<div class="form-group">
    <label for="category" class="control-label">类别：</label>
    @Html.ForDropDownList("category", Log.FindAllCategoryName(), Request["category"], "全部", true)
</div>
<div class="form-group">
    <label for="userid" class="control-label">用户：</label>
    @Html.ForDropDownList("userid", UserX.FindAllWithCache(), "全部", true)
</div>
@Html.Partial("_DateRange")