Blazor：调用方法而不包含在 ConfigureServices 中

Question

我是 Blazor 的新手，我找不到直接的 answer/article。

我有一个从数据库 table 生成的 table 就好了；但是，我不得不补充： services.AddSingleton<ListUserMaint>(); 在我的 Startup.cs 文件中。

我看到其他人在哪里使用 api 路由，例如：/api/ListUserMaint 但是有没有其他方法可以直接调用控制器？我试图让我的控制器分开，我不想每次有新文件时都必须添加 services.AddSingleton<Controller>();。

组件：

@page "/usermaint"
@using Rogue.Controllers
@using Rogue.Models.ViewModels

@inject ListUserMaint ListUsers


@if (users == null)
{
    <p><em>Loading...</em></p>
}
else
{
    <table class="table table-hover table-md">
        <thead>
            <tr>
                <th class="text-left tableHead d-none" id="userId">Id</th>
                <th class="text-left tableHead">CompanyName</th>
                <th class="text-left tableHead">User Name</th>
                <th class="text-left tableHead">First Name</th>
                <th class="text-left tableHead">Last Name</th>
                <th class="text-left tableHead">Title</th>
                <th class="text-left tableHead">City</th>
                <th class="text-left tableHead">State</th>
                <th class="text-left tableHead text-right">Remove</th>
            </tr>
        </thead>
        <tbody>
            @foreach (var u in users)
            {
                <tr>
                    <td>@u.Id</td>
                    <td>@u.CompanyName</td>
                    <td>@u.UserName</td>
                    <td>@u.FirstName</td>
                    <td>@u.LastName</td>
                    <td>@u.Title</td>
                    <td>@u.City</td>
                    <td>@u.State</td>
                    <td>
                        <button class="sqButton btnRed float-right">
                            <i class="glyphicon glyphicon-remove"></i>
                        </button>
                    </td>
                </tr>
            }
        </tbody>
    </table>
}

@code {
    private IEnumerable<ListUsersViewModel.User> users;

    protected override async Task OnInitializedAsync()
    {
        users = await ListUsers.UserMaint();
    }
}

控制器：


namespace Rogue.Controllers
{
    public class ListUserMaint : Controller
    {
        private readonly UserManager<ApplicationUser> userManager;
        private ICompanyRepository companyRepository;

        //constructor
        public ListUserMaint(UserManager<ApplicationUser> userManager, ICompanyRepository companyRepository)
        {
            this.userManager = userManager;
            this.companyRepository = companyRepository;
        }


        [HttpGet]
        public async Task <IEnumerable<ListUsersViewModel.User>> UserMaint()
        {
            //Get users from ApplicationUser
            var users = await userManager.Users.ToListAsync();

            //Create a new model for the List View (It has been extended to include CompanyName
            var model = new ListUsersViewModel();

            foreach (var u in users)
            {
                //Store this information into the List View Model and get the Company Name in the process
                var userinfo = new ListUsersViewModel.User
                {
                    UserName = u.UserName,
                    Id = u.Id,
                    FirstName = u.FirstName,
                    LastName = u.LastName,
                    Title = u.Title,
                    Email = u.Email,
                    CompanyId = u.CompanyId,
                    //CompanyName = u.Company.CompanyName,  //Extended via foreign key
                    City = u.City,
                    State = u.State
                };
                model.Users.Add(userinfo);
            };

            return model.Users;
        }
    }
}

Answer 1

如果您使用控制器进行 CRUD 操作，则不必将其注入 DI 管道。您应该只使用 HttpClient 调用您的端点，并解析您的 json 结果。仅当需要直接从组件中使用它时才需要注入 class/service。

一个好的方法是将所有控制器保存在服务器托管的另一个项目中，这样您就不会在 webassebly 编译代码中发送与数据库交互的所有代码

Blazor：调用方法而不包含在 ConfigureServices 中

Blazor: Calling Methods without including within ConfigureServices

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