ASP MVC部分与模型和的ViewDataDictionary - 我怎么访问的ViewDataDictionary？ [英] asp mvc partial with model and ViewDataDictionary - how do I access the ViewDataDictionary?

问题描述

我创建它与任务的集合更新两个相关的模型，在这个例子中的一个项目的形式，我想控制器接受已经从表单输入加载其任务集合的单个项目。我有这个工作，基本上是低于code，而不部分。

I am creating a form which updates two related models, for this example a Project with a collection of Tasks, I want the controller to accept a single Project which has its Task collection loaded from the form input. I have this working, essentially the below code without a partial.

这听起来很傻，但我无法弄清楚如何从局部访问计数器（我）？

This might sound silly but I cannot figure out how to access the counter (i) from the partial?

示范

public class Project
{
    public string Name { get; set; }
    public List<Task> Tasks { get; set; }
}

public class Task
{
    public string Name { get; set; }
    public DateTime DueDate { get; set; }
}

Create.cshtml（视图）

Create.cshtml (View)

@model MyWebApp.Models.Project

@using(Html.BeginForm("Create", "Project", FormMethod.Post, new { id = "project-form" }))
{
    <div>
        @Html.TextBox("Name", Model.Name)
    </div>

    @for(int i = 0; i < Model.Tasks.Count; i++)
    {
        @Html.Partial("_TaskForm", Model.Tasks[i], new ViewDataDictionary<int>(i))
    }

}

_TaskForm.cshtml（局部视图）

_TaskForm.cshtml (partial view)

@model MyWebApp.Models.Task

<div>
    @Html.TextBox(String.Format("Tasks[{0}].Name", 0), Model.Name)
</div
<div>
    @Html.TextBox(String.Format("Tasks[{0}].DueDate", 0), Model.DueDate)
</div

请注意了上面的String.Format我硬编码0，我想用这势必变量i从调用视图

NOTE the String.Format above I am hardcoding 0, I want to use the ViewDataDictionary parameter which is bound to the variable i from the calling View

推荐答案

猜猜我太早公布。这个线程有我一直在寻找

Guess I posted too soon. This thread had the answer I was looking for

<一个href=\"http://stackoverflow.com/questions/495351/asp-net-mvc-rc1-renderpartial-viewdatadictionary\">asp.net MVC RC1的RenderPartial的ViewDataDictionary

我结束了使用这种简洁的语法

I ended up using this terse syntax

@Html.Partial("_TaskForm", Model.Tasks[i], new ViewDataDictionary { {"counter", i} } )

然后在局部视图

@model MyWebApp.Models.Task
@{
    int index = Convert.ToInt32(ViewData["counter"]);
}

<div>
    @Html.TextBox(String.Format("Tasks[{0}].Name", index), Model.Name)
</div>
<div>
    @Html.TextBox(String.Format("Tasks[{0}].DueDate", index), Model.DueDate)
</div>

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