使用viewmodel list属性

Question

我有一个显示两个下拉列表和一个列出任务的表的视图。我想实现对任务的分页。我使用了以下链接 Using a PagedList with a ViewModel ASP.Net MVC实现分页。

但问题是，我需要在所有3种方法（Index，IndexPost，UpdateTask）中进行分页，并且所有这三种方法都使用相同的视图索引。不幸的是，我只能调用一种方法进行分页。例如，每当我点击UpdateTasks方法结果的第二页链接时，它就会重定向到Index页面。但是它应该保持在同一页面上，但是得到UpdateTasks方法第二页的结果。发生这种情况是因为pagedlistpager中的url操作指向index，并且所有方法都使用相同的索引视图。有人可以帮忙吗？

我需要一种方法来识别它所调用的方法以获得正确的结果，而不是总是指向索引方法

public ActionResult Index(int? categoryId, int? page)
        {
            int pageNumber = (page ?? 1);

            var viewModel = new ProjectViewModel();
            if (viewModel.Categories.Any())
            {
                viewModel.SelectedCategory = categoryId != null ? (int)(categoryId) : viewModel.Categories.First().UniqueId;
                GetResults(viewModel, pageNumber);          
            }

            decimal totalPages = ((decimal)(viewModel.Tasks.Count() / (decimal)pageSize));
            ViewBag.TotalPages = Math.Ceiling(totalPages);          
            ViewBag.PageNumber = pageNumber;

            return View(viewModel);
        }

        [HttpPost, ActionName("Index")]
        public ActionResult IndexPost(int? categoryId, int? page)
        {
            int pageNumber = (page ?? 1);
            if (categoryId == null)
            {
                return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
            }
            var viewModel = new ProjectViewModel();
            viewModel.SelectedCategory = (int)categoryId;
            if (ModelState.IsValid)
            {
                GetResults(viewModel, pageNumber);
            }
            return View(viewModel);
        }

        private void GetResults(ProjectViewModel viewModel,  int pageNumber)
        {           
            viewModel.Projects = this._projectService.Projects(viewModel.SelectedCategory); 

            if (viewModel.Projects.Any())
            {
                viewModel.SelectedProject = viewModel.Projects.First().UniqueId;        
                viewModel.Tasks = this._projectService.Tasks(viewModel.SelectedProject).ToPagedList(pageNumber,pageSize);
            }           
        }

        public ActionResult UpdateTasks(int?  projectId, int? categoryId, int? page)
        {           
            int pageNumber = (page ?? 1);

            if (projectId == null || categoryId == null)
            {
                return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
            }
            var viewModel = new ProjectViewModel();
            viewModel.SelectedCategory = (int)categoryId;
            viewModel.SelectedProject = (int)projectId;                     
            viewModel.Projects = this._projectService.Projects(viewModel.SelectedCategory);             
            viewModel.Tasks = this._projectService.Tasks(viewModel.SelectedProject).ToPagedList(pageNumber, pageSize);              

            return View("Index", viewModel);    
        }

   @model ITProjects.ViewModels.ProjectViewModel
@using PagedList.Mvc;
@using PagedList;

@{
    ViewBag.Title = "Home Page";
}


@using (Html.BeginForm())
{
    <div>
        @Html.ActionLink("Create New Project", "CreateProject")
    </div>
    @Html.ValidationSummary(true, "", new { @class = "text-danger" })
    <span>
        @if (Model.Categories != null)
        {
        @Html.DropDownListFor(m => m.SelectedCategory, new SelectList(Model.Categories, "UniqueId", "Name", Model.SelectedCategory), new { @id = "CategoryId", onchange = @"form.action='/Home/Index?categoryId=' +this.value;form.submit();" })
        }

        @if (Model.Projects != null)
        {
        @Html.DropDownListFor(m => m.SelectedProject, new SelectList(Model.Projects, "UniqueId", "Name", Model.SelectedProject), new { @id = "ProjectId" })
        }
    </span>
    @Html.ActionLink("View Project", "Project", new { projectId = Model.SelectedProject }, new { @class = "btn btn-default btn-color" })
    <p></p>
    <p>
        @Html.ActionLink("Create New Task", "CreateTask", new { projectId = Model.SelectedProject })
    </p>
    if (Model.Tasks != null)
    {
        <table class="table">
        <tr>
            <th>
                @Html.DisplayNameFor(model => model.Tasks.First().Description)
            </th>
            <th>
                @Html.DisplayNameFor(model => model.Tasks.First().Staff)
            </th>
            <th>
                @Html.DisplayNameFor(model => model.Tasks.First().Status)
            </th>
            <th>
                @Html.DisplayNameFor(model => model.Tasks.First().HeldBy)
            </th>
            <th>
                @Html.DisplayNameFor(model => model.Tasks.First().Progress)
            </th>
            <th></th>
        </tr>
        @foreach (var item in Model.Tasks)
        {
            <tr>
                <td>
                    @Html.DisplayFor(modelItem => item.Description)
                </td>
                <td>
                    @Html.DisplayFor(modelItem => item.Staff)
                </td>
                <td>
                    @Html.DisplayFor(modelItem => item.Status)
                </td>
                <td>
                    @Html.DisplayFor(modelItem => item.HeldBy)
                </td>
                <td>
                    @Html.DisplayFor(modelItem => item.Progress)
                </td>
                <td>
                    @Html.ActionLink("Edit", "TaskEdit", new { id = item.UniqueId }) |
                    @Html.ActionLink("Details", "Details", new { id = item.UniqueId }) |
                    @Html.ActionLink("Delete", "TaskDelete", new { id = item.UniqueId })
                </td>
            </tr>
        }
    </table>
    }

    @Html.PagedListPager(Model.Tasks, page => Url.Action("Index", new { page }))
 }
    @section Scripts
{
    <script language="javascript" type="text/javascript">
        $(document).ready(function () {

            $("#ProjectId").change(function () {

                var projectId = $('#ProjectId').val();
                var categoryId = $('#CategoryId').val();
                window.location.href = '@Url.Action("UpdateTasks","Home")' + '?projectId=' + projectId + '&categoryId=' + categoryId;
            });

        });
</script>