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<html>
<body>
<form runat="server">
<asp:DropDownList id="DropDownList1" runat="server">
<asp:ListItem Value="">Please Choose</asp:ListItem>
<asp:ListItem Value="Bleep">Bleep</asp:ListItem>
<asp:ListItem Value="Blob">Blob</asp:ListItem>
<asp:ListItem Value="Blah">Blah</asp:ListItem>
</asp:DropDownList>
<asp:RequiredFieldValidator
id="RequiredFieldValidator1"
runat="server"
ErrorMessage="Please select an item in the DropDownList"
ControlToValidate="DropDownList1"
Display="None">
</asp:RequiredFieldValidator>
<asp:DropDownList id="DropDownList2" runat="server">
<asp:ListItem Value="">Please Choose A Second Item</asp:ListItem>
<asp:ListItem Value="Boing">Boing</asp:ListItem>
<asp:ListItem Value="Bump">Bump</asp:ListItem>
<asp:ListItem Value="Bing">Bing</asp:ListItem>
</asp:DropDownList>
<asp:RequiredFieldValidator
id="RequiredFieldValidator2"
runat="server"
ErrorMessage="Please select an item in the second DropDownList"
ControlToValidate="DropDownList2"
Display="None">
</asp:RequiredFieldValidator>
<asp:Button
id="Button1"
runat="server"
Text="Button">
</asp:Button>
<asp:ValidationSummary
id="ValidationSummary1"
runat="server"
ShowMessageBox="True"
ShowSummary="False">
</asp:ValidationSummary>
</form>
</body>
</html>
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