RegEx Validation Control Bug??

[Mike]

I'm trying to have a form where a user has to enter a valid email address, and
I'm trying to use the RegEx Validation control to do that. The problem is that
when a user submits the form with a blank line, it is ACCEPTED even though it
does not pass the pattern match in the expression.

Another problem is that if there are leading spaces or trailing in a valid email
address, the expression fails.

Case 1:(blank) : PASSES (it shouldn't)
Case 2: jo*@sixpack.com : FAILS (leading spaces)
Case 3:jo*@sixpack.c om : FAILS (trailing spaces)
<form id="Form1" method="post" runat="server">
Enter your Email address:
<asp:TextBox id="txtEmail" runat="server"> </asp:TextBox>
<asp:RegularExp ressionValidato r id="valRegExEma il" runat="server"
ErrorMessage="E nter a valid email address"
ValidationExpre ssion="\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"
ControlToValida te="txtEmail">* </asp:RegularExpr essionValidator >
<br>
<asp:Button id="Button1" runat="server" Text="Button"></asp:Button>
<br>
<asp:Validation Summary id="ValidationS ummary1"
runat="server"> </asp:ValidationS ummary>
</form>

[NoOne]

I think in the documentation it says all validators accept empty string as
valid except the required validator.

"Mike" <do************ @boo.ya> wrote in message
news:80******** ***********@drn .newsguy.com...

I'm trying to have a form where a user has to enter a valid email address, and I'm trying to use the RegEx Validation control to do that. The problem is that when a user submits the form with a blank line, it is ACCEPTED even though it does not pass the pattern match in the expression.

Another problem is that if there are leading spaces or trailing in a valid email address, the expression fails.

Case 1:(blank) : PASSES (it shouldn't)
Case 2: jo*@sixpack.com : FAILS (leading spaces)
Case 3:jo*@sixpack.c om : FAILS (trailing spaces)
<form id="Form1" method="post" runat="server">
Enter your Email address:
<asp:TextBox id="txtEmail" runat="server"> </asp:TextBox>
<asp:RegularExp ressionValidato r id="valRegExEma il" runat="server"
ErrorMessage="E nter a valid email address"
ValidationExpre ssion="\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"
ControlToValida te="txtEmail">* </asp:RegularExpr essionValidator >
<br>
<asp:Button id="Button1" runat="server" Text="Button"></asp:Button>
<br>
<asp:Validation Summary id="ValidationS ummary1"
runat="server"> </asp:ValidationS ummary>
</form>

[Munsifali Rashid]

You need to use a required field validator in conjunction with a regular
expression validator. I'm guessing Microsoft have done it this way for
scenarios where fields only need to be validated if data is entered, though
it would have been nice if they could have added an option into the other
validators where you can force a field to be required.

As for the spaces problem... You could modify the regular expression to
allow leading or trailing spaces, and then trim the whitespace from the
string on the server side. Another way to do it, would be to write a
javascript function to trim the spaces client side, and update the textbox.

I.e.

<script language="javas cript">
<!--
function trimWhitespace( e)
{
e.value = e.value.trim();
}
</script>

Add this to the textbox, in the codebehind file:

txtEmail.Attrib utes.Add("onCha nge", "trimWhitespace (this)")
Hope this helps,

Mun

"Mike" <do************ @boo.ya> wrote in message
news:80******** ***********@drn .newsguy.com...

I'm trying to have a form where a user has to enter a valid email address, and I'm trying to use the RegEx Validation control to do that. The problem is that when a user submits the form with a blank line, it is ACCEPTED even though it does not pass the pattern match in the expression.

Another problem is that if there are leading spaces or trailing in a valid email address, the expression fails.

Case 1:(blank) : PASSES (it shouldn't)
Case 2: jo*@sixpack.com : FAILS (leading spaces)
Case 3:jo*@sixpack.c om : FAILS (trailing spaces)
<form id="Form1" method="post" runat="server">
Enter your Email address:
<asp:TextBox id="txtEmail" runat="server"> </asp:TextBox>
<asp:RegularExp ressionValidato r id="valRegExEma il" runat="server"
ErrorMessage="E nter a valid email address"
ValidationExpre ssion="\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"
ControlToValida te="txtEmail">* </asp:RegularExpr essionValidator >
<br>
<asp:Button id="Button1" runat="server" Text="Button"></asp:Button>
<br>
<asp:Validation Summary id="ValidationS ummary1"
runat="server"> </asp:ValidationS ummary>
</form>

[altergothen]

You need to run a Required Field validation control first, then the regular
expression like this:

<form id="Form1" method="post" runat="server">
Enter your Email address:
<asp:TextBox id="email" runat="server" />
<asp:RequiredFi eldValidator
id="RequiredEma il"
runat="server"
ControlToValida te="email"
ErrorMessage="< br>* Email address is required"
Display="Dynami c"
/>
<asp:RegularExp ressionValidato r
id="RegExpEmail "
runat="server"
ControlToValida te="email"

ValidationExpre ssion="^[a-zA-Z][\w\.-]*[a-zA-Z0-9]@[a-zA-Z][\w\.-]*[a-zA-Z0-
9]\.[a-zA-Z][a-zA-Z\.]*[a-zA-Z]$"
ErrorMessage="< br>* Email is not in a valid format"
Display="Dynami c"
/>
<br>
<asp:Button id="Button1" runat="server" Text="Button"></asp:Button>
<br>
</form>

"Mike" <do************ @boo.ya> wrote in message
news:80******** ***********@drn .newsguy.com...

I'm trying to have a form where a user has to enter a valid email address, and I'm trying to use the RegEx Validation control to do that. The problem is that when a user submits the form with a blank line, it is ACCEPTED even though it does not pass the pattern match in the expression.

Another problem is that if there are leading spaces or trailing in a valid email address, the expression fails.

Case 1:(blank) : PASSES (it shouldn't)
Case 2: jo*@sixpack.com : FAILS (leading spaces)
Case 3:jo*@sixpack.c om : FAILS (trailing spaces)
<form id="Form1" method="post" runat="server">
Enter your Email address:
<asp:TextBox id="txtEmail" runat="server"> </asp:TextBox>
<asp:RegularExp ressionValidato r id="valRegExEma il" runat="server"
ErrorMessage="E nter a valid email address"
ValidationExpre ssion="\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"
ControlToValida te="txtEmail">* </asp:RegularExpr essionValidator >
<br>
<asp:Button id="Button1" runat="server" Text="Button"></asp:Button>
<br>
<asp:Validation Summary id="ValidationS ummary1"
runat="server"> </asp:ValidationS ummary>
</form>