Multiple constructors accepting all given System.Collections.Generic.List

朱雀 2021-07-27 02:09 301阅读 0赞

出现上述错误的原因是给的List未定义或未找到

在学习ASP.Net Core Razor Page时，使用了ViewModel,按照mvc的逻辑，更改了View的model类型，

系统报上述错误，是自己理解错误，在Razor Page中model应该为IndexModel之类的。自己逻辑有问题；

@page
    @model ContosoUniversity.Pages.Courses.IndexModel
    //这里应该是IndexModel,后面使用model.CourseVM，访问自定义的视图模型
    //这里误写为 List<ContosoUniversity.Model.CourseVM,出现上述错误
    
    @{
        ViewData["Title"] = "Courses";
    }
    
    <h1>Courses</h1>
    
    <p>
        <a asp-page="Create">Create New</a>
    </p>
    <table class="table">
        <thead>
            <tr>
                <th>
                    @Html.DisplayNameFor(model => model.CourseVM[0].CourseId)
                </th>
                <th>
                    @Html.DisplayNameFor(model => model.CourseVM[0].Title)
                </th>
                <th>
                    @Html.DisplayNameFor(model => model.CourseVM[0].Credits)
                </th>
                <th>
                    @Html.DisplayNameFor(model => model.CourseVM[0].DepartmentName)
                </th>
                <th></th>
            </tr>
        </thead>
        <tbody>
            @foreach (var item in Model.CourseVM)
            {
                <tr>
                    <td>
                        @Html.DisplayFor(modelItem => item.CourseId)
                    </td>
                    <td>
                        @Html.DisplayFor(modelItem => item.Title)
                    </td>
                    <td>
                        @Html.DisplayFor(modelItem => item.Credits)
                    </td>
                    <td>
                        @Html.DisplayFor(modelItem => item.DepartmentName)
                    </td>
                    <td>
                        <a asp-page="./Edit" asp-route-id="@item.CourseId">Edit</a> |
                        <a asp-page="./Details" asp-route-id="@item.CourseId">Details</a> |
                        <a asp-page="./Delete" asp-route-id="@item.CourseId">Delete</a>
                    </td>
                </tr>
            }
        </tbody>
    </table>