To match a date in the format 'yyyy-MM-dd hh:mm' (Or indeed in whatever order you please) ^(((0[1-9]|\d|3)\/(0|1)\/((19|[2-9]\d)\d))|((0[1-9]|\d|30)\/(0|1)\/((19|[2-9]\d)\d))|((0[1-9]|1\d|2[0-8])\/02\/((19|[2-9]\d)\d))|(29\/02\/((1[6-9]|[2-9]\d)(0||)|((16||)00))))$ I suspect that the following is as accurate as can be expected without knowing when the user's locale switched over from the Julian to the Gregorian calendars.
Unfortunately, all it does is match valid numbers in a date time input, and 31st Feb will be marked as valid, but as so many have said, regex really isn't the best tool to do this test.
This is the simplest way to validate a dd/MM/yyyy date format string.
And it does work brilliantly except the fact that it cannot validate for months which have less than 31 days for example 30/02/2014 will be considered as a valid date. Net Regular Expression Validator samples to validate Minimum and Maximum text Length and also different configurations like Alphanumeric with special characters, Alphanumeric, Alpha and Numeric configurations.
Here Mudassar Ahmed Khan has explained how to validate Check Boxes inside Grid View and perform at least one checked validation using Java Script in ASP. Validation of Check Boxes inside Grid View is performed using ASP.
Here are some simple steps to make the process more secure.When capturing information for insertion into a database, or use in other processing, it's important to control what the user can enter.Otherwise you can end up with values in the database that have no relation to reality.I think it might help if you set an accurate expectation, as this regex does NOT, in fact, correctly validate leap years; e.g., there is no Feb. 29th in 2013, but this regex asserts that such is valid: regexr.com? Instead of as this lets the browser (and the user) know that the contents of that field need to be secured.