Question

spring mvc整合datatable实现分页为什么不分页

Answer 1

　MVC项目中有的时候List的条数比较多，需要分页显示，可以用如下的办法：
　　1、写一个简单PaginatedList 辅助类：
public class PaginatedList<T> : List<T> {
public int PageIndex { get; private set; }
public int PageSize { get; private set; }
public int TotalCount { get; private set; }
public int TotalPages { get; private set; }
public PaginatedList(IQueryable<T> source, int pageIndex, int pageSize) {
PageIndex = pageIndex;
PageSize = pageSize;
TotalCount = source.Count();
TotalPages = (int) Math.Ceiling(TotalCount / (double)PageSize);
this.AddRange(source.Skip(PageIndex * PageSize).Take(PageSize));
}
public bool HasPreviousPage {
get {
return (PageIndex > 0);
}
}
public bool HasNextPage {
get {
return (PageIndex+1 < TotalPages);
}
}
}
　　　2、Controller中使用这个PaginatedList 类来返回View：
public ActionResult Index(int? page) {
const int pageSize = 10;
var upcomingDinners = dinnerRepository.FindUpcomingDinners();
var paginatedDinners = new PaginatedList<Dinner>(upcomingDinners, page ?? 0,pageSize);
return View(paginatedDinners);
}
　　　　3、View中实现导航链接的Code如下：
　<% if (Model.HasPreviousPage) { %>
<%= Html.RouteLink("<<<", "UpcomingDinners", new { page =
(Model.PageIndex-1) }) %>
<% } %>
<% if (Model.HasNextPage) { %>
<%= Html.RouteLink(">>>", "UpcomingDinners", new { page = (Model.PageIndex +
1) }) %>
<% } %>