ASP MVC 3中一个视图中的两个模型

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最佳答案

Create a parent view model that contains both models.

public class MainPageModel{
public Model1 Model1{get; set;}
public Model2 Model2{get; set;}
}

This way you can add additional models at a later date with very minimum effort.

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You can use the presentation pattern http://martinfowler.com/eaaDev/PresentationModel.html

This presentation "View" model can contain both Person and Order, this new
class can be the model your view references.

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If you are a fan of having very flat models, just to support the view, you should create a model specific to this particular view...

public class EditViewModel
public int PersonID { get; set; }
public string PersonName { get; set; }
public int OrderID { get; set; }
public int TotalSum { get; set; }
}

Many people use AutoMapper to map from their domain objects to their flat views.

The idea of the view model is that it just supports the view - nothing else. You have one per view to ensure that it only contains what is required for that view - not loads of properties that you want for other views.

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Another way that is never talked about is Create a view in MSSQL with all the data you want to present. Then use LINQ to SQL or whatever to map it. In your controller return it to the view. Done.

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Another option which doesn't have the need to create a custom Model is to use a Tuple<>.

@model Tuple<Person,Order>

It's not as clean as creating a new class which contains both, as per Andi's answer, but it is viable.

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To use the tuple you need to do the following, in the view change the model to:

@model Tuple<Person,Order>

to use @html methods you need to do the following i.e:

@Html.DisplayNameFor(tuple => tuple.Item1.PersonId)

or

@Html.ActionLink("Edit", "Edit", new { id=Model.Item1.Id }) |

Item1 indicates the first parameter passed to the Tuple method and you can use Item2 to access the second model and so on.

in your controller you need to create a variable of type Tuple and then pass it to the view:

    public ActionResult Details(int id = 0)
{
Person person = db.Persons.Find(id);
if (person == null)
{
return HttpNotFound();
}
var tuple = new Tuple<Person, Order>(person,new Order());


return View(tuple);
}

Another example : Multiple models in a view

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you can't declare two model on one view, try to use Html.Action("Person", "[YourController]") & Html.Action("Order", "[YourController]").

Good luck.

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Just create a single view Model with all the needed information in it, normaly what I do is create a model for every view so I can be specific on every view, either that or make a parent model and inherit it. OR make a model which includes both the views.

Personally I would just add them into one model but thats the way I do it:

public class xViewModel
{
public int PersonID { get; set; }
public string PersonName { get; set; }
public int OrderID { get; set; }
public int TotalSum { get; set; }
}


@model project.Models.Home.xViewModel


@using(Html.BeginForm())
{
@Html.EditorFor(x => x.PersonID)
@Html.EditorFor(x => x.PersonName)
@Html.EditorFor(x => x.OrderID)
@Html.EditorFor(x => x.TotalSum)
}

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In fact there is a way to use two or more models on one view without wrapping them in a class that contains both.

Using Employee as an example model:

@model Employee

Is actually treated like.

@{ var Model = ViewBag.model as Employee; }

So the View(employee) method is setting your model to the ViewBag and then the ViewEngine is casting it.

This means that,

ViewBag.departments = GetListOfDepartments();
return View(employee);

Can be used like,

            @model  Employee
@{
var DepartmentModel = ViewBag.departments as List<Department>;
}

Essentially, you can use whatever is in your ViewBag as a "Model" because that's how it works anyway. I'm not saying that this is architecturally ideal, but it is possible.

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I hope you find it helpfull !!

i use ViewBag For Project and Model for task so in this way i am using two model in single view and in controller i defined viewbag's value or data

List<tblproject> Plist = new List<tblproject>();
Plist = ps.getmanagerproject(c, id);


ViewBag.projectList = Plist.Select(x => new SelectListItem
{
Value = x.ProjectId.ToString(),
Text = x.Title
});

and in view tbltask and projectlist are my two diff models

@{

IEnumerable<SelectListItem> plist = ViewBag.projectList;

} @model List

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ok, everyone is making sense and I took all the pieces and put them here to help newbies like myself that need beginning to end explanation.

You make your big class that holds 2 classes, as per @Andrew's answer.

public class teamBoards{
public Boards Boards{get; set;}
public Team Team{get; set;}
}

Then in your controller you fill the 2 models. Sometimes you only need to fill one. Then in the return, you reference the big model and it will take the 2 inside with it to the View.

            TeamBoards teamBoards = new TeamBoards();




teamBoards.Boards = (from b in db.Boards
where b.TeamId == id
select b).ToList();
teamBoards.Team = (from t in db.Teams
where t.TeamId == id
select t).FirstOrDefault();


return View(teamBoards);

At the top of the View

@model yourNamespace.Models.teamBoards

Then load your inputs or displays referencing the big Models contents:

 @Html.EditorFor(m => Model.Board.yourField)
@Html.ValidationMessageFor(m => Model.Board.yourField, "", new { @class = "text-danger-yellow" })


@Html.EditorFor(m => Model.Team.yourField)
@Html.ValidationMessageFor(m => Model.Team.yourField, "", new { @class = "text-danger-yellow" })

And. . . .back at the ranch, when the Post comes in, reference the Big Class:

 public ActionResult ContactNewspaper(teamBoards teamboards)

and make use of what the model(s) returned:

string yourVariable = teamboards.Team.yourField;

Probably have some DataAnnotation Validation stuff in the class and probably put if(ModelState.IsValid) at the top of the save/edit block. . .

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Beside of one view model in asp.net you can also make multiple partial views and assign different model view to every view, for example:

   @{
Layout = null;
}


@model Person;


<input type="text" asp-for="PersonID" />
<input type="text" asp-for="PersonName" />

then another partial view Model for order model

    @{
Layout = null;
}


@model Order;


<input type="text" asp-for="OrderID" />
<input type="text" asp-for="TotalSum" />

then in your main view load both partial view by

<partial name="PersonPartialView" />
<partial name="OrderPartialView" />