problem with textbox in windows applications. it's urgent please

Question

0.00/5 (No votes)

See more:

hii

i am able to enter charecters and digits, if i enter both charecters and digits then only the form should submit otherwise it shouldn't. suppose if i enter complete charecters or if i enter complete digits the form should not submit.....if i enter both only the form should submit in windows based applications

Thank you

Posted 4-Oct-12 1:41am

mahesh_chs

Add a Solution

Comments

[no name] 4-Oct-12 7:45am

If it was so "urgent" then you should have taken the time to clearly define what it is that you are trying to do and included the code that you are having trouble with. "enter complete charecters or if i enter complete digits the form should not submit", is complete nonsense. How are you entering incomplete characters or digits?

mahesh_chs 5-Oct-12 5:58am

hii thanks OriginalGriff
the problem was solved

4 solutions

Solution 4

Something I learned from a recent answer I gave is you can use zero-width negative lookahead to introduce assertion into your regular expressions.

Try this regular expression:

(?!^[a-zA-Z]+$)(?!^[0-9]+$)^(?:[a-zA-Z0-9]+)$

For an explanation see this answer: http://www.codeproject.com/script/Answers/Post.aspx?aid=469314[^].

The regular expression above will forbid strings being made of only digits or only of characters, but will gladly accept a mixture of both.
In my previous solution I also had to use quantifiers, but you've not mentioned any limits on the length of the validated string, so I left it out. You can easily see how this is done from the solution I pointed you to.

Regards,

— Manfred

Posted 4-Oct-12 4:05am

Manfred Rudolf Bihy

Updated 4-Oct-12 4:06am

v2

Solution 3

Use the keydown event with two bool values one for numeric and one for alphabets, with the help of key down or key press event assign value true if you get number and alphabets. while clicking on submit button check that you have true values of bool variables if not the ask user to enter number and alphabets both.

Thanks,
Ambesha

Posted 4-Oct-12 3:53am

Ambesha

Solution 1

Handle the one of KeyDown / keyPress events of the textbox and validate the text for numbers and text together.
If both of them are not present, don't enable the submit button.

Posted 4-Oct-12 1:46am

Abhinav S

Comments

fjdiewornncalwe 4-Oct-12 10:01am

Simple and effective.

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 · Accepted Answer · 2012-10-04T01:48:00

Solution 2

I would create two regexes: one for any letter, one for any digit.
Only if both match does it validate.

C#

string instr = "abc123";
Regex letters = new Regex("[a-zA-Z]");
Regex numbers = new Regex("[0-9]");
if (letters.IsMatch(instr) && numbers.IsMatch(instr))
    {
    ...
    }

Posted 4-Oct-12 1:48am

OriginalGriff

Comments

mahesh_chs 5-Oct-12 5:58am

Thanks