具有键“Shape”的 ViewData 项属于类型“System.String”，但它必须属于类型“IEnumerable<SelectListItem

具有键“Shape”的 ViewData 项属于类型“System.String”，但它必须属于类型“IEnumerable<SelectListItem>”。

行 107:                            <span class="label UserEditlabel">体型：</span>
行 108:                            <div class="fl">
行 109:                                <%= Html.DropDownList("Shape")%>
行 110:                                
行 111:                            </div>　　

出错原因： 忘了设置ViewData["shape"]为SelectList类型，SelectList实现了 "IEnumerable<SelectListItem>"接口 

[Serializable]
    public class ProfileInformation

{

        public static SelectList GetShapeList(String shape)
        {
            List<SelectListItem> shapeList = new List<SelectListItem>()
            {
                new SelectListItem() { Value = "F", Text = "偏胖" },
                new SelectListItem() { Value = "N", Text = "正常" },
                new SelectListItem() { Value = "T", Text = "偏瘦" }
            };
           
            return new SelectList(shapeList, "Value", "Text", shape);
        }

}

    [Authorize]
    public ActionResult UserProfile()

{

            string id = HttpContext.User.Identity.Name.ToString();
            ProfileBase profileBase;
            if (!String.IsNullOrEmpty(id))
            {
                profileBase = ProfileBase.Create(id);
            }
            else
            {
                profileBase = HttpContext.Profile as ProfileBase;
            }

            ProfileInformation profile =( ProfileInformation) profileBase.GetPropertyValue("ProfileInformation") ;

           ViewData["shape"] = ProfileInformation.GetShapeList(profile.Shape);   //此处设置ViewData["shape"]为SelectList类型即可

}