C# 适用于'类型的构造函数；System.Collections.Generic.IEnumerable`1[TeamCloud.Areas.Identity.Data.TeamCloudUser]'；找不到_C#_Entity Framework_Asp.net Core_Entity Framework Core_Asp.net Identity

C# 适用于'类型的构造函数；System.Collections.Generic.IEnumerable`1[TeamCloud.Areas.Identity.Data.TeamCloudUser]'；找不到

c# entity-framework asp.net-core entity-framework-core

C# 适用于'类型的构造函数；System.Collections.Generic.IEnumerable`1[TeamCloud.Areas.Identity.Data.TeamCloudUser]'；找不到,c#,entity-framework,asp.net-core,entity-framework-core,asp.net-identity,C#,Entity Framework,Asp.net Core,Entity Framework Core,Asp.net Identity,我正在用IdentityFramework处理我的ASP NET核心项目，现在我需要在RazorPage上的参数表中显示用户列表。此外，我无法想象如何将对象从razor OnGet方法移动到视图（我需要移动成员对象并在视图上显示它）。无论如何，我只需要显示具有与登录用户类似的团队的用户（请参阅下面的代码），但我遇到了这个错误。希望你能帮助我。谢谢错误 MembersList.cshtml @page @using TeamCloud.Areas.Identity.Pages.Team.Man

我正在用IdentityFramework处理我的ASP NET核心项目，现在我需要在RazorPage上的参数表中显示用户列表。此外，我无法想象如何将对象从razor OnGet方法移动到视图（我需要移动成员对象并在视图上显示它）。无论如何，我只需要显示具有与登录用户类似的团队的用户（请参阅下面的代码），但我遇到了这个错误。希望你能帮助我。谢谢

错误

MembersList.cshtml

@page
@using TeamCloud.Areas.Identity.Pages.Team.Manage
@model IEnumerable<TeamCloudUser>
@{
   ViewData["Title"] = "Список участников";
   ViewData["ActivePage"] = ManageNavPages.MembersList;
 }
 <br />
 <div style="text-align: center;">
     <h2 style="font-weight: 700;">Настройки команды</h2>
 </div>
 <hr />
 <partial name="_ManageNav" />
 <hr />

 <body class="index">
<form method="post" asp-page="MembersList">
    <h4 style="font-weight: 700; text-align: center;">@ViewData["Title"]</h4>
    <div class="text-center">
        <input type="submit" asp-page-handler="AddMember" class="btn alert-primary" value="Добавить участника" style="cursor: pointer; font-weight: 700;" />
        <br />
        <table class="table" style="text-align: center">
            <tr>
                <th>
                    <a>Имя</a>
                </th>
                <th>
                    <a>Почта</a>
                </th>
                <th>
                    <a>Кол-во файлов</a>
                </th>
                <th>
                    <a>Объем памяти</a>
                </th>
                <th>
                    <a>Действия</a>
                </th>
            </tr>
            @foreach (var member in Model.TeamCloudUsers)
            {
                <tr>
                    <td>
                        @Html.DisplayFor(modelItem => member.ProfileName)
                    </td>
                    <td>
                        @Html.DisplayFor(modelItem => member.Email)
                    </td>
                    <td>
                        @Html.DisplayFor(modelItem => member.TotalFiles)
                    </td>
                    <td>
                        @Html.DisplayFor(modelItem => member.TotalSize)
                    </td>
                    <td>
                        @if (@member.IsBlockedToUpload == true)
                        {
                            <a href="" data-toggle="modal" data-target="#modalOnAllow" class="">
                                <img style="width: 30px;" src="~/Media/MenuIcons/allow.png" title="Заблокировать" />
                            </a>
                        }
                        else
                        {
                            <a href="" data-toggle="modal" data-target="#modalOnBlock" class="">
                                <img style="width: 30px;" src="~/Media/MenuIcons/block.png" title="Заблокировать" />
                            </a>
                        }
                        <a href="" data-toggle="modal" data-target="#modalOnDelete" class="">
                            <img style="width: 30px;" src="~/Media/MenuIcons/delete.png" title="Выгнать" />
                        </a>

                        <!--modalOnBlock-->
                        <div class="modal fade" id="modalOnBlock" tabindex="-1" role="dialog" aria-labelledby="title" aria-hidden="true">
                            <div class="modal-dialog modal-dialog-centered" role="document">
                                <div class="modal-content">
                                    <div class="modal-header">
                                        <h5 class="modal-title" id="title">Блокировка пользователя</h5>
                                        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                                            <span aria-hidden="true">&times;</span>
                                        </button>
                                    </div>
                                    <div class="modal-body">
                                        Запретить участнику "@member.Email" загружать новые файлы в командное хранилище?.
                                    </div>
                                    <div class="modal-footer">
                                        <button type="submit" asp-page-handler="BlockToUpload" class="btn alert-primary" value="@member.Id" name="userId">Запретить</button>
                                        <button type="button" class="btn alert-primary" data-dismiss="modal">Отмена</button>
                                    </div>
                                </div>
                            </div>
                        </div>

                        <!--modalOnAllow-->
                        <div class="modal fade" id="modalOnAllow" tabindex="-1" role="dialog" aria-labelledby="title" aria-hidden="true">
                            <div class="modal-dialog modal-dialog-centered" role="document">
                                <div class="modal-content">
                                    <div class="modal-header">
                                        <h5 class="modal-title" id="title">Разблокировка пользователя</h5>
                                        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                                            <span aria-hidden="true">&times;</span>
                                        </button>
                                    </div>
                                    <div class="modal-body">
                                        Предоставить пользователю "@member.Email" доступ к загрузке файлов в хранилище команды?
                                    </div>
                                    <div class="modal-footer">
                                        <button type="submit" asp-page-handler="AllowToUpload" class="btn alert-primary" value="@member.Id" name="userId">Разрешить</button>
                                        <button type="button" class="btn alert-primary" data-dismiss="modal">Отмена</button>
                                    </div>
                                </div>
                            </div>
                        </div>

                        <!--modalOnDelete-->
                        <div class="modal fade" id="modalOnDelete" tabindex="-1" role="dialog" aria-labelledby="title" aria-hidden="true">
                            <div class="modal-dialog modal-dialog-centered" role="document">
                                <div class="modal-content">
                                    <div class="modal-header">
                                        <h5 class="modal-title" id="title">Исключение пользователя</h5>
                                        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                                            <span aria-hidden="true">&times;</span>
                                        </button>
                                    </div>
                                    <div class="modal-body">
                                        Исключить пользователя "@member.Email" из команды? (тут подумать над удалением его файлов)
                                    </div>
                                    <div class="modal-footer">
                                        <button type="submit" asp-page-handler="DeleteFromTeam" class="btn alert-primary" value="@member.Id" name="userId">Исключить</button>
                                        <button type="button" class="btn alert-primary" data-dismiss="modal">Отмена</button>
                                    </div>
                                </div>
                            </div>
                        </div>
                    </td>
                </tr>
            }
        </table>
    </div>
</form>

}

您首先需要学习如何在razor页面中入门：

Razor页面不使用

@modelmodelname

，它使用

@modelmodel

，这与mvc不同

根据您的要求，您不知道如何在razor页面中返回模型。更改如下：

MembersList.cshtml：

@page
@model MembersListModel    //change here
<body class="index">
    <form method="post" asp-page="MembersList">
        <h4 style="font-weight: 700; text-align: center;">@ViewData["Title"]</h4>
        <div class="text-center">
            <input type="submit" asp-page-handler="AddMember" class="btn alert-primary" value="Добавить участника" style="cursor: pointer; font-weight: 700;" />
            <br />
            <table class="table" style="text-align: center">
                <tr>
                    <th>
                        <a>Имя</a>
                    </th>
                    //....
                </tr>
                @foreach (var member in Model.TeamCloudUsers)
            {
                <tr>
                    <td>
                        @Html.DisplayFor(modelItem => member.ProfileName)
                    </td>
                    <td>
                        @Html.DisplayFor(modelItem => member.Email)
                    </td>
                    <td>
                        @Html.DisplayFor(modelItem => member.TotalFiles)
                    </td>
                    <td>
                        @Html.DisplayFor(modelItem => member.TotalSize)
                    </td>
                    <td>
                        @if (@member.IsBlockedToUpload == true)
                        {
                            <a href="" data-toggle="modal" data-target="#modalOnAllow" class="">
                                <img style="width: 30px;" src="~/Media/MenuIcons/allow.png" title="Заблокировать" />
                            </a>
                        }
                        else
                        {
                            <a href="" data-toggle="modal" data-target="#modalOnBlock" class="">
                                <img style="width: 30px;" src="~/Media/MenuIcons/block.png" title="Заблокировать" />
                            </a>
                        }
                        <a href="" data-toggle="modal" data-target="#modalOnDelete" class="">
                            <img style="width: 30px;" src="~/Media/MenuIcons/delete.png" title="Выгнать" />
                        </a>

                        <!--modalOnBlock-->
                        <div class="modal fade" id="modalOnBlock" tabindex="-1" role="dialog" aria-labelledby="title" aria-hidden="true">
                            <div class="modal-dialog modal-dialog-centered" role="document">
                                <div class="modal-content">
                                    <div class="modal-header">
                                        <h5 class="modal-title" id="title">Блокировка пользователя</h5>
                                        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                                            <span aria-hidden="true">&times;</span>
                                        </button>
                                    </div>
                                    <div class="modal-body">
                                        Запретить участнику "@member.Email" загружать новые файлы в командное хранилище?.
                                    </div>
                                    <div class="modal-footer">
                                        <button type="submit" asp-page-handler="BlockToUpload" class="btn alert-primary" value="@member.Id" name="userId">Запретить</button>
                                        <button type="button" class="btn alert-primary" data-dismiss="modal">Отмена</button>
                                    </div>
                                </div>
                            </div>
                        </div>

                        <!--modalOnAllow-->
                        <div class="modal fade" id="modalOnAllow" tabindex="-1" role="dialog" aria-labelledby="title" aria-hidden="true">
                            <div class="modal-dialog modal-dialog-centered" role="document">
                                <div class="modal-content">
                                    <div class="modal-header">
                                        <h5 class="modal-title" id="title">Разблокировка пользователя</h5>
                                        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                                            <span aria-hidden="true">&times;</span>
                                        </button>
                                    </div>
                                    <div class="modal-body">
                                        Предоставить пользователю "@member.Email" доступ к загрузке файлов в хранилище команды?
                                    </div>
                                    <div class="modal-footer">
                                        <button type="submit" asp-page-handler="AllowToUpload" class="btn alert-primary" value="@member.Id" name="userId">Разрешить</button>
                                        <button type="button" class="btn alert-primary" data-dismiss="modal">Отмена</button>
                                    </div>
                                </div>
                            </div>
                        </div>

                        <!--modalOnDelete-->
                        <div class="modal fade" id="modalOnDelete" tabindex="-1" role="dialog" aria-labelledby="title" aria-hidden="true">
                            <div class="modal-dialog modal-dialog-centered" role="document">
                                <div class="modal-content">
                                    <div class="modal-header">
                                        <h5 class="modal-title" id="title">Исключение пользователя</h5>
                                        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                                            <span aria-hidden="true">&times;</span>
                                        </button>
                                    </div>
                                    <div class="modal-body">
                                        Исключить пользователя "@member.Email" из команды? (тут подумать над удалением его файлов)
                                    </div>
                                    <div class="modal-footer">
                                        <button type="submit" asp-page-handler="DeleteFromTeam" class="btn alert-primary" value="@member.Id" name="userId">Исключить</button>
                                        <button type="button" class="btn alert-primary" data-dismiss="modal">Отмена</button>
                                    </div>
                                </div>
                            </div>
                        </div>
                    </td>
                </tr>
            }
            </table>
        </div>
    </form>
</body>

@page
@模型成员建模//在此处更改
@ViewData[“标题”]


}
其他的
{
}
Блокировка пользователя
&时代；
电子邮箱：ember.Email？。
Запретить
Отмена
Разблокировка пользователя
&时代；
ППззззазззззззззззззззззззззз107？
Разрешить
Отмена
Исключение пользователя
&时代；
ззззззззззззззззззззз？(тут подумать над удалением его файлов)
Исключить
Отмена
}

MembersList.cshtml.cs：

public class MembersListModel : PageModel
{
    //1. add the following property
    public IEnumerable<TeamCloudUser> TeamCloudUsers { get; set; }
    
    public void OnGet()
    {
        //2. set data for the property
        //for easy testing,I hard-coded the data
        //you could get the data from database
        //e.g. TeamCloudUsers = _context.AspNetUserTeams
        //                              .Where(x => x.TeamId == currentTeamId).ToList();
        TeamCloudUsers = new List<TeamCloudUser>()
        {
            new TeamCloudUser(){ ProfileName ="a",IsBlockedToUpload=false,Email="a@qq.com",TotalFiles=2,TotalSize="34"}
        };
    }
}

public类成员stmodel:PageModel
{
//1.添加以下属性
公共IEnumerable TeamCloudUsers{get；set；}
公共互联网
{
//2.为属性设置数据
//为了便于测试，我对数据进行了硬编码
//您可以从数据库中获取数据
//e、 g.TeamCloudUsers=\u context.AspNetUserTeams
//.Where（x=>x.TeamId==currentTeamId）.ToList（）；
TeamCloudUsers=新列表（）
{
new TeamCloudUser（）{ProfileName=“a”，IsBlockedToUpload=false，Email=a@qq.com，TotalFiles=2，TotalSize=“34”}
};
}
}

结果:

更新：

将代码修改为：

                                         // change here...
<a href="" data-toggle="modal" data-target="#modalOnBlock_@member.Id" class="">
                                <img style="width: 30px;" src="~/Media/MenuIcons/block.png" title="Заблокировать" />
</a>
<!--modalOnBlock-->
                                 //change here...
<div class="modal fade" id="modalOnBlock_@member.Id" tabindex="-1" role="dialog" aria-labelledby="title" aria-hidden="true">

//在这里更改。。。
//在这里换车。。。

因此我得到了一个新错误：InvalidOperationException：已经有一个与此连接关联的打开的DataReader，必须先关闭它。在行TeamCloudUsers=_context.Users.Where（x=>x.Id==member.ToList（）；这是我的OnGet方法：public void OnGet（）{var teamFounder=\u userManager.GetUserId（用户）；currentUserId=teamFounder；int currentTeamId=FindTeamIdByName（）；var teamMembers=\u context.AspNetUserTeams.Where（x=>x.TeamId==currentTeamId）。选择（x=>x.UserId）；foreach（teamMembers中的var成员）{TeamCloudUsers=_context.Users.Where（x=>x.Id==member.ToList（）；}}我很高兴您解决了这个问题。请注意，我认为您需要更改

foreach（teamMembers中的var成员）{TeamCl
public class MembersListModel : PageModel
{
    //1. add the following property
    public IEnumerable<TeamCloudUser> TeamCloudUsers { get; set; }
    
    public void OnGet()
    {
        //2. set data for the property
        //for easy testing,I hard-coded the data
        //you could get the data from database
        //e.g. TeamCloudUsers = _context.AspNetUserTeams
        //                              .Where(x => x.TeamId == currentTeamId).ToList();
        TeamCloudUsers = new List<TeamCloudUser>()
        {
            new TeamCloudUser(){ ProfileName ="a",IsBlockedToUpload=false,Email="a@qq.com",TotalFiles=2,TotalSize="34"}
        };
    }
}

                                         // change here...
<a href="" data-toggle="modal" data-target="#modalOnBlock_@member.Id" class="">
                                <img style="width: 30px;" src="~/Media/MenuIcons/block.png" title="Заблокировать" />
</a>
<!--modalOnBlock-->
                                 //change here...
<div class="modal fade" id="modalOnBlock_@member.Id" tabindex="-1" role="dialog" aria-labelledby="title" aria-hidden="true">