Question

我有一个MVC，我可以在数据库中搜索不同的值。我也可以按照升序和降序排列列表，例如奖品和字母。但是让我说我在数据库中总共有10行。然后我进行搜索，得出两个结果。如果我然后尝试对这两个进行排序，它会再次重新加载所有10行。

如果没有重新加载整个列表，我怎样才能在搜索后进行排序？

我的控制器：

public ActionResult Index(string searchBy, string search, string sortOrder)
{

    ViewBag.NameSortParm = String.IsNullOrEmpty(sortOrder) ? "name_desc" : "";
    ViewBag.TextSortParm = String.IsNullOrEmpty(sortOrder) ? "text_desc" : "";
    ViewBag.PriceSortParm = sortOrder == "Price" ? "price_desc" : "Price";
    ViewBag.CubicMeterSortParm = sortOrder == "CubicMeter" ? "cubicMeter_desc" : "CubicMeter";
    ViewBag.PricePerCubicSortParm = sortOrder == "PricePerCubic" ? "pricePerCubic_desc" : "PricePerCubic";

    var text = from s in db.LearningNumbers select s;

    switch (sortOrder)
    {
        case "name_desc":
            text = text.OrderByDescending(s => s.Name);
            break;
        case "text_desc":
            text = text.OrderByDescending(s => s.Note);
            break;
        case "Price":
            text = text.OrderBy(s => s.Price);
            break;
        case "price_desc":
            text = text.OrderByDescending(s => s.Price);
            break;
        case "CubicMeter":
            text = text.OrderBy(s => s.CubicMeter);
            break;
        case "cubicMeter_desc":
            text = text.OrderByDescending(s => s.CubicMeter);
            break;
        case "PricePerCubic":
            text = text.OrderBy(s => s.PricePerCubic);
            break;
        case "pricePerCubic_desc":
            text = text.OrderByDescending(s => s.PricePerCubic);
            break;
    }

    if (!String.IsNullOrEmpty(search))
    {
        if (searchBy == "Tekst")
        {
            text = text.Where(x => x.Note.Contains(search) || search == null);
        }
        else
        {
            text = text.Where(x => x.Name.Contains(search) || search == null); 
        }
    }

    return View(text.ToList());
}

我的观点：

@using (Html.BeginForm("Index", "Home", FormMethod.Get))
{
    @Html.RadioButton("searchBy", "Navn", true) <text>Navn</text>
    @Html.RadioButton("searchBy", "Tekst") <text>Tekst</text><br />
    @Html.TextBox("search")<input class="btn btn-primary" style="margin:0 10px;" type="submit" value="Søg" />
}

<div class="col-md-12 table" style="display:table; margin:45px 0 25px 0;">
    <div class="col-md-2">
        @*<b>Tekst</b><br />*@
        <h4>@Html.ActionLink("Navn", "Index", new { sortOrder = ViewBag.NameSortParm })</h4>
    </div>
    <div class="col-md-2">
        @*<b>Tekst</b><br />*@
        <h4>
            @Html.ActionLink("Tekst", "Index", new { sortOrder = ViewBag.TextSortParm })
        </h4>
    </div>
    <div class="col-md-2">
        @*<b>Kostpris med tillæg</b><br />*@
        <h4>
            @Html.ActionLink("Kostpris med tillæg", "Index", new { sortOrder = ViewBag.PriceSortParm })
        </h4>
    </div>
    <div class="col-md-2">
        @*<b>Brutto m2</b><br />*@
        <h4>
            @Html.ActionLink("Brutto m2", "Index", new { sortOrder = ViewBag.CubicMeterSortParm })
        </h4>
    </div>
    <div class="col-md-2">
        @*<b>Kostpris pr m2 bygning</b><br />*@
        <h4>
            @Html.ActionLink("Kostpris pr m2 bygning", "Index", new { sortOrder = ViewBag.PricePerCubicSortParm })
        </h4>
    </div>
</div>

@if (Model.Count() == 0)
{
    <h3>Beklager! Vi fandt desværre ingen resultater med dine søgekriterier.</h3>
    <p>Prøv venligst igen.</p>
}
else
{
    foreach (var item in Model)
    {

        <div class="col-md-12 table" style="display: table; margin: 0 0 0 0; ">
            <div class="col-md-2">
                <p><b>@Html.DisplayFor(modelItem => item.Name)</b></p>
            </div>
            <div class="col-md-2">
                <p>@Html.DisplayFor(modelItem => item.Note)</p>
            </div>
            <div class="col-md-2">
                <p>@Html.DisplayFor(modelItem => item.Price)</p>
            </div>
            <div class="col-md-2">
                <p>@Html.DisplayFor(modelItem => item.CubicMeter)</p>
            </div>
            <div class="col-md-2">
                <p>@Html.DisplayFor(modelItem => item.PricePerCubic)</p>
            </div>

        </div>
        <hr />

    }
}

Answer 1

以上评论有它。

在功能结束之前不要返回视图。创建集合并将其保存到本地变量。

然后在该局部变量上调用您的order by子句。

的伪代码：

var results = search();


If (orderBy)
{
    Results = results.orderBy(X);
}

return view(Results);

执行搜索后排序

1 个答案: