MVC实现RadioButtonList

                List<KeyValuePair<string, bool>> secrecyList = new List<KeyValuePair<string, bool>>();
                var secrecyLevelList = baseTypeDetailRepository.GetBaseTypeDetailList(BaseType.SecrecyLevel);
                foreach (var item in secrecyLevelList)
                {
                    if (auth.SecrecyLevel == item.Caption)
                    {
                        secrecyList.Add(new KeyValuePair<string, bool>(item.Caption, true));
                    }
                    else
                    {
                        secrecyList.Add(new KeyValuePair<string, bool>(item.Caption, false));
                    }
                }

                    @if (ViewBag.SecrecyList != null)
                    {
                        foreach (KeyValuePair<string, bool> item in ViewBag.SecrecyList)
                        {
                            if (item.Value)
                            {
                        @Html.RadioButton("SecrecyLevel", item.Key, new { @id = item.Key, @checked = true }) <span> @item.Key </span>
                            }
                            else
                            {
                        @Html.RadioButton("SecrecyLevel", item.Key, new { @id = item.Key }) <span> @item.Key </span>                                
                            }
                        }
                    }