regularexpressionvalidator is mostly use for validate email address, social security number, telephone number, postal (zip) code etc.
you also need to add a requiredfieldvalidator control because regularexpressionvalidator cannot validate empty value control.
Regular Expression Validator control determine whether an input control's entered value matches a pattern defined by a regular expression.
We will also look at how to customize the login control's appearance and behavior. For web sites that use forms authentication, a user logs on to the website by visiting a login page and entering their credentials.
Or, if you have not yet created an account, go ahead and create one from the .
That means any hacker sniffing the network traffic can see the username and password.
visual studio and visual web developer IDE can auto generate regularexpressionvalidator validation expression.
it is a very useful and time saving feature of visual studio.