Required field validator (VB.net)
<%@ Page Language="vb" %>
<html>
<head>
<title>Validation Control Example</title>
<script language="javascript">
<!--
function ClientValidate(source, arguments)
{
//alert(arguments.Value);
var r, re; //Declare variables.
re = new RegExp(/^[1-9][0-9][0-9][0-9]$/); //Create regular expression object.
r = re.test(arguments.Value); //Test for match.
arguments.IsValid = r; //Return results.
}
-->
</script>
<script runat="server">
Sub Page_Load()
vsSummary.DisplayMode = ValidationSummaryDisplayMode.List
End Sub
Sub ServerValidation (source As object, args As ServerValidateEventArgs)
Dim RegExVal As New System.Text.RegularExpressions.Regex("^\d{4}$")
If RegExVal.IsMatch(args.Value) Then
args.IsValid = True
Else
args.IsValid = False
End If
End Sub
</script>
</head>
<body>
<h1>Validation Control Example</h1>
<form runat="server">
<asp:table id="MyTable" border="1" cellpadding="5" cellspacing="0" runat="server">
<asp:tablerow runat="server">
<asp:tablecell runat="server">
RegularExpressionValidator Control:
<br><br>
Enter a valid 5 or 9-digit zip code
</asp:tablecell>
<asp:tablecell runat="server">
<asp:textbox id="zipcode" runat="server"/><br>
<asp:regularexpressionvalidator id="reZipCode"
controltovalidate="zipcode"
validationexpression="^\d{5}$|^\d{5}-\d{4}$"
errormessage="Not a valid Zip code!"
display="static"
runat="server"/>
</asp:tablecell>
</asp:tablerow>
<asp:tablerow runat="server">
<asp:tablecell runat="server">
RequiredFieldValidator Control:
<br><br>
Enter a login name
</asp:tablecell>
<asp:tablecell runat="server">
<asp:textbox id="login" runat="server"/><br>
<asp:requiredfieldvalidator id="rfvLogin"
controltovalidate="login"
display="static"
errormessage="Login cannot be blank!"
runat="server"/>
</asp:tablecell>
</asp:tablerow>
<asp:tablerow runat="server">
<asp:tablecell runat="server">
ValidationSummary Control:
</asp:tablecell>
<asp:tablecell runat="server">
<asp:validationsummary id="vsSummary"
displaymode="bulletlist"
headertext="Page has the following errors: "
showsummary="true"
showmessagebox="false"
runat="server"/>
</asp:tablecell>
</asp:tablerow>
<asp:tablerow runat="server">
<asp:tablecell colspan="2" runat="server">
<asp:button text="submit" runat="server"/>
</asp:tablecell>
</asp:tablerow>
</asp:table>
<asp:label id="MyLabel" runat="server"/>
</form>
</body>
</html>