Regular expression for validating url speed dating venues christchurch
Enclosing the expression in the caret (^) and dollar sign ($)markers ensures that the expression consists of the desired content and nothing else.A ^ matches the position at the beginning of the input string and a $ matches the position at the end of the input string.Ignore Pattern Whitespace, which means that non-escaped white space is ignored.Regex regex = new Regex(@" ^ # anchor at the start (?This page may contain URLs that were valid when originally published, but now link to sites or pages that no longer exist.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.Technical support for the Microsoft products and technologies referenced in this guidance is provided by Microsoft Support Services. It is provided as a courtesy for individuals who are still using these technologies.
If you are not using server controls (which means you cannot use the validation controls) or if you need to validate input from sources other than form fields, such as query string parameters or cookies, you can use the Regex class within the System. The following example shows how to use a regular expression to validate a name input through a regular client-side HTML control.
To validate a server control's input using a Regular Expression Validator The regular expression used in the preceding code example constrains an input name field to alphabetic characters (lowercase and uppercase), space characters, the single quotation mark (or apostrophe) for names such as O'Dell, and the period or dot character.
In addition, the field length is constrained to 40 characters.
Regular expressions are much easier to understand if you use the following syntax and comment each component of the expression by using a number sign (#).
To enable comments, you must also specify Regex Options.