填充MVC Html.DropDownList的问题 [英] Issues Populating MVC Html.DropDownList

问题描述

我正在尝试使用以下字典的内容填充DropDownList:

I am trying to poulate a DropDownList with the contents of a Dictionary which is like this:

public static readonly IDictionary<string, string> VideoProviderDictionary = new Dictionary<string, string>
                {
                {"1", "Atlantic"},
                {"2", "Blue Ridge"},
                ...

对于该模型，我有:

public string[] VideoProvider { get; set; }
            public IEnumerable<SelectListItem> Items { get; set; }

在控制器中，我试图填充列表:

In the controller, I am trying to populate the list:

 [HttpGet]
       public ActionResult Register()
       {
            var model = new RegisterViewModel();
            model.Items = new SelectList(VideoProviders.VideoProviderDictionary);

           return View(model);
       }

问题出在标记中，使用lambda表达式的DropDownList没有重载:

The issue is in the markup, there is no overload for DropDownList that takes a lambda expression:

 @Html.DropDownList(Model -> model.Items)

我尝试使用:

 @Html.DropDownListFor(model => model.Items)

但是我得到了错误:

CS1501: No overload for method 'DropDownListFor' takes 1 arguments

推荐答案

控制器:

[HttpGet]
   public ActionResult Register()
   {
        var model = new RegisterViewModel();
        Viewbag.Items = new SelectList(VideoProviders.VideoProviderDictionary);
        ......
        ......
        return View(model);
   }

查看:

@Html.DropDownList("VideoProvider",Viewbag.Items as SelectList)

对于强类型下拉列表，请执行以下操作:

OR For strongly typed dropdownlist do this :

@Html.DropDownListFor(model=>model.VideoProvider,Viewbag.Items as SelectList)

型号:

public string VideoProvider { get; set; }   //Correct here
public IEnumerable<SelectListItem> Items { get; set; }  //if you are using Viewbag to bind dropdownlist(which is a easiest and effective way in MVC) then you don't need any model property for dropdown,you can remove this property.

这篇关于填充MVC Html.DropDownList的问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！