I have done a validations using MVC4 Data Annotations.
And i restricted the Special characters too.
But i want to allow Spaces between each words.
I tried this:
[Required(ErrorMessage = "Category Name should not be empty")]
[RegularExpression(#"^[a-zA-Z0-9]+$", ErrorMessage = "Special character should not be entered")]
public virtual string Name { get; set; }
Right now system is not allowing me to Insert. Because i have entered a space. Its considering the space as special char.
How do i allow space? the same time the above validation should work.
Myself found the answer.
Instead of #"^[a-zA-Z0-9]+$" we need to add like this #"^[a-zA-Z0-9'' ']+$".
''Single Space' in the Expression
'' '
For more information I'd suggesting reading - Using Data Annotations to Customize Data Classes (MSDN)
I just came across your answer and just wanted to mention that the single quotes are not needed. You just need the space inside the brackets.
#"^[a-zA-Z0-9 ]+$"
we need to add like this
Change symbol "+" to "*" (after close square brackets)
Correct answer is :
#"^[a-zA-Z0-9]*$"
Related
Can anyone tell me how to remove unwanted characters from username field.
ex: i:0#.w|abcventures\sreekiran.k I need to remove the characters which are generated before abcventures\sreekiran.k.
I have used translate() to eliminate those characters, but, it is removing i & w characters also, from the username.
To expand on the current answers, I think they meant to use substring-after(). This will do the trick:
substring-after(userName(), "i:0#.w|")
To expand on Mekalikot's answer -
substring-before(userName(), "i:0#.w|")
Will return just the string after the "i:0#.w|" from the user name function. If the user name function does not include that string, however, the formula will return nothing. Since you'll get a different value from the user name function in preview vs. the browser, you'll probably need to test this with the published form.
Use substring-before to remove those characters.
What is the default regular expression used by asp.net create user wizard?
According to the MSDN documentation, it should be something like this:
Regular Expression: #\"(?:.{7,})(?=(.*\d){1,})(?=(.*\W){1,})
Validation Message: Your password must be 7 characters long, and contain at least one number and one special character.
However, it does not work as it does not accept something like 3edc£edc, which is actually accepted when using the default create user wizard.
Any idea about how can I get this regular expression?
The error is in the ?: in (?:.{7,})(?=(.*\d){1,})(?=(.*\W){1,}) that is "consuming" the fist seven characters or more characters. It should be ?= OR you can invert the order: (?=(.*\d){1,})(?=(.*\W){1,})(?:.{7,})
Just change the order
^(?=(.*\d))(?=(.*\W)).{7,}
I additionally removed the {1,} and anchored it to the start of the string and you don't need a group around the last part
See it here on Regexr
Looks like a simple task - get a regex that tests a string for particular length:
^.{1,500}$
But if a string has "\r\n" than the above match always fails!
How should the correct regex look like to accept new line characters as part of the string?
I have a <asp:TextBox TextMode="Multiline"> and use a RegularExpressionValidator to check the length of what user types in.
Thank you,
Andrey
You could use the RegexOptions.Singleline option when validating input. This treats the input as a single line statement, and parses it as such.
Otherwise you could give the following expression a try:
^(.|\s){1,500}$
This should work in multiline inputs.
Can you strip the line breaks before checking the length of the string? That'd be easy to do when validating server-side. (In .net you could use a custom validator for that)
From a UX perspective, though, I'd implement a client-side 'character counter' as well. There's plenty to be found. jQuery has a few options. Then you can implement the custom validator to only run server-side, and then use the character counter as your client-side validation. Much nicer for the user to see how many characters they have left WHILE they are typing.
The inability to set the RegexOptions is screwing you up here. Since this is in a RegularExpressionValidator, you could try setting the options in the regular expression itself.
I think this should work:
(?s)^.{1,500}$
The (?s) part turns on the Singleline option which will allow the dot to match every character including line feeds. For what it's worth, the article here also lists the other RegexOptions and the notation needed to set them as an inline statement.
I'm using an asp.net Web Forms RegularExpressionValidator Control to validate a text field to ensure it contains a series of email addresses separated by semicolons.
What is the proper regex for this task?
I think this one will work:
^([A-Za-z0-9._%+-]+#[A-Za-z0-9.-]+\.[A-Za-z]{2,4}(;|$))+
Breakdown:
[A-Za-z0-9._%+-]+#[A-Za-z0-9.-]+\.[A-Za-z]{2,4} : valid email (from http://www.regular-expressions.info/)
(;|$) : either semicolon or end of string
(...)+ : repeat all one or more times
Make sure you are using case-insensitive matching. Also, this pattern does not allow whitespace between emails or at the start or end of the string.
The 'proper' (aka RFC2822) regex is too complicated. Try something like (\S+#[a-zA-Z0-9-.]+(\s*;\s*|\s*\Z))+
Not perfect but should be there 90% (haven't tried it, so it might need some alteration)
Note: Not too sure about \Z it might be a Perl only thing. Try $ as well if it doesn't work.
I'm looking to do do two things, and I am looking to do them in a beautiful way. I am working on a project that allows users to upload flickr photos by simply entering their flickr image URL. Ex: http://www.flickr.com/photos/xdjio/226228060/
I need to:
make sure it is a URL that matches the following format: http://www.flickr.com/photos/[0]/[1]/
extract the following part: http://www.flickr.com/photos/xdjio/[0]/
Now I could very easily write some string methods to do the above but I think it would be messy and love learning how to do these things in regex. Although not being a regex ninja I am currently unable to do the above.
Given an input string with a URL like the one you provided, this will extract the image ID for any arbitrary user:
string input = "http://www.flickr.com/photos/xdjio/226228060/";
Match match = Regex.Match(input, "photos/[^/]+/(?<img>[0-9]+)", RegexOptions.IgnoreCase | RegexOptions.SingleLine);
if(match.Success)
{
string imageID = match.Groups["img"].Value;
}
Breaking it down, we are searching for "photos/" followed by one or more characters that is not a '/', followed by a /, followed by one or more characters that are numbers. We also put the numbers segment into a named group called "img".
thought i would add to this that when using the javascript asp.net validator it doesn't support the grouping name.
the regex to use in this situation would be:
photos/[^/]+/([0-9]+)
thought someone might find this useful