ASP.NET MVC中部分视图的问题2

this is the master page :

这是母版页:

<%@ Master Language="C#" Inherits="System.Web.Mvc.ViewMasterPage" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title><asp:ContentPlaceHolder ID="TitleContent" runat="server" /></title>
    <link href="../../Content/Site.css" rel="stylesheet" type="text/css" />

    <asp:ContentPlaceHolder ID="header1" runat="server" />
</head>

<body>
<div class="page">
    <div id="header">
        <div id="title">
            <h1>My MVC Application</h1>
        </div>

        <div id="logindisplay">
            <% Html.RenderPartial("LogOnUserControl"); %>
        </div> 

        <div id="menucontainer">

            <ul id="menu">              
                <li><%= Html.ActionLink("Home", "Index", "Home")%></li>
                <li><%= Html.ActionLink("About", "About", "Home")%></li>
                <li><%= Html.ActionLink("Imoveis", "Index", "Categoria")%></li>
                <li><%= Html.ActionLink("Admin", "Index", "Admin")%></li>
                <li><%= Html.ActionLink("User", "Index", "User")%></li>
            </ul>

        </div>
    </div>
    <div id="left">

     <% Html.RenderPartial("~/Views/Imovel/Pesquisa.ascx"); %>   

    </div>
    <div id="main">
        <asp:ContentPlaceHolder ID="MainContent" runat="server" />

        <div id="footer">
        </div>
    </div>
</div>
</body>
</html>

Partial View

  <%= Html.DropDownList("categoria_id", (SelectList)ViewData["Categoriass"], "--Selecciona um--")%>



            <div class="editor-label">
            <%= Html.LabelFor(model => model.categoria_id) %>
        </div>
        <div class="editor-field">
            <%= Html.DropDownListFor(model => model.categoria_id, (SelectList)ViewData["Categorias"], "--Selecciona um--")%>

            <%= Html.ValidationMessageFor(model => model.categoria_id) %>
        </div>

This is the problem:

这就是问题:

    public ActionResult Index()
    {
        ViewData["Message"] = "Welcome to ASP.NET MVC!";

        **ViewData["Categoriass"] = new SelectList(catRepository.FindAllCategorias().AsEnumerable(), "id", "nome", 3);**



        return View();
    }

Since the partial view is in the master page, how do I get its model?

由于局部视图位于母版页中,我如何获取其模型?

4 个解决方案

#1

I think you should create an ActionFilter and apply it on your controllers.

我认为你应该创建一个ActionFilter并将其应用到你的控制器上。

Create an action filter like this

像这样创建一个动作过滤器

public class DataForMasterPageAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        //initiate your repository

           var catRepository = ...;

        //then create the viewdata like so

        filterContext.Controller.ViewData["Categorias"] = new SelectList(catRepository.FindAllCategorias().AsEnumerable(), "id", "nome", 3);
    }

}

Then apply it on the controller and it will be available for all actions as well. Like so;

然后将其应用于控制器,它也可用于所有操作。像这样;

[DataForMasterPage]
public class CategoriaController : Controller
{
      public ActionResult Index()
      {
            ViewData["Message"] = "Welcome to ASP.NET MVC!";
            return View();
      }
}

On the partial view you just call the ViewData as usual, no need to change anything

在局部视图上,您可以像往常一样调用ViewData,无需更改任何内容

<div class="editor-label">
        <%= Html.LabelFor(model => model.categoria_id) %>
    </div>
    <div class="editor-field">
        <%= Html.DropDownListFor(model => model.categoria_id, (SelectList)ViewData["Categorias"], "--Selecciona um--")%>

        <%= Html.ValidationMessageFor(model => model.categoria_id) %>
    </div>

Might have performance issues, but its one of the simplest ways to avoid setting the ViewData on every method.

可能存在性能问题,但它是避免在每个方法上设置ViewData的最简单方法之一。

#2

You can create base class for your controllers and set it during creation if you need to query for it with every request:

您可以为控制器创建基类,并在创建期间设置它,如果您需要使用每个请求进行查询:

public class BaseController : Controller
{
    public BaseController()
    {
        var catRepository = ...;
        ViewData["Categoriass"] = new SelectList(catRepository.FindAllCategorias().AsEnumerable(), "id", "nome", 3);
    }
}

That is not really efficient,because it will be executed with every controller. You can also create action filter which sets ViewData and apply it where needed.

这不是很有效,因为它将在每个控制器上执行。您还可以创建动作过滤器,用于设置ViewData并在需要时应用它。

#3

I have try Nick Masao & LukLed solutions, both of them are works.

我尝试过Nick Masao和LukLed解决方案,两者都是有效的。

However, the viewdata is set for masterpage, in my case, i assume masterpage will render every page.

但是,viewdata是为masterpage设置的,在我的例子中,我假设masterpage将呈现每个页面。

I have to apply the [DataForMasterPage] attribute (Nick Masao's solutions) or or inherits the BaseController (LukLed's solutions) on every View's Controller.

我必须应用[DataForMasterPage]属性(Nick Masao的解决方案)或者在每个View的Controller上继承BaseController(LukLed的解决方案)。

So, is it possible create a Class and invoke on Global.asax Application_Start event to make it Set viewdata everytimes?

那么,是否有可能创建一个类并在Global.asax Application_Start事件上调用以使其每次都设置为viewdata?

#4

You could also create a ContentPlaceHolder where you want the partial view to render and call the RenderPartial() from the underlying pages. That way you can pass the model as usual.

您还可以创建一个ContentPlaceHolder,您希望部分视图在底层页面中呈现并调用RenderPartial()。这样你就可以像往常一样传递模型。

#1