MVC - 在DropDownList中

Question

基于此代码（自动生成的控制/查看从Visual Studio代码）字符串的显示列表：

<div class="form-group"> 
    @Html.LabelFor(model => model.Type, htmlAttributes: new { @class = "control-label col-md-2" }) 
    <div class="col-md-10"> 
     @*Comment: Want to replace EditorFor to DropDownList("Banana, "Apple", "Orange"*@ 
     @Html.EditorFor(model => model.Type, new { htmlAttributes = new { @class = "form-control" } })*@ 
     @Html.ValidationMessageFor(model => model.Type, "", new { @class = "text-danger" }) 
    </div> 
</div> 

我想补充相似喜欢的东西：

@Html.DropDownList("UserId", null, htmlAttributes: new { @class = "form-control" }) 

代替 @html.EditorFor...

（也自动生成的代码，但对于UserId）我能看到的UserName列表（值= Id）的F通过控制器ROM DB：

ViewBag.UserId = new SelectList(db.Users, "Id", "UserName", Test.UserId); 

现在，我不希望这样ViewBag从数据库中读取，而不是我希望它列出我将用它来让用户选择了INDATA（意思3个不同的字符串，限制他们选择这3个字符串中的一个来代替它）。

字符串我希望它列出：

• “香蕉”
• “苹果”
• “橙色”

我该怎么办呢？

Answer 1

试试这个做的另一种方式，

@Html.DropDownList("DropDown", new List<SelectListItem> 
           { new SelectListItem { Text = "Banana", Value = "1", Selected=true}, 
            new SelectListItem { Text = "Apple", Value = "2"}, 
            new SelectListItem { Text = "Orange", Value = "3"} 
            }, "Select Fruit") 

或

0123在模型

获得价值

@Html.DropDownListFor(x => x.Id, new List<SelectListItem> 
           { new SelectListItem { Text = "Banana", Value = "1", Selected=true}, 
            new SelectListItem { Text = "Apple", Value = "2"}, 
            new SelectListItem { Text = "Orange", Value = "3"} 
            }, "Select Fruit") 

Answer 2

只需将您指定的内容更改为ViewBag.UserId即可。像这样：

var fruits = new List<string> { "Banana", "Apple", "Orange" }; 
ViewBag.Fruits = fruits.Select(f => new SelectListItem { Text = f, Value = f }); 

Answer 3

这是你如何建立你的列表项：

ViewBag.Fruits = new SelectList(
    new List<SelectListItem> 
    { 
     new SelectListItem { Selected = true, Text = string.Empty, Value = "-1"}, 
     new SelectListItem { Selected = false, Text = "Banana", Value = 0}, 
     new SelectListItem { Selected = false, Text = "Apple", Value = 1}, 
    }, "Value" , "Text", 1); 

Answer 4

下面是使用枚举

public enum Fruit { Banana, Apple, Orange } 

@Html.DropDownList("FruitSelection", 
        new SelectList(Enum.GetValues(typeof(Fruit))), 
        "Select Fruit", 
        new { @class = "form-control" })