password validation in vb.net

Question

0.00/5 (No votes)

See more:

VB

how to validate the password (strong password having atleast 1 charecter 1 number and 1 special charecter) in vb.net

Posted 21-Mar-12 0:55am

silverswim_1987

Add a Solution

2 solutions

Solution 1

The easiest way is to use a regular expression to check if the entered password is valid. The expression ((?=.*\\d)(?=.*[A-Za-z])(?=.*[@#$%])) will check if the entered password contains at least 1 number(?=.*\\d), 1 letter(either upper or lower case(?=.*[A-Za-z]) and 1 character in the list (?=.*[@#$%]).

Posted 21-Mar-12 1:07am

Wayne Gaylard

Comments

silverswim_1987 21-Mar-12 13:15pm

i didnt understand

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)

Jαved · Accepted Answer · 2012-03-26T02:46:00

Hi,
Here is the code Which dont use RegEx (Regular Expression)-

VB

Dim i,j,k As Byte
Dim c as Char
   For Each c In Textbox1.Text
       If Not Char.IsLetterOrDigit(c.ToString(),0) Then
       'Will count special characters
       i += 1
       ElseIf Char.IsLetter(c.ToString(),0) Then
       'Will count characters
       j += 1
       ElseIf Char.IsDigit(c.ToString(),0) Then
       'Will count numbers
       k += 1
       End If
   Next
    
       If i >= 1 and j >= 1 and k >=1 Then
       MsgBox("Password is Strong")
       Else
       MsgBox("Password is Weak")
       End If