I'm trying to validate an ASP TextBox that can only have 1-2 digits (not zero) using the following regex:
^[1-9]{1,2}
This regex doesn't validate if the field is empty (assumed it would due to the 1-2 part)
Also tried ^[1-9+]{1,2} to no avail.
These are my controls:
<asp:TextBox ID="txtInHour"
MaxLength="2"
runat="server"
Text='<%# Bind("InHour") %>'
Width="80"/>
<asp:RegularExpressionValidator ID="rvInHour"
ControlToValidate="txtInHour"
Display="None"
ValidationExpression="^[1-9]{0,2}$"
runat="server"
ErrorMessage="InHour is incorrectly formatted." />
The first thing I notice is that you don't allow zeros in your pattern. So 10 or 20 is not valid? The second thing is that you start with "starts with" AKA "^" but there's no "ends with" AKA "$"
So.. try this:
^[1-9][0-9]?$
In human readable:
starts with 1-9, followed by an optional digit from 0-9, end of string.
On the other hand I don't know what you've meant with ("no zeros") - no zeros at all?!
I found out that for some reason RegularExpressionValidators don't work when there's no input to match against (blank fields) so I had to use a seperate RequiredFieldValidator. Thanks for your input everyone!
You can use this regex :
^([1-9]|[1-9][0-9])$
Related
I am trying to implement this rule with regex : "The name at asp:textbox that is given as input by a user must not contain any spaces as well as any of the following characters:"
`~!##$%^&*()=+[]{}\|;:'",<>/?_ .
And also the length must not be greater than 15.
I am using something like this:
<asp:RegularExpressionValidator ID="validateName" runat="server" Text="*" ValidationExpression="(?=^.{1,15}$)(^(([a-zA-Z]|[a-zA-Z][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)*([A-Za-z]|[A-Za-z][A-Za-z0-9\-]*[A-Za-z0-9])$)" ControlToValidate="txtName" Display="Dynamic" SetFocusOnError="true" ValidationGroup="Wizard"> </asp:RegularExpressionValidator>
BUT the problem is that test12. is not valid (right) and test12.test.something is passing, which is not right for my issue.
Also I tried this regex without result as asdasdads.gr passes (not right):
(?=^[A-Za-z0-9\-]{1,15}$)
Maybe I made it too complicated and now I am getting stuck.
Since your requirements are:
No characters from this set: `~!##$%^&*()=+[]{}\|;:'",<>/?_ .
And also the length must not be greater than 15.
You may just use a negated character class with {1,15} limiting quantifier:
ValidationExpression="^[^\][^`~!##$%^&*()=+{}\\|;:'",<>/?_\s.]{1,15}$"
See regex demo. We must escape the \ symbol and we need to escape the ] symbol (as it can be used by JS engine). Since the \ is used to specify escape sequences, escape it, too (use double slashes to denote one literal \). Note you need to serialzie the double quote as " (or use a hex representation for a regex - \x22) if you are using it inside some HTML attribute.
Detailed explanation:
^ - start of string
[^\][^`~!##$%^&*()=+{}\\|;:'",<>/?_\s.]{1,15} - 1 to 15 characters (due to the limiting quantifier {1,15}) that are not in the defined set (a [^...] is a negated character class). If you plan to allow empty string, use {0,15} quantifier.
$ - end of string
In the comments we discussed trying only searching for valid characters.
[A-Za-z0-9\-]{1,15}
This should work for "test12" if you need "test12." just add the full stop in there. Also \d is for digits instead of using 0-9
[A-Za-z\d\-\.]{1,15}
if you want to allow it to have an optional full top at the end use the following regex. The ? means 0 or 1.
[A-Za-z\d\-]{1,15}\.?
Example Here
Finaly this worked for me:
ValidationExpression="^[^\][^`~!##$%^&*()=+{}\\|;:'\x22,<>/?_\s.]{1,15}$"
Full code:
<asp:TextBox ID="txtHostname" runat="server" CssClass="NormalTextBox" Text=""></asp:TextBox>
<asp:RequiredFieldValidator ID="HostnameValidator" runat="server" Text="*" Display="Dynamic"
ControlToValidate="txtHostname" meta:resourcekey="HostnameValidator" SetFocusOnError="true"
ValidationGroup="VpsWizard">
*
</asp:RequiredFieldValidator>
<asp:RegularExpressionValidator ID="valCorrectHostname" runat="server" Text="*" meta:resourcekey="valCorrectHostname"
ValidationExpression="^[^\][^`~!##$%^&*()=+{}\\|;:'\x22,<>/?_\s.]{1,15}$"
ControlToValidate="txtHostname" Display="Dynamic" SetFocusOnError="true" ValidationGroup="VpsWizard">
</asp:RegularExpressionValidator>
Here I have a MaskedEditExtender, with a validator using a regex.
It validates phone numbers with 8 or 9 digits:
<asp:TextBox Style="width: 135px" ID="txtTelefone" runat="server"></asp:TextBox>
<ajaxToolkit:MaskedEditExtender
ID="MaskedEditExtender_Telefone"
TargetControlID="txtTelefone"
runat="server"
Mask="\(99\)9999NN9999"
OnInvalidCssClass="txt-TextBox-Error"
ValidateRequestMode="Enabled"
ErrorTooltipEnabled="True"
Filtered="-"
PromptCharacter=" "
ClearMaskOnLostFocus="false"/>
<ajaxToolkit:MaskedEditValidator
ID="MaskedEditValidator_Telefone"
runat="server"
ControlExtender="MaskedEditExtender_Telefone"
ControlToValidate="txtTelefone"
ValidationExpression="^\(\d\d\)\d\d\d\d+-\d\d\d\d$"
Display="Dynamic"></ajaxToolkit:MaskedEditValidator>
The issue is: as you can see in the regex, the user can put 4 or 5 digits between the ')' and the '-'.
But the "Mask" field doesn't allow it.
I need the MaskedEditExtender to stop crying when I don't type all the characters, because they're not necessary. All I need to validate my field is the regex.
The MaskedEditExtender is there only to give a mask that allows me to type only numbers and have a (99) in the beggining. It does not need to validate anything.
Well, seems like there's no such functionality in MaskedEditExtender that allows you to put less than the characters in the mask, so I did a small workaround:
I've put autocomplete in the mask, adapted the regex to accept an empty space in the end of the string and trimmed it everytime I wanted to use the TextBox's value.
In MaskedEditValidator:ValidationExpression="^\(\d{2}\)\d{4,5}-\d{4} *$"
In MaskedEditExtender:AutoComplete="true" AutoCompleteValue=""
In CodeBehind: txtTelefone.Text.Trim();
With this, all unfilled characters will be replaced as space in the end of the string, the regex will take care of the validation, and the Trim() will remove the spaces. Thus allowing you to make the Mask's length optional.
Set ClearMaskOnLostFocus="true" on MaskedEditExtender.
I'm currently coding a ASP.NET web application using VB.NET. I'd like to know how to limit the input of the regular expression validator to numbers only (with specific number of digits e.g 7-20 digits).
You can use curly brackets in regular expression to limit like this
^[0-9]{7,20}$
This will limit it from 7-20 digits. For detail explanation see this link
http://msdn.microsoft.com/en-us/library/ms972966.aspx
<asp:RegularExpressionValidator ID="req" runat="server" ErrorMessage="hi"
ControlToValidate="txt1" ValidationExpression="^[0-9]{7,20}$">
</asp:RegularExpressionValidator>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
This is an another way to allow numeric only with minimum 7 and maximum 20 characters
Use this
ValidationExpression="^[0-9]{7,20}$"
So how do I add that it should not have empty field in this same line including my other validation for alphanumeric reg ex.
^[A-Za-z0-9 _]*[A-Za-z0-9][A-Za-z0-9 _]*$
I tried this and didn't work
^[A-Za-z0-9 _]*[A-Za-z0-9][A-Za-z0-9 _]*$ | /\S/
This is for validation controls
<asp:RegularExpressionValidator id="userLocationValidation" runat="server"
ControlToValidate="userLocation"
ValidationExpression="/\S/"
ErrorMessage="Only use letters from the english alphabet a-z">
</asp:RegularExpressionValidator>
Use:
^[A-Za-z0-9 _]+[A-Za-z0-9][A-Za-z0-9 _]*$
The '+' says one or more, so empty fields will fail.
^[a-zA-Z0-9 _]+$
+ means at least one
if you mean at least one not white-space character something like
^[a-zA-Z0-9 _]*[a-zA-Z0-9_]+[a-zA-Z0-9 _]*$
I'm looking for a regular expression that which will match a string ##test## in a text. The string can be surround by any word or nonword character, or white-space, or newline - so everything can be one the left and on the right of the string, no matter.
I need to use it in a asp.net RegularExpressionValidator control for ValidationExpression.
Thanks in advance for help !
Regards.
<asp:RegularExpressionValidator ID="RegularExpressionValidator9" runat="server" ControlToValidate="TextBox1"
Display="Dynamic" ValidationGroup="Mail" ErrorMessage="Insert !"
ValidationExpression="(\w|\s|\n)##test##(\w|\s|\n)" >*</asp:RegularExpressionValidator>
<asp:Button ID="Button1" runat="server" Text="Button"
ValidationGroup="Mail" Onclick="Button1_Click" />
This should do it:
ValidationExpression="[\s\S]*##test##[\s\S]*"
I can see three problem with your regex, all having to do the (\w|\s|\n) portion:
It will match exactly one character. You need it to match zero or more characters; adding the * quantifier does that.
It's needlessly redundant and gratuitously inefficient. [\w\s] matches the same things: a word character (\w) or a whitespace character (\s, which already includes \n). And whenever you have a choice between using and alternation ((a|b|c)) or a character class ([abc]), the character class should always be the first tool you reach for. It may look like a trivial choice, but it can have a huge impact on performance.
It leaves out a lot of characters, most notably punctuation characters like !, +, ., etc..
If you're wondering why I used [\s\S]* and not .*, it's because the validation can be performed either in the browser or the server. In JavaScript regexes, as in most other flavors, the . metacharacter doesn't match newlines. Most of the others also support a "single-line" or "dot-matches-all" mode, but not JavaScript.
Of course, you could just force it to run on the server only, but you might as well get into habit of dumbing down your regexes to JavaScript's level when you can. :-/
Something like this?
.*(##test##).*