将父视图的id传递给子视图并在控制器中使用它- ASP.asp.net MVC 5

Question

我在将父ID发送给子ID时遇到问题，即使我这样做，我也只想显示特定父的子数据。在我的代码中，List是孩子们。当我创建一个列表时，我已经重定向到Notes索引页(不同的控制器)和ID，但在所有列表中，我可以看到相同的笔记。我在NotesController中使用TempData来保持该ID。

列表控制器:

//Index
public ActionResult Index()
{
return View(db.Lists.ToList());
}
//Create
public ActionResult Create()
{
return View();
}
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create(ListViewModel lists)
{
if (ModelState.IsValid)
{
Lists list = new Lists();
list.CreationDate = DateTime.Now;
list.ListName = lists.ListName;
db.Lists.Add(list);
db.SaveChanges();
int? idFromView = list.Id;
return RedirectToAction("Index", "NotesInLists", new { id = idFromView });
}
return View(lists);
}

指出控制器:

//Index
public ActionResult Index(int? id)
{
TempData["idFromView"] = id;
return View(db.NotesInLists.ToList());
}
//Create
public ActionResult CreateWithtext()
{
return View();
}
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult CreateWithtext(NoteTagViewModel notesInList)
{
if (ModelState.IsValid)
{
List<string> TagsList = notesInList.TagsList.Split(',').ToList();
NotesInList note = new NotesInList();
int tempDataId = (int)TempData["idFromView"];
note.CreationDate = DateTime.Now;
note.ListName = notesInList.ListName;
note.TextDescription = notesInList.TextDescription;
note.listID = tempDataId;    
db.NotesInLists.Add(note);
db.SaveChanges();
//saving tags
foreach (var item in TagsList)
{
Tags tag = new Tags();
tag.CreationDate = DateTime.Now;
tag.TagName = item;
tag.Note_Id = note.Id;
db.Tags.Add(tag);
}
db.SaveChanges();
return RedirectToAction("Index", new { id = tempDataId });
}
return View(notesInList);
}

在这里，在这个NotesController，我也保存标签，它工作得很好，但主要问题是与列表。也使用ViewModels，但这是不关心我现在。如果我尝试使用

访问List

Lists list = new List();

我仍然不能检查和比较那个ID和那个List ID，它抛出一个异常。

列表模式:

namespace NoteBlocks.Models
{
public class Lists
{
public int Id { get; set; }
[Required]
[Display(Name = "List Name")]
public string ListName { get; set; }
[Display(Name = "Creation Date")]
public DateTime? CreationDate { get; set; }
[Display(Name = "Last Updated")]
public DateTime? UpdateDate { get; set; }
}
}

列表视图模型:

namespace NoteBlocks.ViewModels
{
public class ListViewModel
{
public int Id { get; set; }
[Required]
[Display(Name = "List Name")]
public string ListName { get; set; }
[Display(Name = "Creation Date")]
public DateTime? CreationDate { get; set; }
[Display(Name = "Last Updated")]
public DateTime? UpdateDate { get; set; }
}
}

指出模型:

namespace NoteBlocks.Models
{
public class NotesInList
{
public int Id { get; set; }
[Required]
[Display(Name = "List Name")]
public string ListName { get; set; }
[DataType(DataType.Date)]
[Display(Name = "Creation Date")]
public DateTime? CreationDate { get; set; }
[DataType(DataType.Date)]
[Display(Name = "Last Updated")]
public DateTime? UpdateDate { get; set; }
public string customFile { get; set; }
[Display(Name = "Enter Note Content")]
public string TextDescription { get; set; }
public Lists List { get; set; }
public int listID { get; set; }
}
}

Notes视图模型:

namespace NoteBlocks.Models
{
public class NoteTagViewModel
{
public int NoteId { get; set; }
[Required]
[Display(Name = "List Name")]
public string ListName { get; set; }
[DataType(DataType.Date)]
[Display(Name = "Creation Date")]
public DateTime? CreationDate { get; set; }
[DataType(DataType.Date)]
[Display(Name = "Last Updated")]
public DateTime? UpdateDate { get; set; }
public string customFile { get; set; }
[Display(Name = "Enter Note Content")]
public string TextDescription { get; set; }
//multiple tags
public string TagsList { get; set; }
public Lists List { get; set; }
public int ListId { get; set; }
}
}

创建了一个外键，但是不工作。

HTML - List Index

@model IEnumerable<NoteBlocks.Models.Lists>
@{
ViewBag.Title = "List";
//ViewBag.Id = model.Lists.Id;
}
<h2>List</h2>
<p>
@Html.ActionLink("  Create New List", "Create")
</p>
<table class="table">
<tr>
<th>
@Html.DisplayNameFor(model => model.ListName)
</th>
<th>
@Html.DisplayNameFor(model => model.CreationDate)
</th>
<th>
@Html.DisplayNameFor(model => model.UpdateDate)
</th>
<th></th>
</tr>
@foreach (var item in Model) {
<tr>
<td>
//using ActionLink to open list of notes for that particular List
//and passing particular List ID from here if already created
@Html.ActionLink(item.ListName, "Index", "NotesInLists", new { id = item.Id }, null)
@*@TempData.Peek("tempDataId")*@
</td>
<td>
@Html.DisplayFor(modelItem => item.CreationDate)
</td>
<td>
@Html.DisplayFor(modelItem => item.UpdateDate)
</td>
<td>
@Html.ActionLink("Edit", "Edit", new { id=item.Id }) |
@Html.ActionLink("Details", "Details", new { id=item.Id }) |
@Html.ActionLink("Delete", "Delete", new { id=item.Id })
</td>
</tr>
}
</table>

HTML - List Create

@model NoteBlocks.Models.Lists
@{
ViewBag.Title = "Create";
}
<h2>Create</h2>
@using (Html.BeginForm()) 
{
@Html.AntiForgeryToken()

<div class="form-horizontal">
<h4>List</h4>
<hr />
@Html.ValidationSummary(true, "", new { @class = "text-danger" })
<div class="form-group">
@Html.LabelFor(model => model.ListName, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.ListName, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.ListName, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.CreationDate, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.CreationDate, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.CreationDate, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.UpdateDate, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.UpdateDate, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.UpdateDate, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<input type="submit" value="Create" class="btn btn-default" />
</div>
</div>
</div>
}
<div>
@Html.ActionLink("Back to List", "Index")
</div>

HTML - Notes索引

@model IEnumerable<NoteBlocks.Models.NotesInList>
@{
ViewBag.Title = "List Notes";
}
<h2>List Notes</h2>
<p id="buttonsInPTag">
<button type="button" class="btn btn-primary" id="addButton1"><span class="glyphicon glyphicon-plus">@Html.ActionLink("  Create Textual Note", "CreateWithtext")</span></button>
<button type="button" class="btn btn-primary" id="addButton2"><span class="glyphicon glyphicon-plus">@Html.ActionLink("  Create Note from Document", "CreateWithDoc")</span></button>
<button type="button" class="btn btn-primary" id="addButton3"><span class="glyphicon glyphicon-plus">@Html.ActionLink("  Create Image Note", "CreateWithImage")</span></button>
<button type="button" class="btn btn-primary" id="addButton4"><span class="glyphicon glyphicon-plus">@Html.ActionLink("  Create Audio / Video Note", "CreateWithMedia")</span></button>
</p>
<table class="table">
<tr>
<th>
@Html.DisplayNameFor(model => model.ListName)
</th>
<th>
@Html.DisplayNameFor(model => model.CreationDate)
</th>
<th>
@Html.DisplayNameFor(model => model.UpdateDate)
</th>
<th></th>
</tr>
@foreach (var item in Model)
{
<tr>
<td>
@Html.DisplayFor(modelItem => item.ListName)
</td>
<td>
@Html.DisplayFor(modelItem => item.CreationDate)
</td>
<td>
@Html.DisplayFor(modelItem => item.UpdateDate)
</td>
<td>
@Html.ActionLink("Edit", "Edit", new { id = item.Id }) |
@Html.ActionLink("Details", "Details", new { id = item.Id }) |
@Html.ActionLink("Delete", "Delete", new { id = item.Id })
</td>
</tr>
}
</table>

HTML - Notes CreateWithText

@model NoteBlocks.Models.NoteTagViewModel
@{
ViewBag.Title = "Create Note with Text";
}
<h2>Create Note with Text</h2>
@using (Html.BeginForm("CreateWithText", "NotesInLists", FormMethod.Post))
{
@Html.AntiForgeryToken()
<div class="form-horizontal">
<hr />
@Html.ValidationSummary(true, "", new { @class = "text-danger" })
<div class="form-group">
@Html.LabelFor(model => model.ListName, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.ListName, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.ListName, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.TextDescription, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
<textarea cols="50" rows="12" class=form-control id="TextDescription" name="TextDescription"></textarea>
@Html.ValidationMessageFor(model => model.TextDescription, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.Label("Tags", htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
<input type="text" id="tagsField" name="tagsField" class=form-control data-role="tagsinput" />
<input type="hidden" name="TagsList" id="TagsList" />
</div>
</div>

<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<input type="submit" value="Create" class="btn btn-default" />
</div>
</div>
</div>
}
<div>
@Html.ActionLink("Back to List", "Index")
</div>
@section scripts
{
<script>
$(document.body).on('focusout', '.bootstrap-tagsinput input', () => {
let array = $('#tagsField').tagsinput('items');
$("#TagsList").val(array);
})
</script>
}

我被这一点困住了。请指导。注:使用代码优先的方法。

Answer 1

没有过滤器应用于在notes控制器的Index操作中获取notes的查询。

我想添加where方法;

其中x (x =祝辞。listID == id)

可以解决你的问题。

//Index
public ActionResult Index(int? id)
{
TempData["idFromView"] = id;
return View(db.NotesInLists/*.Where(x=>x.listID == id)*/.ToList());
}