Regular expression to validate interest that get from user.it need only to allow only one specific special character(%) and numbers in ASP.NET VB

Question

0.00/5 (No votes)

See more:

  <div class="row">
   <div class="medium-6 columns">
  Current Interest (APR) that you pay
  <asp:RegularExpressionValidator ID="rgv2"
           ControlToValidate="txtCurrentInterest" runat="server"
           ErrorMessage="Interest be in numbers" ValidationGroup="vgSubmit"
           ValidationExpression="^\d+%?$">*</asp:RegularExpressionValidator>

  <asp:RequiredFieldValidator ID="rv6" runat="server" ControlToValidate="txtCurrentInterest" ErrorMessage="Current Interest is Required" ValidationGroup="vgSubmit">*</asp:RequiredFieldValidator>
    <asp:TextBox ID="txtCurrentInterest" runat="server"></asp:TextBox>
   </div>
</div>

What I have tried:

i want to get interest value from users through asp.net textbox. it accepts numbers and optional to enter "%" only. prohibit to enter any other special characters or any alphabet letters.

Posted 26-Jun-19 19:23pm

Member 13596072

Updated 26-Jun-19 23:54pm

Add a Solution

Comments

OriginalGriff 27-Jun-19 1:30am

And?
What happens that you didn't expect or doesn't happen that you did?
What did you do to make that happen?
What have you tried to fix it?
Where are you stuck?
What help do you need?

Use the "Improve question" widget to edit your question and provide better information.

Member 13596072 27-Jun-19 2:52am

my regular expression equation doesn't work it block "%" also

OriginalGriff 27-Jun-19 3:32am

What do you mean, exactly?
Remember that we can't see your screen, access your HDD, or read your mind - we only get exactly what you type to work with.

Your regex as shown will allow "1", "12", "1%", "12%", and so on - but not "%" on it's own. So what - exactly - did you expect it to do?

Member 13596072 27-Jun-19 5:44am

i need to allow like 13.52% or 13.52 or 1.3 or 1.3%

Patrice T 27-Jun-19 6:05am

Use Improve question to update your question.
So that everyone can pay attention to this information.

2 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)

Patrice T · Answer 1 · 2019-06-26T23:28:00

Quote:
Regular expression to validate interest that get from user.it need only to allow only one specific special character(%) and numbers

Beware, loan interests are usually non integers 2.4%
You should give examples of what is valid input and what is not, bacause your RegEx look Ok to me.

Just a few interesting links to help building and debugging RegEx.
Here is a link to RegEx documentation:
perlre - perldoc.perl.org[^]
Here is links to tools to help build RegEx and debug them:
.NET Regex Tester - Regex Storm[^]
Expresso Regular Expression Tool[^]
RegExr: Learn, Build, & Test RegEx[^]
Online regex tester and debugger: PHP, PCRE, Python, Golang and JavaScript[^]
This one show you the RegEx as a nice graph which is really helpful to understand what is doing a RegEx: Debuggex: Online visual regex tester. JavaScript, Python, and PCRE.[^]
This site also show the Regex in a nice graph but can't test what match the RegEx: Regexper[^]

OriginalGriff · Answer 2 · 2019-06-26T23:55:00

Quote:
i need to allow like 13.52% or 13.52 or 1.3 or 1.3%

Then you need to tell us that, don't you! We really can't read your mind...
Try:

^(\d+(\.\d+)?)%?$

If you want to use Regular Expressions, then get a copy of Expresso[^] - it's free, and it examines and generates Regular expressions.

Regular expression to validate interest that get from user.it need only to allow only one specific special character(%) and numbers in ASP.NET VB

2 solutions

Solution 1

Solution 2

Add your solution here

Preview 0