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 _]*$
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} *$"
In MaskedEditExtender:AutoComplete="true" AutoCompleteValue=""
In CodeBehind: txtTelefone.Text.Trim();
With this, all unfilled characters will be replaced as space in the end of the string, the regex will take care of the validation, and the Trim() will remove the spaces. Thus allowing you to make the Mask's length optional.
Set ClearMaskOnLostFocus="true" on MaskedEditExtender.
I want to allow only spaces, hyphens, underscores & commas along with alphabets & numbers. But this is not working as desired.
<asp:RegularExpressionValidator ControlToValidate="txtQuestion"
Display="dynamic" runat="server" ErrorMessage="*"
ValidationExpression="^[a-zA-Z0-9-_,\s]$"></asp:RegularExpressionValidator>
Character ShownResult
- valid
_ valid
, valid
-_ invalid //this should be valid for me
Put - symbol at the last or at the first inside the character class or consider escaping it otherwise it would act as a range operator.
^[a-zA-Z0-9_,\s-]+$
Add + after the character class to allow one or more characters otherwise it would allow only a single character from the list.
^[a-zA-Z0-9\-_,\s]*$
Escape - so that it does not define a range.Also use *or + to include one or more characters.
See demo.
http://regex101.com/r/hQ1rP0/21
If you want text field to except only Numbers and Char #%?* use following RE
ValidationExpression="[0-9#%?]"
This will work for any combination of characters
This my asp:RegularExpressionValidator
<asp:RegularExpressionValidator ID="RegularExpressionValidator2"
runat="server" ControlToValidate="uxTrachoCtrl1"
ErrorMessage="Ne dois pas contenir des caractères alphabétiques"
ValidationExpression="[0123456789,.<>=]" ValidationGroup="verification" Display="Dynamic"
SetFocusOnError="True">
</asp:RegularExpressionValidator>
The string can contain only those characters 0123456789,.<>=
This my regex [0123456789,.<,>,=]
It works if I type one character like f or 1, but if I put more than one character this will raise an error:
ex: input="1"=ok
input="f"=error
input="11"=error (It's supposed to be right)
The character class matches only one character. You need to repeat it if you want to allow arbitrary length characters:
"[0-9,.<>=]*"
If you want to exclude empty inputs use this instead:
"[0-9,.<>=]+"
Note that my character class is equivalent to yours (0-9 is a shorthand notation for 0123456789 and you had the , multiple times in your character class).
you just have defined the range of valid characters for one character
change it to
ValidationExpression="[0-9,.<>=]{minLength,maxlength}"
instead of minLength and maxLength you should put your desired numbers .
or use *|+ if you want to allow 0|1 or more repeat of characters as others suggested
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])$