Using validation controls to fill a form. : Form « HTML Controls « ASP.NET Tutorial
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<%@ Page Language="C#" AutoEventWireup="true"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Form filling (ASP.NET)</title>
</head>
<script type="text/javascript">
function CheckMembership(source, arguments)
{
arguments.IsValid = false;
var buf = arguments.Value;
if (buf == "Normal" || buf== "Silver" ||
buf == "Gold" || buf == "Platinum")
arguments.IsValid = true;
}
</script>
<body>
<div id="pageContent">
<form id="form1" runat="server">
<table>
<tr>
<td>Name</td><td>*</td>
<td><asp:textbox runat="server" id="fname" />
<asp:RequiredFieldValidator runat="server" id="fnameValidator"
ControlToValidate="fname"
Text="!!!"
ErrorMessage="Name is mandatory" /></td></tr>
<tr>
<td>Last Name</td><td>*</td>
<td><asp:textbox runat="server" id="lname" />
<asp:RequiredFieldValidator runat="server" id="lnameValidator"
ControlToValidate="lname"
Text="!!!"
ErrorMessage="Last name is mandatory" /></td></tr>
<tr>
<td>Age</td><td></td>
<td><asp:textbox runat="server" id="age" />
<asp:CompareValidator runat="server" id="ageValidator"
ControlToValidate="age"
Operator="GreaterThanEqual"
ValueToCompare="18"
Type="integer"
ErrorMessage="Age must be at least 18." /></td></tr>
<tr>
<td>Hire Date</td><td></td>
<td><asp:textbox runat="server" id="hired" />
<asp:CompareValidator runat="server" id="hiredValidator"
ControlToValidate="hired"
Display="Static"
Operator="DataTypeCheck"
Type="date"
ErrorMessage="Must enter a date." />
<asp:RangeValidator runat="server" id="hiredDateValidator"
ControlToValidate="hired"
Display="Dynamic"
MinimumValue="1999-1-1"
MaximumValue="9999-12-31"
Type="Date"
ErrorMessage="Date after 1-1-99." /></td></tr>
<tr>
<td>Membership Level</td><td></td>
<td><asp:textbox runat="server" id="membership" />
<asp:CustomValidator runat="server" id="membershipValidator"
ControlToValidate="membership"
ClientValidationFunction="CheckMembership"
ErrorMessage="Must be Gold or Platinum." /></td></tr>
</table>
<asp:linkbutton ID="Linkbutton1" runat="server" Text="Add..." />
<hr>
<asp:ValidationSummary ID="ValidationSummary1" runat="server"
ShowMessageBox="true"
ShowSummary="true"
HeaderText="The following errors occurred:"
DisplayMode="BulletList" />
</form>
</div>
</body>
</html>