asp mvc partial with model and ViewDataDictionary - how do I access the ViewDataDictionary?

Question

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.

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

Model

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 (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 (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

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

Community · Accepted Answer · 2017-05-23 10:31:16Z

142

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

asp.net MVC RC1 RenderPartial ViewDataDictionary

I ended up using this terse syntax

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

Then in partial view

@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>

edited May 23, 2017 at 10:31

CommunityBot

11 silver badge

answered Feb 1, 2011 at 16:57

house9

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