Материал из .Net Framework эксперт
as BaseValidator
<%@ Page Language="vb" %>
<html>
<head>
<title>Validators collection example</title>
<script runat="server">
Sub Page_Load()
Dim Validator as BaseValidator
For Each Validator in Validators
Message.Text &= Validator.ID & " error message: "
Message.Text &= Validator.ErrorMessage & "<br/>"
Next
End Sub
</script>
</head>
<body>
<form runat="server">
Phone: <asp:textbox id="phone" runat="server"/>
<asp:requiredfieldvalidator
id="rfvPhone"
controltovalidate="phone"
display="dynamic"
errormessage="Required!"
runat="server"/>
<asp:regularexpressionvalidator
id="revPhone"
controltovalidate="phone"
display="dynamic"
validationexpression="^[2-9]\d{2}-\d{3}-\d{4}$"
errormessage="Enter a valid phone number in the form xxx-xxx-xxxx"
runat="server"/>
<br/>
<asp:button id="submit" text="Submit" runat="server"/>
</form>
<br/>
<asp:label id="Message" runat="server"/>
</body>
</html>
