Validation By Function ASP.Net

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<%@ Page Language=VB Debug=true %>


Validating an Email Address with a RegularExpressionValidator Control





Please enter an email address:

    id="txtEmail" 
    runat=server 
/>
    id="regEmail"
    controltovalidate="txtEmail"
    validationexpression="\w+\w*\@\w+\w+\w*\.(com|edu|org|gov)"
    display="Dynamic"
    font-name="Arial" 
    font-size="11"
    runat=server
>
    You must enter an email address in the form of me@na.com.




    id="butOK"
    text="OK"
    type="Submit"
    runat="server"
/>