【发布时间】:2021-12-07 13:04:14
【问题描述】:
我使用link 构建了 ASP.NET Core Web 应用程序来帮助搜索/排序/分页。我有链接中建议的 PaginatedList.cs 类来帮助分页,如
public class PaginatedList<T> : List<T>
{
public int PageIndex { get; private set; }
public int TotalPages { get; private set; }
public PaginatedList(List<T> items, int count, int pageIndex, int pageSize)
{
PageIndex = pageIndex;
TotalPages = (int)Math.Ceiling(count / (double)pageSize);
this.AddRange(items);
}
public bool HasPreviousPage
{
get
{
return (PageIndex > 1);
}}
public bool HasNextPage
{
get
{
return (PageIndex < TotalPages);
}}
public static async Task<PaginatedList<T>> CreateAsync(IQueryable<T> source, int pageIndex, int pageSize)
{
var count = await source.CountAsync();
var items = await source.Skip((pageIndex - 1) * pageSize).Take(pageSize).ToListAsync();
return new PaginatedList<T>(items, count, pageIndex, pageSize);
}
}
我有一个使用多个模型的视图,所以创建了一个如下所示的集合模型
public class CustomerInventoryCollectionDataModel
{
public Customer CustomerData { get; set; }
public List<Inventory> Inventorys { get; set; }
}
所以我想要索引视图上的库存表的分页。因此,正如链接中所建议的那样,我在视图上使用了 PaginatedList,例如
@model PaginatedList<JAXApp.Models.CustomerInventoryCollectionDataModel>
<div>
<h4>Customer</h4>
<hr />
<dl class="row">
<dt class="col-sm-2">
Customer Number
</dt>
<dd class="col-sm-10">
@Html.DisplayFor(model => model.CustomerData.CustomerNumber)
</dd>
</d1>
<table class="table">
<thead>...</thead>
<tbody>
@foreach (var item in Model.Inventorys)
{
当我尝试在上面的视图中访问 CustomerData 和 Inventorys 时会引发错误
'PaginatedList<CustomerInventoryCollectionDataModel>' does not contain a definition for 'Inventorys' and no accessible extension method 'Inventorys' accepting a first argument of type 'PaginatedList<CustomerInventoryCollectionDataModel>' could be found (are you missing a using directive or an assembly reference?)
PaginatedList<CustomerInventoryCollectionDataModel>' does not contain a definition for 'CustomerData' and no accessible extension method 'CustomerData' accepting a first argument of type 'PaginatedList<CustomerInventoryCollectionDataModel>' could be found (are you missing a using directive or an assembly reference?)
如何按照链接中的建议对库存表进行分页
【问题讨论】:
-
您的模型是一个集合。 PaginatedList 没有属性 Inventorys。您的集合/模型中的项目确实具有该属性。循环遍历您的模型并使用 item.CustomerData.CustomerNumber
-
@lordvlad30 我正在按照链接构建它,我对 Web 应用程序开发非常陌生。你能帮我建议是否需要更改 PaginatedList 类吗?
标签: asp.net asp.net-mvc entity-framework asp.net-core entity-framework-core