ASP.NET RequiredFieldValidator not working with DropDownList Firefox 6

Having an issue validating a dropdownlist with a requiredfieldvalidator in Firefox 6. The code I have works in all browsers, except Firefox 6.

Here is what happens, I select a value from the dropdownlist that is not the default value and click the button. An error message is returned, meaning validation failed even though I have selected a different field. If I do this again, and select the SAME value from the dropdownlist and clic开发者_开发问答k the button. No error message, it passes validation. This only fails the first time you select a value, and only in Firefox 6.

Another example, load up the page, select a value, select the same value again, click the button, and it passes. WTH?

<asp:dropdownlist id="ddlHour" cssclass="select select-small" runat="server">
  <asp:listitem value="" text="" selected="true"></asp:listitem>
  <asp:listitem value="1">1</asp:listitem>
  <asp:listitem value="2">2</asp:listitem>
</asp:dropdownlist>
<asp:requiredfieldvalidator id="rfvHour" initialvalue="" controltovalidate="ddlHour" errormessage="Please select an hour" display="none" validationgroup="banquetForm" runat="server"/>

And I have a button with the same validation group later on in the form. Any help is appreciated, thanks.

Try using the following:

<asp:dropdownlist id="ddlHour" cssclass="select select-small" runat="server">  
  <asp:listitem value="0" Text="" selected="true"></asp:listitem>  
  <asp:listitem value="1">1</asp:listitem>  
  <asp:listitem value="2">2</asp:listitem>  
</asp:dropdownlist>  
      <asp:RequiredFieldValidator ID="HourValidate" runat="server" ControlToValidate="ddlHour" ErrorMessage="Please select an hour" InitialValue="0"></asp:RequiredFieldValidator>

how to set required field validator with DropDownList

suppose you are having this items in your dropdownlist..

        DropDownList1.Items.Add(new ListItem("--Select--","0"));
        DropDownList1.Items.Add(new ListItem("Kaushal","1"));
        DropDownList1.Items.Add(new ListItem("Naresh","2"));
        DropDownList1.Items.Add(new ListItem("Pankaj", "3"));

Then -: set the requiredfieldvalidator's controltovalidate property to DropDownlist1 and set the InitialValue property of the requiredfieldvalidator to 0 as this will be the value for
--Select-- you can show above.

Correct me if I'm wrong, but I think you are using the wrong validator. By default, a dropdown always has a value, so making it required doesn't make sense. I think what you want to do is compare it, to make sure it's not the first choice. This page shows a quick demo of how to do that.

http://forums.asp.net/t/1188035.aspx/1