将选项添加到 razor asp.net mvc 中的下拉列表

Question

I have this dropdownlist:

@Html.DropDownList("CategoryID", new SelectList(ViewBag.Categories, "Id", "Name"),"Select category", new { @class = "form-select mt-3" })

I want to add a value of null to "Select category", specifically in razor, not in the controller.

Any help would be appreciated.

Answer 1

try it like that:

<select asp-for="YourProperty">
<option value="" selected>Select category</option>
@foreach(var item in YourList){
    <option value="@item.Id">@item.YourValue</option>
}
</select>