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PaginatedList.cs
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PaginatedList.cs
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//分頁
using Microsoft.EntityFrameworkCore;
namespace ContosoUniversityNet6 {
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 => PageIndex > 1;
public bool HasNextPage => 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);
}
}
}