ASP.NET RequiredFieldValidator : How can i bind value to " InitialValue " property?

Question

I have the following code

<div>
    <asp:DropDownList ID="testDropDownList" runat="server" ValidationGroup="testValidationGroup">
        <asp:ListItem Value="Choose">[ Select Item ... ]</asp:ListItem>
        <asp:ListItem Value="True">Yes</asp:ListItem>
        <asp:ListItem Value="False">No</asp:ListItem>
    </asp:DropDownList>
    <asp:RequiredFieldValidator ID="testRequiredFieldValidator" runat="server" ValidationGroup="testValidationGroup"
        ErrorMessage="*" InitialValue="Choose" ControlToValidate="testDropDownList"></asp:RequiredFieldValidator>
    <br />
    <asp:Button ID="testButton" runat="server" OnClick="testButton_Click" Text="Button"
        ValidationGroup="testValidationGroup" />
    <br />
</div>

in which i validate Dropdownlist by RequiredFieldValidator

If changed the value of initialvalue property to read from static property in stactic classs .. but it always give me emtpy string in runtime unless this property have the value "Choose" ...

<asp:DropDownList ID="testDropDownList" runat="server" ValidationGroup="testValidationGroup">
        <asp:ListItem Value="Choose">[ Select Item ... ]</asp:ListItem>
        <asp:ListItem Value="True">Yes</asp:ListItem>
        <asp:ListItem Value="False">No</asp:ListItem>
    </asp:DropDownList>
    <asp:RequiredFieldValidator ID="testRequiredFieldValidator" runat="server" ValidationGroup="testValidationGroup"
        ErrorMessage="*" InitialValue='<%# Util.ChooseValue %>' ControlToValidate="testDropDownList">
        </asp:RequiredFieldValidator>

    <br />
    <asp:Button ID="testButton" runat="server" OnClick="testButton_Click" Text="Button"
        ValidationGroup="testValidationGroup" />

Could Any one help me to know what's the issue in my code ??

Answer 1

Please call

testRequiredFieldValidator.databind() 

in page load event and let me know if this is still an issue.