How To Validate The Length Of A Textarea Using A Regular Expression Validator
May 19, 2010
I'm looking to validate the length of a textarea using a regular expression validator. It should allow all characters and crlfs. I'm also concerned about crlfs counting as 1 or 2 characters, I'm concerned it may be different across browsers but I'm hoping ASP.NET regulates it. Also, I'm saving to a mix of varchar and nvarchar fields in MSSQL, do I need to be concerned about the way crlfs are saved there? I'm in a hurry to do this right, so I'll be researching all this on my own but I'm just hoping someone out there might have experience handling such concerns.
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Similar Messages:
Jun 30, 2010
I would like to validate the textbox for specific text and it must not be blank. But the regular expression validator is not validating if the text box is BLANK. However, it validates if I type something in the text box.
How can I make regular expression to trigger even if the text box is empty?
Should I use Required Validator + Regex Validator at the same time?
<asp:TextBox ID="txtcard" runat="server" MaxLength="16"></asp:TextBox>
<asp:RegularExpressionValidator ID="RegularExpressionValidator2" runat="server"
ControlToValidate="txtcard" ErrorMessage="Please type credit card no"
ValidationExpression="^d{16}$"></asp:RegularExpressionValidator>
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Dec 31, 2010
I using RangeValidator (0-10)gularExpressionValidator for text box ,Iam using regx for validate numeric characters
But if i enter charcters it will fire both RangeValidator and regx validator eventhoug i am enterd character,
i want to fire both validators seperatly
Here is my code
[code]...
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Feb 16, 2010
I'm trying to use the validator to work on a email form to ensure that they enter a valid from email address. That part works. I also want to add to the expression the text that I pre-populate in the txtbox ("Enter your email address") so on postback, after sending the message, I can clear the fields and repopulate that box.
How do I add that wording to the current expression: w+([-+.']w+)*@w+([-.]w+)*.w+([-.]w+)*
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Feb 2, 2011
I am using Regular Expression validator for a text box. The below is working fine.It is not performing validation when I enter values like 0000..001.How can I modify validation expression? But it would allow values like 100,...5000 i.e zeros after a number.
<asp:RegularExpressionValidator ID="reg2" runat="server" ControlToValidate="rng2"
ValidationExpression="^[0-9]+" ErrorMessage="*Please Enter a Valid Number for Second Range."
ForeColor="Red" Font-Bold="True"></asp:RegularExpressionValidator>
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May 1, 2010
i have a textbox in my web form and i want to input any word with any character. so, only i want to check length of textbox less than 200 character. how can i do it with regular expression? and if i want to block some character how can i do it?
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Jun 18, 2010
Im trying to make some BBCode-translation from textarea, but im stuck on translate list to html. I have this fo Bold text:
[Code]....
But how can i do if i want to translate this:
[Code]....
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Feb 23, 2010
I believe it is a simple question. :)
In my ASP.NET Web Form I have a multiline TextBox which should be validated with RegularExpression Validator. Text box should contain one ore more strings "a" (just 'a' char, nothing else).
So far I got these regular expressions for my RegularExpressionValidator object:
(?m:(^a$)+)
(?m:A(^a$)+)
(?m:^a$)
Neither works. :) Guess there is something fundamental I'm not getting yet.
[Code]....
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Sep 28, 2010
I'm having a hard time trying to create a right regular expression for the RegularExpressionValidator control that allows password to be checked for the following:- Is greater than seven characters.- Contains at least one digit.- Contains at least one special (non-alphanumeric) character.Cant seem to find any results out there too.
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Sep 21, 2010
I need to construct a regular expression for the password textbox, Min:8,Max:16 and must include atleast a number(0-9),alphabets upper and lower case. I am unable to limit the length to 16.
<asp:RegularExpressionValidator ID="RegEx" runat="server" ControlToValidate="Password"
ErrorMessage="Password must be min:8,max:16 characters and include a number,alphabets upper case and lower case.
"ToolTip="Password format is not correct"
ValidationExpression="^(?=.{8})(?=.*d)(?=.*[a-z])(?=.*[A-Z]).*$">
</asp:RegularExpressionValidator>
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Feb 16, 2010
here is waht i am trying to achieve.
first character is in caps and the rest of the name is in small for Firstname Space
first character is in caps and the rest of the name is in small for lastname
ex: Ajay Kumar Bakshi
expression: ^[A-Z]{1}[a-z]*[s]{1}[A-Z]{1}[a-z]*$
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Jul 13, 2010
How can I use a Regular Expression Validator to ensure that only a number like 3.00 is entered into a text box?
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Jul 2, 2010
what is the regular expression validator for letters only?. I have tried this"[a-zA-Z]" and "[a-z][A-Z]" with no luck..
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Jan 5, 2011
I have a page with required field and regular expression validators. I noticed recently that some of the regular expression validators (the regex validators on the Date fields) are not firing. What should I be looking at to troubleshoot this?
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Jan 6, 2010
When I added Regular Expression validator on FileUpload Control, Page.IsValid returns false & Data is not Saved. I had used Regular Expression Validator like this:
asp:RegularExpressionValidator
ID="REVFileType"
runat="server"
ErrorMessage="*Invalid File(.bmp)"
ControlToValidate="FileUpload1"
Font-Bold="True"
SetFocusOnError="True"
ValidationExpression="^(([a-zA-Z]:)|(\{2}w+)$?)(\(w[w].*))(.jpg|.JPG|.gif)$"></asp:RegularExpressionValidator>.
I had used it to check if uploaded file is of extension .jpg|.JPG|.gif
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Aug 30, 2010
How would I create a regular expression validator for a textbox, to limit the input to a decimal number between .1 and 1?
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Feb 5, 2010
I have a fileupload on my page which only accepts PDF Files and to do this i have a Regular Expression Validator to check the extension of the files. step 1 load pagestep 2 browse and select a txt file using fileupload then validator error is displayedstep 3 browse and select a pdf file using fileupload then no validator error.step 4 Upload the file using a Button and on post back i can see the validator error is displayed again.how can i remove the validator error on postback without hidding the control.?
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May 7, 2015
Earlier my text box was running on this Validation Expression="^[a-zA-Z'.s-]{1,80}$", to allow only alphabets,Ā Ā ' . s . Now my text box should be capable of taking Chinese characters as well, so I wasĀ learntĀ onlineĀ to use this p{L} for unicodeĀ instead of Ā a-zA-Z, and set EnableClientScript="false".
asp:RegularExpressionValidator ID="regexpName" runat="server" CssClass="failureNotification" ErrorMessage="No Special Characters allowed"
ControlToValidate="txtName" ValidationExpression="^[p{L}'.s-]{1,80}$" Display="Dynamic" meta:resourcekey="regexpNameResource1" EnableClientScript="false"
I have done both, but it doesn't work. My input values were like
1. John123 2. ę±čÆ%^&
Both of these were accepted without any errors. But I expect only alphabets in english and chinese and ' . s - to be accepted as Name input.
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May 4, 2010
give me Regular expression for validation string that must have at least one alphabet and at least one numeric value?
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Sep 8, 2010
i'm stuck with password validation in c#.
I'm using regular expression to validate the string.
Password criteria is alphanumeric.
The password must have atleast one number(0-9), atleast one character(a-z or A-Z)
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Jan 6, 2010
i need a regular expression for validate authors of bookssomething like:
John, D.
John, D.O.
John, D.O.E.
i mean First Char UPPER ended with, the 1 or many initials UPPER separated with.
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Jul 1, 2010
I want to validate a textbox with regular expression so you only can enter numeric characters, but now I want that the error validation appear if the textbox be empty. here is the code
Types.Add("NUMBER",
new
Validation(@"[d]{1,255}","Only
numbers can be entered in this field."));
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Oct 19, 2010
i want to validate my textbox where following things are not allowed
1) phone no
2) email
3) internet url
i want to use regular expression
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Jan 12, 2011
I have this email, which I know is valid:
MyName@MyDomain.info
I am validating an input field with the default asp net email validator expression and it returns the email address as INVALID.
Here is my code:
<asp:RegularExpressionValidator
ID="RegularExpressionValidator1"
runat="server"
ValidationExpression="w+([-+.']w+)*@w+([-.]w+)*.w+([-.]w+)*"
ControlToValidate="Email"
runat="server"
ErrorMessage=" * "
/>
Is there a better regular expression pattern to validate an email address?
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Jun 16, 2010
I want That validate the textbox so this no be empty I put that
"[ws]{1,50}"
But I want that the error mark when the textbox be empty.
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