If none of the other validators can help you, the Custom Validator usually can.It doesn't come with a predefined way of working; you write the code for validating your self.
Since this tutorial hasn't treated database access yet, we will do a simpler example, but hopefully you will see that you can do just about everything with the Custom Validator.The control allows you to validate both clientside and serverside, where the serverside approach is probably the most powerful. Value, which is the string of the control being validated, for it's length.Of course, doing serverside validation requires a postback to validate, but in most cases, that's not really a problem. If it's exactly 8 characters long, we return true, otherwise we return false.In this example, we will simply check the length of the string in the Text Box. This is a very basic and that useful example, only made to show you how you may use the Custom Validator.
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. Net Validator controls like Required Field Validator, Regular Expression Validator, Compare Validator, Range Validator and Custom Validator inside the ASP.
Here Mudassar Ahmed Khan has explained the following three types of character length or count validations for ASP.
Net Validation Summary control inside j Query Modal Dialog popup box without adding any client click event and for multiple buttons by overriding the ASP. Here Mudassar Ahmed Khan has explained how we can display the validation failed error messages of ASP. Now you can ask questions directly to me on my new site ASPForums.
Minimum and Maximum character length Validation Here Mudassar Ahmed Khan has explained how to display the ASP. Net Question Answer site, specially started to allow visitors of this site ask their doubts and queries. Just click the Ask Now button and ask your question now.
NET's Membership system and its associated Web controls enable developers to create websites that support user accounts in a fraction of the time that it once did.
In a nutshell, the Membership system and the specified provider handle the low-level details of creating a user account, validating a user's credentials, deleting an account, locking out an account, getting information about the currently logged on user, and so on.