PagedList在第二页上丢失了搜索过滤器

Question

我正在使用http://www.asp.net/mvc/tutorials/getting-started-with-ef-using-mvc/sorting-filtering-and-paging-with-the中的示例实现一个简单的分页列表索引-entity框架式-AN-ASP净MVC应用程序

我的问题是,当我转到第二页时,搜索字符串"丢失",因此我显示了所有记录,而不是过滤的结果集.

我的index.cshtml:

@using (Html.BeginForm("Index", "", FormMethod.Get))
{
    <p>
        @Html.TextBox("searchString", ViewBag.currentFilter as string, new { @placeholder = "Search by title or author" })
        <input type="submit" value="Search" />
    </p>
}

@if (Model.PageCount > 1)
{ 
    @Html.PagedListPager( Model, page => Url.Action("Index", new { page }) )
}

我的控制器:

public ViewResult Index(string sortOrder, string currentFilter, string searchString, int? page)
    {
        ViewBag.TitleSortParm = sortOrder == "Title" ? "Title desc" : "Title";
        ViewBag.AuthorSortParm = sortOrder == "Author" ? "Author desc" : "Author";
        ViewBag.DateSortParm = sortOrder == "Date" ? "Date desc" : "Date";

        if (searchString != null)
        {
            page = 1;
        }
        else
        {
            searchString = currentFilter;

        }

        ViewBag.currentFilter = searchString;

        var Articles = from a in db.Articles
                       select a;
        if (!String.IsNullOrEmpty(searchString))
        {
            //page = 1;
            Insights = Articles.Where(s => s.Title.ToUpper().Contains(searchString.ToUpper())
                               || s.Author.ToUpper().Contains(searchString.ToUpper()));
        }

        switch (sortOrder)
        {
            case "Author":
                Insights = Articles.OrderBy(s => s.Author);
                break;
            case "Author desc":
                Insights = Articles.OrderByDescending(s => s.Author);
                break;
            case "Title":
                Insights = Articles.OrderBy(s => s.Title);
                break;
            case "Title desc":
                Insights = Articles.OrderByDescending(s => s.Title);
                break;
            case "Date":
                Insights = Articles.OrderBy(s => s.DatePublished);
                break;
            default:
                Insights = Articles.OrderByDescending(s => s.DatePublished);
                break;
        }
        int pageSize = 3;
        int pageNumber = (page ?? 1);
        return View(Articles.ToPagedList(pageNumber, pageSize));

    }

当我以第2页为例时,我的所有变量sortOrder,currentFilter和searchString都是null.

罗比

Answer 1

问题是您的PagedList条目不包括您的排序顺序,也不包括您当前的过滤器.

除了按照Vasanth的建议添加ViewBag.CurrentSort之外,您还需要将PagedListPager更改为:

@Html.PagedListPager( Model, page => Url.Action("Index", new { page, currentFilter=ViewBag.CurrentFilter, sortOrder = ViewBag.sortOrder}) )