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regularexpressionvalidator

代码：

<script  runat="server">


sub submit(sender As Object, e As EventArgs)


if Page.IsValid then


   lbl.Text="The page is valid!"


else


   lbl.Text="The page is not valid!"


end if


end sub


</script>


 


<!DOCTYPE html>


<html>


<body>


 


<form runat="server">


Enter a US zip code:


<asp:TextBox id="txtbox1" runat="server" />


<br><br>


<asp:Button text="Submit" OnClick="submit" runat="server" />


<br><br>


<asp:Label id="lbl" runat="server" />


<br>


<asp:RegularExpressionValidator


ControlToValidate="txtbox1"


ValidationExpression="\d{5}"


EnableClientScript="false"


ErrorMessage="The zip code must be 5 numeric digits!"


runat="server" />


</form>


 


</body>


</html>

结果：

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