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}$">
</asp:RegularExpressionValidator>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
This is an another way to allow numeric only with minimum 7 and maximum 20 characters
Use this
ValidationExpression="^[0-9]{7,20}$"
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} *$"
In MaskedEditExtender:AutoComplete="true" AutoCompleteValue=""
In CodeBehind: txtTelefone.Text.Trim();
With this, all unfilled characters will be replaced as space in the end of the string, the regex will take care of the validation, and the Trim() will remove the spaces. Thus allowing you to make the Mask's length optional.
Set ClearMaskOnLostFocus="true" on MaskedEditExtender.
In asp.net, I want to use regularexpressionvalidator for phone number. requirement is only to allow numbers and Dash (-)
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ControlToValidate="txtPhone" ErrorMessage="Not a Valid Phone Number" ValidationExpression="\d*">
The above code only validates numbers but not Dash -. Like user randomly put
23333-34 (should accept) or any combination. It is not must that - will be there. It can be numbers only some times.
You could use this as the ValidationExpression:
[0-9-]*
to accept any number of digits and dashes (including "---").
You could also use this:
([0-9]\-?)*
to accept digits, optionally with single dashes inbetween (or after). Use {5,10} instead of * to accept a minimum of 5 and a maximum of 10 digits (adjust the numbers to your needs).
For more regex info, see MSDN.
<asp:TextBox ID="txtPhone" runat="server"></asp:TextBox>
<asp:RegularExpressionValidator ID="reg" runat="server" ValidationGroup="VGrp"
SetFocusOnError="true" ErrorMessage="Phone is invalid"
ControlToValidate="txtPhone" ValidationExpression="\d*"></asp:RegularExpressionValidator>
try this.
I'm uaing following regular expression for validating decimal or numeric (18,3) numbers,
it does disallow users from entering more than 1 decimal points and all that
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ErrorMessage="Invalid" ControlToValidate="txtqty" ValidationExpression="^[-+]?[0-9]*\.?[0-9]*([?[0-9]+)?$" ValidationGroup="save"></asp:RegularExpressionValidator>
but i also want to disallow users from entering any value equal to 0 like the following eg:
0.00,
0000.00,
00.0,
0...
I think the problem is that you are using one validator to perform more than one task
Divide your problem:
Validate the format
Validate specific values
Use a simple CompareValidator in addition to your RegularExpressionValidator
<asp:CompareValidator ErrorMessage="Value must be grater than 0" ControlToValidate="TextBox1"
runat="server" Operator="NotEqual" Type="Double" ValueToCompare="0" />
"Use following regular expression:
^\d[1-9]*(\.\d+)|([0-9])$
it disallow values in following pattern:
00.00,0123.78 i.e value before decimal followed by 0
You can used this
^([1-9][0-9]*\.[0-9]+)|([0-9]+)$
<asp:RangeValidator ID="RangeValidator1" runat="server" ErrorMessage="Invalid" ControlToValidate="txtqty" MaximumValue="99999" MinimumValue="1.0000" ValidationGroup="save"></asp:RangeValidator>
range validator works
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])$