asp.net-mvc 使用 ASP.NET MVC ViewBag 和 DropDownListfor 时遇到困难
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Having difficulty using an ASP.NET MVC ViewBag and DropDownListfor
提问by learning
My difficulty is how to use ViewBagwith DropdownListFor?
我的难点是如何使用ViewBagwith DropdownListFor？
In my controller I am having:
在我的控制器中，我有：
TestModel model = new TestModel();
ViewBag.Clients = model.Clients;
ViewBag.StatusList = model.StatusList;
ViewBag.enumStatus = model.enumStatus;
ViewBag.intClient = model.intClient;
In my TestModel
在我的测试模型中
public SelectList Clients { get; set; }
public SelectList StatusList { get; set; }
public ActiveStatus enumStatus { get; set; }
public int? intClient { get; set; }
In my View
在我看来
I want to use DropDownListForto display the ViewBag values, how can I do that?
我想用来DropDownListFor显示 ViewBag 值，我该怎么做？
回答by Darin Dimitrov
You could do this:
你可以这样做：
@Html.DropDownListFor(x => x.intClient, ViewBag.Clients)
But I would recommend you to avoid ViewBag/ViewData and profit from your view model:
但我建议您避免使用 ViewBag/ViewData 并从您的视图模型中获利：
public ActionResult Index()
{
var model = new TestModel();
model.Clients = new SelectList(new[]
{
new { Value = "1", Text = "client 1" },
new { Value = "2", Text = "client 2" },
new { Value = "3", Text = "client 3" },
}, "Value", "Text");
model.intClient = 2;
return View(model);
}
and in the view:
并在视图中：
@Html.DropDownListFor(x => x.intClient, Model.Clients)
回答by DavidAndroidDev
Personally...I create a List and do this.
就个人而言……我创建了一个列表并执行此操作。
public ActionResult SomeAction()
{
var list = new List<SelectListItem>();
list.Add(new SelectListItem(){Text = "One", Value="One"});
list.Add(new SelectListItem(){Text = "Two", Value="Two"});
list.Add(new SelectListItem(){Text = "Three", Value="Three"});
list.Add(new SelectListItem(){Text = "Four", Value="Four"});
ViewBag.Clients = list;
return View();
}
and then in your view...
然后在你看来...
@Html.DropDownListFor(x => x.SomePropertyOnModel, (IEnumerable<SelectListItem>)ViewBag.Clients);
Notice the cast on the Viewbag item. The cast is required because the viewbag has no idea what the object is for Viewbag.Client. So the cast there is required.
注意 Viewbag 项目上的演员表。强制转换是必需的，因为查看包不知道对象是做什么的Viewbag.Client。所以需要演员阵容。
回答by Martin
@Html.DropDownListFor(x => x.intClient, new SelectList(Model.Clients, "ClientId", "ClientName"), string.Empty);
The ClientId is the value of the dropdown option.
ClientId 是下拉选项的值。
The ClientName is the text of the dropdown option.
ClientName 是下拉选项的文本。
The string.Emptyat the end adds a blank entry to the dropdown.
最后string.Empty在下拉列表中添加了一个空白条目。
回答by Campinho
Here you can find a good reference: http://blogs.msdn.com/b/nunos/archive/2010/02/08/quick-tips-about-asp-net-mvc-editor-templates.aspx
在这里你可以找到一个很好的参考：http: //blogs.msdn.com/b/nunos/archive/2010/02/08/quick-tips-about-asp-net-mvc-editor-templates.aspx
