目标:创建一个可重复使用的下拉菜单,列出我网站的管理员、经理和代理。这些类型的用户由 .NET Simplemembership pages_Roles 和 pages_UsersInRoles 表定义。
到目前为止:我的数据库中有一个 UserProfile 表,它有 25 列。我有一个相应的同名域模型,可以从我的 UsersContext() EF 访问。
下拉菜单只需要列出用户的 FirstName、LastName 和 UserId,因此我没有使用完整的域模型,而是创建了以下 ViewModel:
namespace MyModels.Models.ViewModels
{
public class AdminsAndAgentsListVM
{
public string FirstName { get; set; }
public string LastName { get; set; }
public int UserId { get; set; }
}
}
然后我将以下内容添加到我的帐户控制器中(注意我还没有使用部分视图):
public ActionResult AdminsAndAgentsList()
{
UsersContext _db = new UsersContext(); //provides me access to UserProfiles data
var admins = Roles.GetUsersInRole("Admin"); //gets users with this role
var viewModel = _db.UserProfiles
.Where(x => admins.Contains(x.UserName)); //Selects users who match UserName list
return View(viewModel);
}
然后,我搭建一个列表视图并将其基于强类型 ViewModel:
@model IEnumerable<MyModels.Models.ViewModels.AdminsAndAgentsListVM>
@{
ViewBag.Title = "AdminsAndAgentsList";
}
<h2>AdminsAndAgentsList</h2>
<p>
@Html.ActionLink("Create New", "Create")
</p>
<table>
<tr>
<th>
@Html.DisplayNameFor(model => model.FirstName)
</th>
<th>
@Html.DisplayNameFor(model => model.LastName)
</th>
<th>
@Html.DisplayNameFor(model => model.UserId)
</th>
<th></th>
</tr>
@foreach (var item in Model) {
<tr>
<td>
@Html.DisplayFor(modelItem => item.FirstName)
</td>
<td>
@Html.DisplayFor(modelItem => item.LastName)
</td>
<td>
@Html.DisplayFor(modelItem => item.UserId)
</td>
<td>
@Html.ActionLink("Edit", "Edit", new { /* id=item.PrimaryKey */ }) |
@Html.ActionLink("Details", "Details", new { /* id=item.PrimaryKey */ }) |
@Html.ActionLink("Delete", "Delete", new { /* id=item.PrimaryKey */ })
</td>
</tr>
}
</table>
我做了一个成功的构建,当我运行网页时,我收到以下错误:
传入字典的模型项的类型为“System.Data.Entity.Infrastructure.DbQuery
1[My.Models.UserProfile]', but this dictionary requires a model item of type 'System.Collections.Generic.IEnumerable
1[My.Models.ViewModels.AdminsAndAgentsListVM]”。
如果我重新创建视图但在 UserProfile 中强烈键入它,它工作正常。那么如何重新工作,以便我可以对我的 ViewModel 进行强类型输入呢?如果可能,请提供示例。我是 C# 和 MVC 的新手,亲眼目睹代码确实让我受益匪浅。非常感谢帮助!
编辑 ------------------ 这是 UserProfile 的对象:
public class UsersContext : DbContext
{
public UsersContext()
: base("DefaultConnection")
{
}
public DbSet<UserProfile> UserProfiles { get; set; }
}
[Table("UserProfile")]
public class UserProfile
{
[Key]
[DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
public int UserId { get; set; }
public string UserName { get; set; }
[Required]
[ReadOnly(true)]
[DisplayName("SubscriberID")]
public int? SubscriberId { get; set; } //Foreign key
[StringLength(50, ErrorMessage = "The {0} must be at least {2} characters long.")]
[Display(Name = "First Name")]
public string FirstName { get; set; }
[StringLength(50, ErrorMessage = "The {0} must be at least {2} characters long.")]
[Display(Name = "Last Name")]
public string LastName { get; set; }
//public DateTime DOB { get; set; }
[DataType(DataType.Date)]
public DateTime? DOB { get; set; } //This allows null
public bool? Gender { get; set; }
[Required]
[MaxLength(250)]
[EmailAddress]
public string Email { get; set; }
[MaxLength(250)]
[EmailAddress]
[NotEqualTo("Email", ErrorMessage = "Alt Email and Email cannot be the same.")]
public string AltEmail { get; set; }
[MaxLength(250)]
[EmailAddress]
public string FormEmail { get; set; }
public Address Address { get; set; }
[MaxLength(20)]
public string Telephone { get; set; }
[MaxLength(20)]
public string Mobile { get; set; }
[Required]
[DataType(DataType.Date)]
public DateTime DateAdded { get; set; }
[DataType(DataType.DateTime)]
public DateTime? LastLoginDate { get; set; }
public bool? OffersOptIn { get; set; } //any offers we may have with us or partners
public bool? NewsOptIn { get; set; } //newsletter
public bool? SubscriptionOptIn { get; set; } //account, technical, renewal notices, pp invoices, pp receipts
public bool? OrderOptIn { get; set; } //orders - workflow notices
[DataType(DataType.DateTime)]
public DateTime? LastUpdatedAccountDate { get; set; } //Last time user updated contact info
}