如何在MVC中为下拉列表设置默认值? [英] How to set a default value for dropdownlist in MVC?

问题描述

我正在尝试为下拉列表设置默认值.

I am trying to set a default value for a dropdownlist.

控制器:

ViewData [年龄"] ＝新的SelectList(db.GetGateList()，"myAge")；

ViewData["Ages"] = new SelectList(db.GetGateList(), "myAge");

查看:

< div> @ Html.DropDownListFor(model => model.Age，ViewData ["Ages"] as IEnumerable< SelectListItem> ;, new {style =" width:100px;"}})</div>

<div>@Html.DropDownListFor(model => model.Age, ViewData["Ages"] as IEnumerable<SelectListItem>, new { style = "width: 100px;"})</div>

现在，我要尝试的是将此下拉列表的默认值设置为选定的输入(例如30).

Now, what I am trying to do is to set the default value of this dropdownlist to selected input (say 30).

我尝试了许多不同的选择，但是找不到解决方案.

I tried many different options but couldn't find a solution.

任何建议都会得到赞赏.

Any suggestions would be appreciataed.

Thx

王牌

推荐答案

您好，OP:

假设您的默认选择为1，则可以执行以下操作:

Suppose your default choice is 1, and you can do this:

列表< SelectListItem> items =  ViewData [" Ages] =物品；

List<SelectListItem> items = db.GetGateList();
items[0].Selected=true;
ViewData["Ages"] = items;

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