Mega Code Archive
Validating Drop-Down Lists with the RequiredFieldValidator Control
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<%@ Page Language="VB" %>
<script runat="server">
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs)
Label1.Text = "Page is valid!"
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>RequiredFieldValidator</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:DropDownList id="DropDownList1" runat="server">
<asp:ListItem Selected="True">Select a profession</asp:ListItem>
<asp:ListItem>Programmer</asp:ListItem>
<asp:ListItem>Lawyer</asp:ListItem>
<asp:ListItem>Doctor</asp:ListItem>
<asp:ListItem>Artist</asp:ListItem>
</asp:DropDownList>
<asp:RequiredFieldValidator id="RequiredFieldValidator1"
runat="server"
ErrorMessage="Please make a selection"
ControlToValidate="DropDownList1"
InitialValue="Select a profession">
</asp:RequiredFieldValidator>
<br />
<asp:Button ID="Button1" Runat="server" Text="Submit"
OnClick="Button1_Click" />
<br />
<asp:Label ID="Label1" Runat="server"></asp:Label>
</div>
</form>
</body>
</html>
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