我正在使用PagedList.mvc帮助程序处理我的应用程序的分页，在所有示例中，我发现人们倾向于明确设置页面大小。我希望从模型中的数据动态设置页面大小，也可以从数据中创建新页面。
我有上图中规定的表格，我希望第1页是所有条目，其中MonthInt为1，第2页所有条目为MonthInt 2等。但我希望每个页面大小由每个月有多少条目..它目前根据第一页动态设置页面的大小，并且仅限制第一页显示具有MonthInt 1-3的条目，之后它进入下一页但不是遵循相同的规则..任何帮助/建议都会很棒，
控制器代码：
// GET: Customers/Details/5
public ActionResult Details(int? id, string sortOrder, string searchString, string currentFilter, int? page)
{
Customer customer = db.Customers.Find(id);
var viewModel = new CustomerViewModel();
if (id != null)
{
IEnumerable<Vehicle> vehicles = db.Vehicles.Where(c => c.CustomerId == customer.Id);
List<Vehicle> vehiclesList = vehicles.OrderBy(m => m.MonthId).ThenBy(r => r.Register).ToList();
if (searchString != null)
{
page = 1;
}
else
{
searchString = currentFilter;
}
ViewBag.CurrentFilter = searchString;
int pageSize = vehicles.Count(m => m.MonthId <= 3);
int pageNumber = (page ?? 1);
if (!String.IsNullOrEmpty(searchString))
{
vehiclesList = vehicles.Where(r => r.Register.Contains(searchString.ToUpper())
|| r.License.Contains(searchString.ToUpper())).ToList();
}
PagedList<Vehicle> pagedList = new PagedList<Vehicle>(vehiclesList, pageNumber,pageSize);
viewModel = new CustomerViewModel()
{
Vehicles = pagedList,
Customer = customer
};
}
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
if (customer == null)
{
return HttpNotFound();
}
return View(viewModel);
}
查看代码：
@model Application.ViewModels.CustomerViewModel
@using PagedList;
@using PagedList.Mvc
<link href="~/Content/PagedList.css" rel="stylesheet" type="text/css" />
@{
ViewBag.Title = "Fleet Details";
}
<div>
<h2>@Model.Customer.Name</h2>
@using (Html.BeginForm("Details", "Customers", FormMethod.Get))
{
<div class="input-group">
<div class="input-group-btn">
<div class="btn-toolbar">
@Html.TextBox("searchString", ViewBag.CurrentFilter as string, null, new {@class = "form-control", placeholder = "Find by Register/License", autofocus = "autofocus"})
<input class="btn-warning btn" type="submit" value="search"/>
</div>
</div>
</div>
}
<hr />
@if (!Model.Vehicles.Any())
{
<p>No Vehicles loaded</p>
<br />
}
else
{
<table class="table table-hover table-bordered">
<tr>
<th>@Html.DisplayName("Owner")</th>
<th>@Html.DisplayName("License")</th>
<th>@Html.DisplayName("Make")</th>
<th>@Html.DisplayName("Register")</th>
<th>@Html.DisplayName("MonthInt")</th>
<th>@Html.DisplayName("Month")</th>
</tr>
@foreach (var item in Model.Vehicles)
{
<tr>
<td>@Html.DisplayFor(modelItem => item.OwnerName)</td>
<td>@Html.DisplayFor(modelItem => item.License)</td>
<td>@Html.DisplayFor(modelItem => item.Make)</td>
<td>@Html.DisplayFor(modelItem => item.Register)</td>
<td>@Html.DisplayFor(modelItem => item.MonthId)</td>
<td>@Html.DisplayFor(modelItem => item.MonthName)</td>
<td>
<div class="btn-toolbar">
@Html.ActionLink("Edit", "Edit", "Vehicles", new { id = item.VehicleId }, new { @class = "btn btn-primary" })
@Html.ActionLink("Details", "Details", "Vehicles", new { id = item.VehicleId }, new { @class = "btn btn-default" })
@Html.ActionLink("Delete", "Delete", "Vehicles", new { id = item.VehicleId }, new { @class = "btn btn-danger" })
</div>
</td>
</tr>
}
</table>
}
<div class="btn-toolbar">
@Html.ActionLink("Add Vehicle", "Create", "Vehicles", new { id = Model.Customer.Id }, new { @class = "btn-success btn" })
@Html.ActionLink("Edit Customer Name", "Edit", new { id = Model.Customer.Id }, new { @class = "btn btn-primary" })
@Html.ActionLink("Delete Customer", "Delete", new { id = Model.Customer.Id }, new { @class = "btn-danger btn" })
@Html.ActionLink("Back to List", "Index", null, new { @class = "btn-default btn" })
</div>
<br/>
Page @(Model.Vehicles.PageCount < Model.Vehicles.PageNumber ? 0 : Model.Vehicles.PageNumber) of @Model.Vehicles.PageCount
@Html.PagedListPager(Model.Vehicles, page => Url.Action("Details",
new { page, pageSize = @Model.Vehicles.PageSize }))
Showing @Model.Vehicles.FirstItemOnPage to @Model.Vehicles.LastItemOnPage
of @Model.Vehicles.TotalItemCount Vehicles
答案 0 :(得分：0)
在尝试其他事情时刚刚发生了解决方案。当前的解决方案允许每个月在其自己的页面上。它可能不是最好的解决方案，但它确实有效。
为群组数据添加了自定义类：
public class Group<T, TK>
{
public TK Key;
public IEnumerable<T> Values;
}
更新了ViewModel：
public PagedList<Group<Vehicle, string>> VehiclesGroup { get; set; }
更新详情控制器：
public ActionResult Details(int? id, string searchString, string currentFilter, int? page, int? item)
{
var customer = db.Customers.Find(id);
if (customer == null)
{
return HttpNotFound();
}
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
var vehicles = from f in db.Vehicles
where f.CustomerId == customer.Id
select f;
var vehiclesList = vehicles.OrderBy(m => m.MonthId).ThenBy(r => r.Register).ToList();
var groupedVehicles = from v in vehiclesList
group v by v.MonthName
into g
select new Group<Vehicle, string> { Key = g.Key, Values = g };
if (searchString != null)
{
page = 1;
}
else
{
searchString = currentFilter;
}
ViewBag.CurrentFilter = searchString;
var pageSize = vehicles.Count(v => v.MonthId <= 0);
if (pageSize == 0)
{
pageSize = 1;
}
var pageNumber = (page ?? 1);
if (!string.IsNullOrEmpty(searchString))
{
vehicles = vehicles.Where(r => r.Register.Contains(searchString.ToUpper())
|| r.License.Contains(searchString.ToUpper())
|| r.Make.Contains(searchString.ToUpper())
|| r.OwnerName.Contains(searchString.ToUpper())
|| r.Vin.Contains(searchString.ToUpper())
|| r.MonthName.Contains(searchString.ToUpper()));
vehiclesList = vehicles.ToList();
groupedVehicles = from v in vehiclesList
group v by v.MonthName
into g
select new Group<Vehicle, string> { Key = g.Key, Values = g };
}
var pagedList = new PagedList<Group<Vehicle, string>>(groupedVehicles, pageNumber, pageSize);
var viewModel = new CustomerVehicleViewModel()
{
VehiclesGroup = pagedList,
Customer = customer
};
return View(viewModel);
}
更新了视图：
@model Application.ViewModels.CustomerVehicleViewModel
@using PagedList.Mvc
<link href="~/Content/PagedList.css" rel="stylesheet" type="text/css" />
@{
ViewBag.Title = "Fleet Details";
if (TempData["Error"] != null)
{
ViewBag.Error = TempData["Error"];
}
}
<h2>@Model.Customer.Name</h2>
<div class="row">
<div class="col-md-12">
<div class="row">
<div class="col-md-6" style="margin-bottom: 1%">
@using (Html.BeginForm("Details", "Customers", FormMethod.Get))
{
@Html.ValidationSummary(true, "", new { @class = "text-danger" })
<div class="input-group">
<div class="input-group">
<span class="input-group-addon"><span class="glyphicon glyphicon-search"></span></span>
@Html.TextBox("searchString", ViewBag.CurrentFilter as string, null, new { @class = "form-control", placeholder = "Search", autofocus = "autofocus", style = "margin-right:1%" })
</div>
<div class="input-group-btn">
<input class="btn-warning btn" type="submit" value="search" />
@Html.ActionLink("Reset", null, null, null, new { @class = "btn btn-info", style = "margin-left: 5%" })
</div>
</div>
}
</div>
<div class="col-md-6">
<div class="btn-toolbar">
@Html.ActionLink("Add Vehicle", "Create", "Vehicles", new { id = Model.Customer.Id }, new { @class = "btn-success btn" })
@Html.ActionLink("Edit Customer", "Edit", new { id = Model.Customer.Id }, new { @class = "btn btn-primary" })
@Html.ActionLink("Delete Customer", "Delete", new { id = Model.Customer.Id }, new { @class = "btn-danger btn" })
@Html.ActionLink("Back to List", "Index", null, new { @class = "btn-default btn" })
@Html.ActionLink("BRN/ID", "ViewFile", "Customers", new { cid = Model.Customer.Id, id = Model.Customer.FileId }, new { @class = "btn-info btn", target = "_blank" })
</div>
</div>
</div>
</div>
</div>
@Html.ValidationMessage("", $"{ViewBag.Error}", new { @class = "text-danger" })
<hr />
@if (!Model.VehiclesGroup.Any())
{
<p>No Vehicles loaded</p>
<br />
}
else
{
<table class="table table-hover table-bordered" id="table">
<thead>
<tr>
<th>@Html.DisplayName("Owner")</th>
<th>@Html.DisplayName("License")</th>
<th>@Html.DisplayName("Make")</th>
<th>@Html.DisplayName("Register")</th>
<th>@Html.DisplayName("VIN")</th>
<th>@Html.DisplayName("Month")</th>
<th class="remove">
<button id="btnPrint" class="btn btn-warning"><span class="glyphicon glyphicon-print" aria-hidden="true"></span> Print Table</button>
</th>
</tr>
</thead>
<tbody>
@foreach (var item in Model.VehiclesGroup)
{
foreach (var i in item.Values)
{
<tr>
<td>@Html.DisplayFor(modelItem => i.OwnerName)</td>
<td>@Html.DisplayFor(modelItem => i.License)</td>
<td>@Html.DisplayFor(modelItem => i.Make)</td>
<td>@Html.DisplayFor(modelItem => i.Register)</td>
<td>@Html.DisplayFor(modelItem => i.Vin)</td>
<td>@Html.DisplayFor(modelItem => i.MonthName)</td>
<td class="remove">
<div class="btn-toolbar">
@Html.ActionLink("Edit", "Edit", "Vehicles", new { id = i.VehicleId }, new { @class = "btn btn-primary" })
@Html.ActionLink("Details", "Details", "Vehicles", new { id = i.VehicleId }, new { @class = "btn btn-default" })
@Html.ActionLink("Delete", "Delete", "Vehicles", new { id = i.VehicleId }, new { @class = "btn btn-danger" })
@Html.ActionLink("Scan", "ViewFile", "Vehicles", new { cId = i.CustomerId, id = i.VehicleId }, new { @class = "btn btn-info", target = "_blank" })
</div>
</td>
</tr>
}
<tr>
<td colspan="3">@item.Key</td>
<td colspan="3"></td>
</tr>
}
</tbody>
</table>
}
<br />
Page @(Model.VehiclesGroup.PageCount < Model.VehiclesGroup.PageNumber ? 0 : Model.VehiclesGroup.PageNumber) of @Model.VehiclesGroup.PageCount
@Html.PagedListPager(Model.VehiclesGroup, page => Url.Action("Details",
new
{
page,
currentFilter = ViewBag.CurrentFilter,
pageSize = @Model.VehiclesGroup.PageSize
}))
Total of @Model.VehiclesGroup.TotalItemCount Pages
更新了1月份/第1页的显示 Page 1
更新了2月/第2页的显示 Page 2
更新了第3页的显示 Page 3
希望它可以帮助某人，或者如果有人有更好的想法，请分享！
