@ Html.DropDownListFor如何添加选项? [英] @Html.DropDownListFor How to add option?

问题描述

@Html.DropDownListFor(model => model.ZipFile, new SelectList(ViewBag.ZipFiles))

上面的代码为我创建了一个选择列表.但是我想将选择设为可选.不幸的是，没有空选项，我想添加一个.我该怎么做?

The above code creates me a select list just fine. But I want to make the selection optional. Unfortunately there is no empty option and I'd like to add one in. How would I do this?

推荐答案

通过使用适当的DropDownListFor重载:

@Html.DropDownListFor(
    model => model.ZipFile, 
    new SelectList(ViewBag.ZipFiles),
    "-- please select a zip file --"
)

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