to get logging facility and all logging related logic’s are implemented on Log4Net wrapper. As the problem states every time a client app is trying to invoke log4net wrapper it gets xml configuration error “Check your .config file for the <log4net> and <configSections>….”


There is few problem and few solution, Solution can very on context.

On the client project , select Log4Net config file and set this file to Build Action of Content with Copy to Output Directory of Copy Always.

Another alternative is look for  XmlConfigurator.Configure();. This line is responsible for initiating the log4net. This configuration should exist a single place where logging actually happen, not client app’s.

One of these 2 or both tricks should help to solve this problem.

tea country a weekend getaway

After long work weeks me and my wife decided to take some day off. We are trying to make it a habit of after each 3/4 exhausting work week we go out for a short vacation, not long , max 3 days, and believe me it recharge you like no other thing. Usually our favorite place is beach but this time we decided to take a different route , its rainy season in bangladesh and at this time no other place could be as beautiful as sylhet our one and only tea county. I went to srimangal (a upazila  under sylhet division) several times, but for my wife its a new territory, so I made up my mind I will take her to sylhet first and later of the year may be srimangal.

This post is more or like informative post for new bees, let me try to put together as much as info as possible to aid new visitors.

How to reach sylhet

there is good communication from major citys to sylhet. You will get trains, buses (AC/ No AC). If you are traveling from Dhaka train leaves from Dhaka to sylhet twice a day. And there is several bus services from dhaka to sylhet all day long. I recommend to take Green line bus  , its AC bus, comfortable, good service and fair is also reasonable 900tk, you can take non a/c buses like shamoli/tr paribahan which is non a/c fair is 400tk. You will reach to Humayun Rashid Circle  (HRC) from which you can take CNG (local cabs) or rikshaw to reach your hotel.

Where to stay

Sylhet city is full of hotels ranging from 400tk 10k per night depending on your budget. Good thing is most of the hotles are inside city and easily reachable. I stayed at Hotle Supreme, good service, decent food,  reasonably comfortable rooms.  you can get a a lots of hotel name by googling.

Hotle Supreme, Mirabazar — 01711197012 (cell phone)

Hotel Valley Garden, Bishwa Rd,  —- 0821-727602 (cell phone)

Hotel Garden Inn. Garden Tower, Shahjalal Bridge Link Road — 0 1711271185, 0 821 727284 (cell phone)

Where to eat

For foreigners it could be bit tough to try local restaurants as they serve mostly native and popular local dishes, so I recommend to stick to restaurants within the hotel, for local travelers there is lots of options but i feel it hard to find a decent restaurants  with good quality food. me and my wife tried a few, even some of them get very high recommendation from diff travel sites, but few of them could coupe with reputations, we find the Exotica restaurant within hotel supreme  decent and more or less good quality local food but dont event try the thai/Chinese dishes :). You can try woondal/vojon bari for change of taste

How to roam around

You have to rent a vehicle to roam out side of town , but for roaming inside town CNG/rickshaw is more then fine. CNG and rickshaw fair is reasonable. You can get rented vehicle ambarkhana or madina market area inside town. You can ask your hotels also to arrange a ride for you, but in that case price will be higher. I managed to get a very good driver and guide. He willingly guided the whole tour and take us to places that we don’t know exist inside the city, you can pick him up if he is free, Mr Alamgir– 01712068709 (cell phone)

Places to see

All the photos are taken by my Canon 60D myself, Though I am listing out few places but the on they way to reach these places is as much beautiful as they are.

Malinichora Tea Estate


Malini Chora Tea estate is one of teh most visited tea estate in sylhet, located near to sylhet city, easily reachable via CNG (local name of  CNG driventaxi) or rikshaw







Madhobkunda waterfall
Madhobkunda waterfall


Madhobkunda is one of the larges waterfalls in bangladesh and one of the most visited tourist spot in sylhet. On the way you can see the tea garden, the hills and the zigzag road through the hills. For me best time to visit there is rainy season from june to august, at that time waterfall came with her own strength and beauty……. breathtaking.





jaintapur hill resort
jaintapur hill resort


The resort is is nearly 1h drive from sylhet city and a good place for relaxation, main attraction is you can see 2 waterfalls from maghalaya (india) in distant , two waterfalls, which are ten times bigger than the Madhabkunda falls, will blow your mind! But alas those are in india, so what we can peek those from this resort 🙂









This is a wide canal known as Lala Khal & near zero point with india . It is the source of Sylhet Sand . The attraction of this canal is the water, which differs in colour at different point. In the same canal, you will find blue, green, clear water. No one will believe this without having watch. You cat take a boat ride here , 30min ride will cost 500tk.







situated at the border between Bangladesh and the Indian state of Meghalaya, overshadowed by subtropical mountains and rainforests. Jaflong is famous for its stone collections and is home of the Khasi tribe. On they way to jaflong landscape is breathless, you will often like to get out of ride to actually enjoy the view……………………………….. ohh wait thats what I did





When to plan the trip

In general people come to sylhet at pick season during winter, from october to February, when weather is not much hotter. But I prefer rainy season. During rainy season tea gardens, waterfalls , rivers flourish with beauty, I recommend not no miss that for anything. There is hand full of tour operator available who will arrange the trip for you any time of the season, but my opinion is do some homework about the place and arrange the trip yourself, that’s is much more exciting. At least that’s what I always do. Its a friendly place with friendly people,  give it a try I am sure you will love it.

Day Out At Bangabandhu Sheikh Mujib Safari Park

A safari park is larger than a zoo and smaller than game reserve. Bangabandhu Sheikh Mujib Safari Park is the second  safari park of bangladesh after dulahazra safari part situated in coxbazar.  With a vision of largest sarafi park of asia, 3690 acres are the full size of the entire park. This place is near to dhaka city and can be good candidate for one day tour. It will take 2 and half hour to reach to park from dhaka depending on traffic.

How to reach

The Park is in Gazipur district which is not far from Dhaka city. Best way to get there is to hop on any bus that goes to Mymensingh (ময়মনসিংহ ). After crossing Gazipur chourasta (গাজীপুর চৌরাস্তা ) its a max 40minitues ride till you reach bagher bazar (বাঘের বাজার ) . From here you can find rikshaw/ van to reach safari park, it will take 20/25 mins.


No outside foods/drinks are allowed. Park has its 2 restaurant, which is tiger restaurant and lion restaurant. From this restaurant

DSC05121visitors can see lion/tigers walking around while you enjoy your foods. Food items are limited to biriyani and of good quality. But you can get different types of soft drinks/ ice cream’s/ light foods. Be careful do not throw your food wastage here and there. Though its been instructed but as usual people are doing exactly what are not asked to do.

Costing :

Bus from mohakhali bus terminal to Mymensingh: 240Tk /per person
Ride From bagher bazar to safari park: 40Tk/per person
Safari Park Entry Fee: 50Tk/per person
Safari Park Ride by Bus: 100Tk/per person
Entry fee to the Individual Section Of Park : 10Tk /per person (Till the time of this post there was about 5 parks)
Foods: 300Tk/per person (depending on items)

Visiting Time:

Everyday 9.00 am to 5.00 pm.

Charm City

Very recently for business purpose I had this opportunity to visit maryland @USA,  to be specific balitimore city.  Like always my business or family visit always became visit with pleasure 🙂 and my explorer string hidden inside start poking. To be honest its very hard to find time in business trip but still I haven’t missed any opportunity to explore for sure.

I kept hearing and seeing people all around the city named balimore city as charm city. I was wondering why people call baltimore city charm city,  So I took this noble responsibility on my shoulder and start exploring.

First thing I always do is gather interesting info about places I visit, it keeps me going till end and bond with the place i visit, people I talk with. I know sounds bit unusual but…. hey everyone has own way of keep the dice rolling…. no! 🙂

Baltimore is the second largest seaport in the Mid-Atlantic United States.  Almost a quarter of the jobs in the region are science, technology, engineering and math positions (Of course that’s why I am here).

027 030Wherever you go to city somehow you will see term “charm” used, Its been said during 1975 an attempt to prompt the city’s  image , leaders of the city’s largest advertising agencies come up with this name which is stuck forever and in times became worthy. That city is beautiful,  people are friendly and food is awesome. Lost of activities and place to see for tourists. Like other USA city’s baltiomore people’s are crazy about their home team “Baltimore raven’s”

TSQL function to replace HTML tags with delimiter


Its often needed to remove all html tags for a column(s) from a database table. One way to do is regular expression pattern matching or using a custom function that will hunt down html tags and remove them. In this small post I will demonstrate this second method.

T-Sql Function

Here is a very simple function that replace/remove html tag’s and returns clean texts without using any patterns. Additionally you can pass a delimiter that will replace the html tag’s in-case you do not want to mix everything in one big chunk of text.

CREATE FUNCTION [dbo].[CleanHTMLTags] (@HTMLText VARCHAR(MAX),@ReplaceChar char(1))

SET @Start = CHARINDEX(‘<‘,@HTMLText) SET @End = CHARINDEX(‘>’,@HTMLText,CHARINDEX(‘<‘,@HTMLText)) SET @Length = (@End – @Start) + 1 WHILE @Start > 0 AND @End > 0 AND @Length > 0
IF (UPPER(SUBSTRING(@HTMLText, @Start, 4)) <> ‘
‘) AND (UPPER(SUBSTRING(@HTMLText, @Start, 5)) <> ”)
SET @HTMLText = RTRIM(LTRIM(STUFF(@HTMLText,@Start,@Length,@ReplaceChar)));
SET @Length = 0;

SET @Start = CHARINDEX(‘<‘,@HTMLText, @End-@Length) SET @End = CHARINDEX(‘>’,@HTMLText,CHARINDEX(‘<‘,@HTMLText, @Start))

SET @Length = (@End – @Start) + 1


And thats it. Say you have a table named “PRODUCTS” and that contains a column “ProductDetails” that contains html tags, in our scenario we have to remove all html tags and replace them by comma(,). Utilizing above function we can make the call like this

SELECT [dbo].[CleanHTMLTags](ProductDetails,’,’) FROM PRODUCTS

Resultant data should be a big text respect to each records in “PRODUCTS” table with html tags removed.

Solution To The MSSQL Server “Suspect”


When you see the your database in Suspect mode that a code red situation. Its not something that you face everyday. It can happen, however, most often due to faulty hardware or operational mistakes (like deleting a transaction log file). This post will show how to recover from suspect mode, but still go through SQL-server error logs and find out the root cause of the error.


At start-up, SQL Server attempts to obtain an exclusive lock on the device file. If the device is being used by another process  or if the file is missing, sql server start displaying error.

In these cases, there is usually nothing wrong with the devices and database. For the database to recover correctly, the device must be made available, and the database status must be reset.

Possible reason for changed to suspect mode in sql server can be

  • The system cannot find the file specified.) during the creation/opening of physical device
  • Failed to open device where data or log file resides
  • SQL server went down/restarted in the middle of a transaction causes transactions log to be corrupted
  • SQL server can not access data or log file while coming online , because of you beloved antivirus


To resolve this issue run the commands listed below,

EXEC sp_resetstatus ‘DATABASE_NAME’;

What the above command do is perform a series of step to check the logical & physical consistency of the database and tries to repair. Very first step is to turns off the suspect flag on a database, you can achieve his by using sytem stored procedure sp_resetstatus. Using this procedure change the suspect flag to emergency. Once the database is set to EMERGENCY mode it becomes a READ_ONLY copy and only members of sysadmin fixed server roles have privileges to access it. Then perform a consistency check by executing DBCC command on the master database.  Next step is to rollback any transactions if any are present in the database and bring the database  into Single User mode. Run the repair and finally bring database to Multi User mode.

Remember sp_resetstatus can be executed only by the system administrator. Always shut down SQL Server immediately after executing this procedure.

If the database is still marked as suspect after performing these steps, there may be other problems preventing the database from recovering. At this point, only option left is either restore from a good backup or set the database to emergency mode and use the bulk copy program copy the data out.

TSQL Recursive Split Function


In my last post I showed how to split a string in TSQL. Problem with that splitting is it can split a string if resultant split count is <=2, i.e. it can split only string like “a,b” or “first,last” or “java,c”. But while doing the parsing of  string of whom resultant split count is >2, it wont work. We need more effort to do so.


I am gonna show how to split a string of any number of delimiter and we will recursive function to achieve that. Idea is very simple,  Create a function that will take the input string and get the first index of delimiter and return the string up to first index and insert that first half into a table. Next is find the rest of the string other then first half and call the same function with it. This loop continues until we find there is no delimiter left in string to do further recursive call, so we return the original caller function and all the way to parent function who initiate the recursive call.

Implementation of the above idea is the function illustrated below,

CREATE FUNCTION [GetName] (@StrVal nvarchar(MAX),@delimeter nvarchar(1))
RETURNS @OldNames TABLE (Name varchar(MAX))
DECLARE @SplitVal nvarchar(MAX);
DECLARE @RestOfTheStrVal nvarchar(MAX);
SET @SplitVal=LTRIM(SUBSTRING(@StrVal, 0,CHARINDEX(@delimeter,@StrVal)));
SET @RestOfTheStrVal=LTRIM(SUBSTRING(@StrVal, CHARINDEX(@delimeter,@StrVal)+1,len(@StrVal)));

IF CHARINDEX(@delimeter,@RestOfTheStrVal)<=0
INSERT INTO @OldNames(Name) SELECT @SplitVal ;
INSERT INTO @OldNames(Name) select @RestOfTheStrVal;
INSERT INTO @OldNames(Name)
SELECT @SplitVal
SELECT Name FROM dbo.GetName(@RestOfTheStrVal,@delimeter)

And this time  let me remind you this solution is applicable  if you have a string with a single delimiter (means you can use only one delimiter). Though its returns resultant strings as a tabular format, its quite handy for situation like I explained above.