How to maintain concurrency in Entity framework?

Question

0.00/5 (No votes)

See more:

In my online exam project there are 4 methods in WCF:

1)GetSections--------------------Select only sections
2)GetExamDetails-----------------Select exam details from db
3)GetQuestionsAndInsert----------Select questions and insert in Exam table
4)UpdateAttempt------------------Update attempts in db

These methods are executed when user click on exam link. When 2 or more users click on that link exam page get load successfully but if 2 users click on same link at same time then any one of then or both get error from above any 1 method. Errors like transaction failed,can not 'read' data while other transaction is running etc.

I used Entity Framework in my project. I know it is concurrency issue but I am not able to resolve it. Please tell me how to manage this problem.

Please reply ASAP.

Thank you.

Posted 6-May-14 19:34pm

MNamrata

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

MNamrata · Accepted Answer · 2014-05-08T01:46:00

C#

My problem resolved. I have declared entity object globally so that I got this error. Now I declare separate object in each method and my problem is solved.
 
Explanation : As entity object is globally declared all methods run on same object. They are not able to do operations on database by same object and transaction get failed.