Got a brain teaser...maybe not for GURUS :)
bbcompent1 | Posted 6:14am 28. October 2008 Server Time |
Ok, here is what I'm trying to do. I have a basic email form and what I'd like to do using standard regex is block email addresses like hotmail.com, gmail.com and so on from being entered. I've been trying a miriad of different things but nothing works properly. I'm using asp.net regular validation. What I have so far is this:
<asp:RegularExpressionValidator id="regExEmailAdd" runat="server" CssClass="ERROR_FORM_VALIDATION" ErrorMessage="Invalid email address" Display="Dynamic" ControlToValidate="User_Email_Address" ValidationExpression="\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*">Invalid email address</asp:RegularExpressionValidator>
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stimpy | Posted 4:25pm 29. October 2008 Server Time |
Why not just use a custom validator and then on the back end check to see if it has a hotmail or gmail suffix and if so throw the error?
stimpy | Posted 5:05pm 29. October 2008 Server Time |
So here's the custom validator:
<asp:CustomValidator id="CustomValidator1" runat="server"
ControlToValidate="Text1"
OnServerValidate="ServerValidate"
Display="Static">
Email address cannot end in '@hotmail.com' or '@gmail.com.' Please enter a valid email address.
</asp:CustomValidator>
and then here's the aspx.cs:
void btnEmailSubmit_Click(object sender, EventArgs e)
{
if(Page.IsValid)
{
// Do something
}
else
{
// Do something else
}
}
void ServerValidate (object source, ServerValidateEventArgs value)
{
// use the indexof function to look for your strings of '@gmail.com' and '@hotmail.com
// indexof returns a -1 if the string is not found
if((txtEmail.Text.IndexOf("@hotmail.com") = -1) || ((txtEmail.Text.IndexOf("@gmail.com")))
{
return false;
}
else
{
return true
}
THis may not be EXACTLY the way but it should put you on the right path. I haven't tested this code so no promises it runs out of the box....
}
stimpy | Posted 5:06pm 29. October 2008 Server Time |
Ooops got the return false and the return trues switched around...
bbcompent1 | Posted 12:31am 7. November 2008 Server Time |
Its ok, I figured it out. I put it up on one of the regex forums, maybe regexfinder.com?
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