C# 筛选一个元素但不筛选其他元素的SelectList

所以我在前端有这个：

<%= Html.DropDownListFor(m => m.FixedComponent.PaymentBusinessDayConvention, DropDownData.BusinessDayConventionList(), "", new { @class = "DontShrink", propertyName = "FixedComponent.PaymentBusinessDayConvention", onchange = "UpdateField(this);" })%>

我只想删除一个HTML助手的

BusinessDayConvention.Unadjusted

选项，而不是页面上所有其他助手的选项。我怎样才能做到干净呢

---

谢谢

在方法中包含一个参数：

    public static SelectList BusinessDayConventionList(bool includeUnadjusted)
    {
       var list = ListBuilder(
            BusinessDayConventionHelper.GetFriendlyName(BusinessDayConvention.Following),
            BusinessDayConventionHelper.GetFriendlyName(BusinessDayConvention.ModifiedFollowing),
            BusinessDayConventionHelper.GetFriendlyName(BusinessDayConvention.Preceding));

       if (includeUnadjusted)
       {
         list.Items.Add(BusinessDayConventionHelper.GetFriendlyName(BusinessDayConvention.Unadjusted))
       }

       return list.
    }

您还可以使用重载来传递默认值：

    public static SelectList BusinessDayConventionList()
    {
       return BusinessDayConventionList(true);
    }

    public static SelectList BusinessDayConventionList()
    {
       return BusinessDayConventionList(true);
    }