筛选器视图模型不起作用 ASP MVC

Question

我想用下拉列表过滤数据。为此，我创建了一个 视图模型 .我可以显示数据，但过滤器不起作用。当我选择一个国家/地区作为示例时，我的网格中列出了所有国家/地区。就像 HttpPost 在控制器中不起作用一样......

在我的视图中模型，我有以下脚本：

public class IndexGetViewModel
{
public List<missions_supportmission> missions_supportmission { get; set; }
public missions_supportmission missions { get; set; }
public  SelectList CountryList { get; set;  }
public string CountryIdSelected { get; set; }
}

在控制器中，我有以下脚本：

private Missions_devEntities db = new Missions_devEntities();
//
// GET: /Missions/Index
public ActionResult Index()
{
IndexGetViewModel model = new IndexGetViewModel();
//Affichage de geo division
model.CountryList = new SelectList(this.db.organization_hi_country.ToDictionary(b => b.country_id, b => b.name_en), "Key", "Value");
model.missions_supportmission = db.missions_supportmission.ToList() ;
return View(model);          
}
//POST: /Missions/Index
[HttpPost]
public ActionResult Index(IndexGetViewModel GetVM)
{
missions_supportmission missions = GetVM.missions;
//on cherche le le pays sélectionné dans la table missions
missions.organization_hi_country = this.db.organization_hi_country.Find(GetVM.CountryIdSelected);
//On affiche les pays dans la table missions
GetVM.missions_supportmission = db.missions_supportmission.Include(s => s.organization_hi_country).Where(s => s.organization_hi_country.country_id == GetVM.CountryIdSelected).ToList();
return View(GetVM);
}

在我看来，我有以下几点：

@using (Html.BeginForm("Index", "Missions", FormMethod.Get))
{
<section>
<h3>Localisation</h3>
<div class="form-group">
@Html.LabelFor(model => model.CountryIdSelected, "Country", htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.DropDownListFor(model => model.CountryIdSelected, Model.CountryList, htmlAttributes: new { onchange = "form.submit();", @class = "form-control" })
@Html.ValidationMessageFor(model => model.CountryIdSelected, "", new { @class = "text-danger" })
</div>
</div>
</section>
}
</nav>
<div id="content" class="container">
@using (Html.BeginForm("Index", "Missions", FormMethod.Get))
{
@Html.TextBox("searching")
<input type="submit" value="submit" />
}
<div>
<h2>Missions</h2>
<p>
@Html.ActionLink("Create New", "Create")
</p>
<table class="table table-bordered">
@using (Html.BeginForm("Index"))
{
<tr>
<th class="col-md-2">
Pays
</th>
<th class="col-md-1">
Date
</th>
<th class="col-md-2">
Personne
</th>
<th class="col-md-10">
Missions
</th>
<th class="col-md-10">
</th>
</tr>
}
@foreach (var item in Model.missions_supportmission)
{
<tr>
<td class="col-md-2">
@Html.DisplayFor(modelItem => item.organization_hi_country.name_en)
</td>
<td class="col-md-1">
@Html.DisplayFor(modelItem => item.asked_date)
</td>
<td class="col-md-2">
@Html.DisplayFor(modelItem => item.type_mission)
</td>
<td class="col-md-10">
Mission @Html.DisplayFor(modelItem => item.list_type.name_en) : @Html.DisplayFor(modelItem => item.list_nature.name_en)
<div>
<!-- les boutons d'actions -->
<a href="#@Html.DisplayFor(modelItem => item.id)" data-toggle="collapse" aria-expanded="false" aria-controls="@Html.DisplayFor(modelItem => item.id)">details</a>
</div>
<!-- le contenu masqué -->
<section id="@Html.DisplayFor(modelItem => item.id)" class="collapse">
<div class="well">
<p><em>Statut: </em>@Html.DisplayFor(modelItem => item.list_statut.name_en)</p>
<p><em>Durée: </em>@Html.DisplayFor(modelItem => item.duration) jours</p>
<p><em>Flexibilité: </em>@Html.DisplayFor(modelItem => item.list_flexibility.name_en) </p>
<p><em>Priorité: </em>@Html.DisplayFor(modelItem => item.list_priority.name_en) </p>
<p><em>Commentaires: </em>@Html.DisplayFor(modelItem => item.comments) </p>
</div>
</section>
</td>
<td class="col-md-10">
@Html.ActionLink("Edit", "Edit", new { /* id=item.PrimaryKey */ })
@Html.ActionLink("Details", "Details", new { id = item.id })
@Html.ActionLink("Delete", "Delete", new { /* id=item.PrimaryKey */ })
</td>
</tr>
}
</table>

Answer 1

您使用的是 FormMethod.Get 而不是 FormMethod.Post