具有键'name'的viewdata项的类型为'system.string'，但必须是'ienumerable< selectlistitem>'类型。 [英] The viewdata item that has the key 'name' is of type 'system.string' but must be of type 'ienumerable<selectlistitem>'.

问题描述

// GET: /Account/Register
[AllowAnonymous]
public ActionResult Register()
{
    ViewBag.Name = new SelectList(context.Roles.ToList(), "Name", "Name");
    return View();
}

Register.cshtml

----------- ------

Register.cshtml
-----------------

<!--Select the Role Type for the User-->
    <div class="form-group">
        @Html.Label("Select Your User Type", new { @class = "col-md-2 control-label" })
        <div class="col-md-10">
            @*@Html.DropDownList("Name")*@
    @*@Html.DropDownList("Name", (SelectList)ViewBag.Name, "--Choose Role--")*@
            @Html.DropDownList("Name", (SelectList)ViewBag.Name, "--Choose Role--")
            
        </div>
    </div>
    <!--Ends Here-->

我尝试过：

What I have tried:

The ViewData item that has the key 'Name' is of type 'System.String' but must be of type 'IEnumerable<SelectListItem>'.

推荐答案

参考此并将其修复为您的代码



控制器

refer this and fix it in your code

Controller

public class Role
   {
       public string Name { get; set; }
   }


   public class HomeController : Controller
   {
       public ActionResult Index()
       {
           List<Role> lst = new List<Role>();
           lst.Add(new Role() { Name = "Admin" });
           lst.Add(new Role() { Name = "Master" });
           lst.Add(new Role() { Name = "user" });
           ViewBag.Name = new SelectList(lst, "Name", "Name");
           return View();
       }

   }

查看

View

@Html.DropDownList("Name", (SelectList)ViewBag.Name, "--Choose Role--")

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