将 Id 从一个控制器传递到另一个控制器
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【中文标题】将 Id 从一个控制器传递到另一个控制器【英文标题】：Passing an Id from one controller to another 【发布时间】：2014-04-30 13:50:12 【问题描述】：您好，我的 mvc 4 应用程序中有这个。一旦您向系统添加了一个节日，我想通过传递一个 id 向该节日添加一个事件。谁能帮我？这是我的控制器以及我的视图、视图模型和模型。我收到一个错误：
参数字典包含“MyFestival”中方法“System.Web.Mvc.ActionResult Create2(MyFestival.Models.EventsVM, Int32)”的不可为空类型“System.Int32”的参数“festID”的空条目。控制器.EventsController'。可选参数必须是引用类型、可空类型或声明为可选参数。
[HttpGet]
public ActionResult Create2(int festID)
EventsVM events = new EventsVM festivalID = festID ;
events.eType = db.EType.ToDictionary(p => p.ID, q => q.EType);
events.eType.Add(-1, "----- Add New Event Type -----");
events.eventsDate = DateTime.Now;
events.startTime = DateTime.Now;
events.endTime = DateTime.Now;
return View(events);
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create2(EventsVM model, int festID)
if (ModelState.IsValid != true)
if (model.selectedEType != -1)
//db.save stuff from create.
Events Newevent = new Events();
Newevent.EndTime = model.endTime;
Newevent.StartTime = model.startTime;
Newevent.EventsDate = model.eventsDate = DateTime.Now;
Newevent.EventsName = model.EventsName;
Newevent.EType = db.EType.Where(p => p.ID == model.selectedEType).Single();
Newevent.Location = model.Location;
if (Request.Files.Count != 0)
string fileName = Guid.NewGuid().ToString();
string serverPath = Server.MapPath("~\\Content\\EventPicture");
Bitmap newImage = new Bitmap(Request.Files[0].InputStream);
newImage.Save(serverPath + "\\" + fileName + ".jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
model.eventsImage = "Content/EventPicture/" + fileName + ".jpg";
Newevent.FestivalID = model.festivalID = festID;
db.Events.Add(Newevent);
db.SaveChanges();
//Change the model.festivalID to Newevent.FestivalID
return RedirectToAction("Details", "Festival", new id = Newevent.FestivalID );
else
db.Events.Add(Newevent);
db.SaveChanges();
//Change the model.festivalID to Newevent.FestivalID
return RedirectToAction("Details", "Festival", new id = Newevent.FestivalID );
ModelState.AddModelError("", "No Event Type Picked");
model.eType = db.EType.ToDictionary(p => p.ID, q => q.EType);
model.eType.Add(-1, "----- Add New Event Type -----");
model.eventsDate = DateTime.Now;
model.startTime = DateTime.Now;
model.endTime = DateTime.Now;
return View(model);
这是我的模型
public class Events
[Required]
public int ID get; set;
[Required]
public int FestivalID get; set;
[Required(ErrorMessage="Please input the Event Name.")]
[Display(Name = "Event name"), StringLength(100)]
[DisplayFormat(ApplyFormatInEditMode = true)]
public string EventsName get; set;
[Display(Name = "Event date")/*, DataType(DataType.Date)*/]
[DisplayFormat(DataFormatString = "0:dd-MMM-yyyy", ApplyFormatInEditMode = true)]
[Required(ErrorMessage = "Please input the Event's Date.")]
public DateTime EventsDate get; set;
[Display(Name = "Start Time"), DataType(DataType.Time)]
[DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "0:hh:mm tt")]
[Required(ErrorMessage = "Please input the Event's Start Time.")]
public DateTime StartTime get; set;
[Display(Name = "End Time"), DataType(DataType.Time)]
[DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "0:hh:mm tt")]
[Required(ErrorMessage = "Please input the Event's end time.")]
public DateTime EndTime get; set;
[Required]
[Display(Name = "Location")]
[DisplayFormat(ApplyFormatInEditMode = true)]
public string Location get; set;
[Required]
[Display(Name = "Event Type")]
[DisplayFormat(ApplyFormatInEditMode = true)]
public virtual EventType EType get; set;
[Display(Name = "Event Logo")]
[DataType(DataType.Upload)]
[DisplayFormat(ApplyFormatInEditMode = true)]
public string EventLogo get; set;
视图模型
public class EventsVM
[Required]
[Display(Name = "Event Type")]
[DisplayFormat(ApplyFormatInEditMode = true)]
public Dictionary<int, string> eType get; set;
public int selectedEType get; set;
[Required]
public int ID get; set;
[Required]
public int festivalID get; set;
[Required]
[Display(Name = "Event Name"), StringLength(100)]
[DisplayFormat(ApplyFormatInEditMode = true)]
public string EventsName get; set;
[Required]
[Display(Name = "Event Date")/*, DataType(DataType.Date)*/]
[DisplayFormat(DataFormatString = "0:dd-MM-yyyy", ApplyFormatInEditMode = true)]
public DateTime eventsDate get; set;
[Display(Name = "Start Time"), DataType(DataType.Time)]
[DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "0:hh:mm tt")]
[Required(ErrorMessage = "Please input the Event's Start Time.")]
public DateTime startTime get; set;
[Display(Name = "End Time"), DataType(DataType.Time)]
[DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "0:hh:mm tt")]
[Required(ErrorMessage = "Please input the Event's end time.")]
public DateTime endTime get; set;
[Required]
[Display(Name = "Location")]
[DisplayFormat(ApplyFormatInEditMode = true)]
public string Location get; set;
public HttpPostedFileWrapper imageFile get; set;
[Display(Name="Event Image")]
public string eventsImage get; set;
这是我的观点
@model MyFestival.Models.EventsVM
@
ViewBag.Title = "Create Event";
Layout = "~/Views/Shared/Festival.cshtml";
<h2>Add an event for #@Model.festivalID</h2>
@using (Html.BeginForm())
@*@using (Html.BeginForm("Create2", "Events", FormMethod.Post, new enctype="multipart/form-data"))
*@
@Html.AntiForgeryToken()
<div class="form-horizontal">
<hr />
@Html.ValidationSummary(true)
<div class="form-group">
@Html.LabelFor(model => model.EventsName, new @class = "control-label col-md-2" )
<div class="col-md-10">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-pencil"></i></span>
<input class="form-control" id="EventsName" required="required" style="width: 210px" name="EventsName" placeholder="Please enter event name" />
@*@Html.EditorFor(model => model.EventsName, new @class = "form-control", @style = "width:250px" )*@
</div>
@Html.ValidationMessageFor(model => model.EventsName, null, new @style = "color:red;" )
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.eventsDate, new @class = "control-label col-md-2" )
<div class="col-md-10">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-calendar"></i></span>
@Html.TextBoxFor(model => model.eventsDate, new @class = "form-control datepicker", @style = "width:210px" )
</div>
@Html.ValidationMessageFor(model => model.eventsDate, null, new @style = "color:red;" )
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.startTime, new @class = "control-label col-md-2" )
<div class="col-md-10">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-time"></i></span>
<input id="startTime" name="startTime" required="required" class="form-control bootstrap-timepicker" style="width: 210px" />
@*@Html.EditorFor(model => model.startTime, new @class = "form-control", @style = "width:250px" )*@
</div>
@*@Html.EditorFor(model => model.startTime, new @class = "form-control" )*@
@Html.ValidationMessageFor(model => model.startTime, null, new @style = "color:red;" )
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.endTime, new @class = "control-label col-md-2" )
<div class="col-md-10">
<div class='input-group date' id='datetimepicker4'>
<span class="input-group-addon"><i class="glyphicon glyphicon-time"></i></span>
<input name="endTime" id="endTime" type='text' class="form-control bootstrap-timepicker" style="width: 210px" />
@*@Html.TextBoxFor(model => model.startDate, new @class = "form-control datepicker", @style = "width:210px" )*@
</div>
@Html.ValidationMessageFor(model => model.endTime, null, new @style = "color:red;" )
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.eType, new @class = "control-label col-md-2" )
<div class="col-md-10">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-tag"></i></span>
@Html.DropDownListFor(p => p.selectedEType, Model.eType.Select(p => new SelectListItem() Text = p.Value.ToString(), Value = p.Key.ToString(), Selected = false ), new @class = "form-control", @style = "width:210px", @onchange = "checkaddnew();" )
</div>
@Html.ValidationMessageFor(model => model.eType, null, new @style = "color:red;" )
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Location, new @class = "control-label col-md-2" )
<div class="col-md-10">
@Html.TextAreaFor(model => model.Location, new @style = "width:300px;", @class = "form-control", @rows = "3" )
@Html.ValidationMessageFor(model => model.Location, null, new @style = "color:red;" )
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.eventsImage, new @class = "control-label col-md-2" )
<div class="col-md-10">
<input name="imageFile" id="File" type="file" />
</div>
</div>
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<input type="submit" value="Create" class="btn btn-info" />
@Html.ActionLink("Back to List", "Index", "Festival", null, new @class = "btn btn-danger" )
</div>
</div>
</div>
@Html.Partial("CreateEventType", new MyFestival.Models.EventTypeVM())
@section Scripts
@Scripts.Render("~/bundles/jqueryval")
<script>
$(document).ready(function ()
$('#selectedEType').change(function ()
if ($(this).find(":selected").val() == -1)
$('#myModal').modal('show');
);
);
</script>
<script type="text/javascript">
function ajaxResponse(data)
alert("This Worked and the Data ID is: " + data.EventTypeID);
var newOption = "<option value='" + data.EventTypeID + "'>" + data.Name + "</option>";
$('#selectedEType').append(newOption);
$('#myModal').modal('hide');
$("#selectedEType option[value='" + data.EventTypeID + "']").attr("selected", "selected");
;
</script>
<script type="text/javascript">
$(document).ready(function ()
$("#eventsDate").datepicker('setDate', '+1',dateFormat: "dd/mm/yy").on('changeDate', function (ev)
$(this).blur();
$(this).datepicker('hide');
);
);
</script>
<script type="text/javascript">
$('#startTime').timepicker(
minuteStep: 5,
showInputs: false,
disableFocus: true
);
</script>
<script type="text/javascript">
$('#endTime').timepicker(
minuteStep: 5,
showInputs: false,
disableFocus: true
);
</script>
【问题讨论】：
您想通过链接、提交时还是使用 javascript 发送它？ 当您单击创建时，我正在尝试将 id 传递到事件表中。 【参考方案1】：在您的 GET 控制器中，您正在模型中设置节日 ID：
EventsVM events = new EventsVM festivalID = festID ;
所以在您的视图中某处（我的偏好将在您的 ValidationSummary 下方），添加
@Html.HiddenFor(m => m.festivalID)
那么您的 POST 控制器中不需要第二个参数：
public ActionResult Create2(EventsVM model)
因为模型包含节日ID，通过model.festivalID。
【讨论】：
id 是通过@Jonesy 传递的。但我仍然收到一个错误：保存不为其关系公开外键属性的实体时发生错误。 EntityEntries 属性将返回 null，因为无法将单个实体标识为异常源。通过在实体类型中公开外键属性，可以更轻松地处理保存时的异常。 这听起来像是一个不同的问题。尝试查看this answer，如果您无法弄清楚，请尝试在 SO 上发布一个新问题以上是关于将 Id 从一个控制器传递到另一个控制器的主要内容，如果未能解决你的问题，请参考以下文章
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