如何通过手动赋值来使用@Html.DropDownList？ [复制]

Posted 2023-03-05

【中文标题】如何通过手动赋值来使用@Html.DropDownList？ [复制]

【英文标题】：How to use @Html.DropDownList by giving values manually? [duplicate]

【发布时间】：2017-08-25 11:49:01

【问题描述】：

我想在没有任何模型的情况下使用@html.DropDownList，就像我们在普通html中使用select一样。

请恢复，谢谢！

【问题讨论】：

为什么不直接使用普通的html？

因为我想将来自控制器的值绑定为其默认值。 @DaveBecker

【参考方案1】：

它很简单，你可以理解我们下面的例子。

@Html.DropDownList("selectedState", new List<SelectListItem>
                                
                                    new SelectListItem Text = "Not verified", Value = "1",
                                    new SelectListItem Text = "Verified", Value = "2",
                                    new SelectListItem Text = "Migrated", Value = "3"
                                    new SelectListItem Text = "Completed", Value = "4"
                                , "All states", new  @onchange = "form.submit();", @class = "form-control" )

【参考方案2】：

你可以在没有模型的情况下使用@Html.Dropdownlist 例如在控制器中设置下拉列表的值，

var dates = new List<SelectListItem>
new SelectListItem Selected = false, Text = "Show offers for all dates", Value = "",
new SelectListItem Selected = false, Text = "Show offers for today", Value = today.ToShortDateString(),
new SelectListItem Selected = false, Text = "Show offers for this week", Value = endOfThisWeek.ToShortDateString(),
new SelectListItem Selected = false, Text = "Show offers for this month", Value = endOfThisMonth.ToShortDateString(),
new SelectListItem Selected = false, Text = "Show offers for further out", Value = all.ToShortDateString(),;
ViewBag.Dropdowndata = dates;

您可以从 View 访问 Viewbag 的值并将其设置为下拉列表，如

@using (Html.BeginForm())
        
            <label>
                Select Dates</label>
            @Html.DropDownList("Dates", (IEnumerable<SelectListItem>)ViewBag.Dropdowndata, "---Select---", new  id = "dateList" ,@class = "form-control" );