ASP.NET MVC中，前台DropDownList传值给后台。

List<SelectListItem> ZH = new List<SelectListItem>();
        ZH.Add(new SelectListItem { Text = "ZH1", Value = "ZH1" });
        ZH.Add(new SelectListItem { Text = "ZH2", Value = "ZH2" });
        ZH.Add(new SelectListItem { Text = "ZH3", Value = "ZH3" });

<%= ViewData["ddl"] = ZH %>

<%=Html.DropDownList("ddl")%>

public ActionResult Index(FormCollection collection)
{
    string zh = collection["ddl"] == null ? "" : collection["ddl"].Trim();

}