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NET applications through the Regular Expression Validator control and the Regex class in the System. You can use regular expressions to restrict the range of valid characters, to strip unwanted characters, and to perform length and format checks.
You can constrain the input format by defining patterns that the input must match.
I am using Regular expression validator for validating URL (of validators) Here is the expression: http(s)? Also, next time, you might want to include the programming language or context, because regex processors vary greatly in feature support. :[-a-z0-9] \.)*[-a-z0-9] .*)/i What this matches: Anything that starts with https://, or They prevent those specific groups of characters from being assigned a number.
It works well for fully qualified URL, but doesnt work if we use URL without http or https That is it validates: but not validates com what i need is that in addition to current behaviour, it validates the url not having http specifying, that is it should validate com too Thanks Friends Manish Sadhwani if your regex processor has trouble. It's not terribly strict, but it matches all standard domain names (but might let slip through some invalid ones).
To validate other forms of input, such as query strings, cookies, and HTML control input, you can use the System. The attacker can then supply carefully crafted input that compromises your application by attempting SQL injection, cross-site scripting, and other injection attacks.
To avoid such vulnerability, you should validate text fields (such as names, addresses, tax identification numbers, and so on) and use regular expressions to do the following: Regular expression support is available to ASP. If you capture input by using server controls, you can use the Regular Expression Validator control to validate that input.
This How To shows how you can use regular expressions within ASP. Regular expressions are a good way to validate text fields such as names, addresses, phone numbers, and other user information.or, see this url should work for most regex processors:/((? Followed by at least one or more valid domain characters (a-z, 0-9, or -)Matches without case sensitivity (/i)It does not enforce white space, so it will match this: blah and return you want to enforce space, add \s to the beginning, but then you have to ensure that you add a space to the beginning of the string to match. They can be replaced with matching groups () if your regex processor has trouble. It's not terribly strict, but it matches all standard domain names (but might let slip through some invalid ones). Also, next time, you might want to include the programming language or context, because regex processors vary greatly in feature support. I developed this by little trial and error and covers u r scenario.... Regards, Abhishek when we are u using that time it working fine but that is not only web site ulr format for example ( .com, , , in ) like this lot of format is there .please post answer like all url validation supported ..
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