email pattern validation

Common email address IP address English user name validation function */function to check e-mail address like stringfunction Isemail (s){There must is >= 1 character before @, so weStart looking at character position 1(i.e. second character)var i = 1;var slength = s.length; if (slength Look for @while ((I {i++} if ((i >= slength) | | (S.charat (i)!= "@")) return false;else i = 2; Look for.while

Change the Display field name Design field specification1. References1 using System.ComponentModel; 2 using System.ComponentModel.DataAnnotations;2.DisplayName value Public classBook { Public intBookID {Get;Set; } [DisplayName ("ISBN")] Public stringISBN {Get;Set; } [DisplayName ("Book name:")] [Required (ErrorMessage="name of the book must be filled")] Public stringBookName {Get;Set; } [DisplayName ("author")] [Required (ErrorMessage="The author must fill in")] Public s