如何在迭代的IEnumerable&LT角色; ApplicationUser>在剃刀视图显示角色名称 [英] How to iterate Roles in IEnumerable<ApplicationUser> and display role names in razor view

问题描述

PM。我的一个观点得到所有用户的列表与此GET控制器操作：

Am using Identity 2.1.0 with MVC and razor Views. One of my views gets a list of all users with this GET Controller Action:

public async Task<ActionResult> Users()
{
    return View(await UserManager.Users.ToListAsync());
}

在查看有一个foreach，通过每个用户进行迭代，并显示通常的要知道像电子邮件地址，用户名等信息，我想如果有也是通过每个用户的角色迭代，这样我可以显示每个用户像这样的角色成员资格的方式：

Within the View there is a foreach that iterates through each user and displays the usual information like email address, username, etc. I would like to know if there is also a way of iterating through the roles for each user so that I can display the role membership of each user something like this:

Customer
Employee

我一直没能想出解决办法。我的问题的部分原因是，我没有任何智能感知剃刀视图中，并一直无法找到任何关于谷歌的帮助。

I haven't been able to figure this out. Part of my problem is that I don't have any Intellisense within razor views and haven't been able to find anything helpful on Google.

视图模型是 @model IEnumerable的< XXXX_My_App.Models.ApplicationUser> 。 ApplicationUser有一个基类IdentityUser的。

The View Model is @model IEnumerable<XXXX_My_App.Models.ApplicationUser>. ApplicationUser has a base class of IdentityUser.

推荐答案

最简单的方法是创建一个自定义的视图模型，其中包含用户本身和角色他是成员。实现可能如下所示：

The easiest way would be to create a custom ViewModel which contains the user itself and the roles he is member of. An implementation could look like the following:

控制器

public async Task<ViewResult> Users()
{
    var users = UserManager.Users;
    var model = new Collection<UserRoleViewModel>();

    foreach (var user in users)
    {
        var roles = await UserManager.GetRolesAsync(user.Id);
        var rolesCollection = new Collection<IdentityRole>();

        foreach (var role in roles)
        {
            var role = await RoleManager.FindByNameAsync(roleName);
            rolesCollection.Add(role);
        }

        model.Add(new UserRoleViewModel { User = user, Roles = rolesCollection });
    }

    return View("Users", model);
}

UserRoleViewModel

public class UserRoleViewModel
{
    public ApplicationUser User { get; set; }

    public Collection<IdentityRole> Roles { get; set; }
}

使用，你可以用下面的模型在视图中遍历相应的属性。

With that you can use the following model in your view to iterate over the appropriate properties

@model ICollection<YourProject.Models.UserRoleViewModel>

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