Need a code for String matching

Question

0.00/5 (No votes)

See more:

In my project,(e-learning tool) I stored questions and correct answers in SQL data base table(More than one word separate in space). Questions are lorded in a text box once at a time.If i want go for next question need click next button. then the next question is lord the same text box .Then student can type relevant answer in another text box. Then I have to match that given answer with the correct answer in data base.could you please give me a sample code for that in ASP.net C#

Posted 18-Aug-12 23:14pm

Sandamini2012

Add a Solution

Comments

Kuthuparakkal 19-Aug-12 5:17am

What have you tried so far ? Is this an homework ?

ridoy 19-Aug-12 6:27am

There will be several string patterns that you will need to match user's answer with your database data..now question is which pattern would you follow?show some code of you..then we will understand

3 solutions

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)

OriginalGriff · Answer 1 · 2012-08-18T23:28:00

This is not a question we can answer: it gets horribly complicated, depending on what you personally consider to be a "right" answer.

Suppose the question and answer in your DB are:

"What car is that?"
"Mercedes CLK550"

What do you allow as a "correct" answer?

"mercedes clk550"
"Mercedes CLK 550"
"clk550"
"MERCEDES"
"CLK 550 mercedes"

All five of them are technically correct answers.
How about:

"Mmercedes clk550"
"Merkedes CLK 550"
"clk-550"
"MERC 550"
"CLK%%) mercedes"

Which are pretty close?
And that is only with a simple, direct question with a fact as an answer.

As soon as you start allowing text based answers, you open up a world where the user is going to get frustrated because either your definition of "correct" is too narrow, and requires him to enter exactly what you have in the database, although he doesn't know what you have in the database and must guess, or you software has to be extremely clever and work out what he meant by his answer rather than exactly what he wrote.

It's possible - google does it all the time - but it is far, far too big a question for a simple answer here!

**Zoltán Zörgő** · Answer 2 · 2012-08-18T23:33:00

Open ended questions are really hard to evaluate automatically. First of all because in most cases there are several correct answers - in rare cases is the test writer able to think of all possible formulations, that could be acceptable at that point. Of course, there are cases, where only one exact answer is good, like with some grammatical assessments. But in general these kind of test items are evaluated by the instructor or, if there is no such possibility, other kind of tests are used.
But if you stick to what's in the question you posted:

C#

string CorrectAnswers=...; // load the spcae separated list
string AnswerGiven =...; // the answer you got

if(CorrectAnswers.Split(' ').Any(x => x == AnswerGiven))
{
  // the answer given is one of the acceptable answers
}

Andreas Gieriet · Answer 3 · 2012-08-19T03:20:00

Make multiple-choice for questions with fuzzy answers.
Open questions in e-learning tools is a pain: either you expect literally exact answers (like giving a number = no problem to exactly match) or you need to invent some kind of heuristics to "interprete" the entered phrase.

Text correlation algorithms do not work since you first had to filter out "filler" words and compare the rest by *correlation* to the correct answer. If you want to cover typos that have no semantic relevance, you must be very smart (BTW: which typos are semantically relevant and which are not?).

So, why all that pain that may even lead to wrong rating due to the inherent character of heuristics (they work most of the time but not not always...)?

Summary:
- Allow only textual user entry if it is an exact answer (e.g. exact number).
- Go for multiple-choice if you aske questions that may lead to fuzzy answers.

Cheers
Andi

Need a code for String matching

3 solutions

Solution 1

Solution 2

Solution 3

Add your solution here

Preview 0