special character checks

Question

1.00/5 (2 votes)

See more:

I have a field userId where i want validation check for special charaters. i want to restrict user to input any special character.

if user input any special character then a message display.
How can i do it. Please help

Posted 26-May-11 21:34pm

rahul dev123

Add a Solution

Comments

Sergey Alexandrovich Kryukov 27-May-11 13:30pm

It depends also on how data is entered (see suggestions you got). This is not clear from your question. What is it? Overall, you got good solutions, just use the advices.
--SA

4 solutions

Solution 2

You can use this

string strRet
string s = "9!@$%^^quali52ty3"; //This where you can put your characters
foreach(char c in s)
{   
  if (char(13) = c || char('@') // write all the special character you want to show
   {
     strRet =strRet + c;
   }
} 
   lblmessage.text = "This is a special Character. " + strRet

Posted 26-May-11 21:42pm

cuteband

Updated 26-May-11 22:32pm

v3

Comments

rahul dev123 27-May-11 3:50am

if (char(13) = c || char('@') )
this line show error invalid char

cuteband 27-May-11 4:26am

yeah because you have to fix this line
if (char(13) = c || char('@') = c )

Sergey Alexandrovich Kryukov 27-May-11 12:58pm

Fix your own code first! What you right won't even compile. Please check what you post before posting. For now, my vote is 1.
--SA

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)

Deepthi Aravind · Accepted Answer · 2011-05-26T21:53:00

Solution 3

You can use Regular expression validator or filtered textbox extender in ajax toolkit....

Posted 26-May-11 21:53pm

Deepthi Aravind

Comments

Sergey Alexandrovich Kryukov 27-May-11 13:29pm

True, a 5. What exactly to use depends on complexity of the validation rules. Validation step may or may not be needed.
--SA

Legor · Accepted Answer · 2011-05-26T21:39:00

Solution 1

I would suggest you to use a Regular Expression Validator control.

See:
http://msdn.microsoft.com/en-us/library/ff650303.aspx[^]

Posted 26-May-11 21:39pm

Legor

Comments

Sergey Alexandrovich Kryukov 27-May-11 13:27pm

It would work, my 5, but, depending on control, filtering out of characters when a text is edited should also be considered, in replacement or in addition to validation. It depends on complexity of the rules.
--SA

Ashishmau · Accepted Answer · 2011-05-26T22:16:00

Solution 4

instead of restricting special characters...u can allow to enter only numbers or characters..that would be easy.

see this link for more info

http://www.tizag.com/javascriptT/javascriptform.php[^]

Posted 26-May-11 22:16pm

Ashishmau

Comments

Sergey Alexandrovich Kryukov 27-May-11 13:28pm

That is a good suggestion, my 5. However, it may or may not be used with validation. It depends on complexity of the rules. My 5.
--SA