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MVC - validation for dropdownlist

Posted By:      Posted Date: October 19, 2010    Points: 0   Category :ASP.Net
I've used the Html.DropDownListFor - which binds data from viewmodel .It works fine from database but the validation message for that control is not working.Can you suggest how to give the validation using mvc.
My sample code snippets as follows:

<%= Html.DropDownListFor(model => model.NewsCategoryId, (IEnumerable<SelectListItem>)ViewData["news"], "--Select News--", new { id = "ddlnews" })%>

<%= Html.ValidationMessageFor(model => model.Newsid) %>

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