从PartialView MVC3的父级访问值

Question

i need to maintain student interest in edit mode there is partial view where two list boxes - one for current interest and other for available (which are not added in student profile) each interest has a ajax Action link. when i click on it it add to student current interest. problem is that-- i need to send student id with it which is from parent view( ie not from partial view), and student id is in url or -- how can i access student id in partial view

// Code sample

@model StdMan.Models.Student

@{
    ViewBag.Title = "Edit";
}

<h2>Edit</h2>

<script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>
<script src="../../../../Scripts/jquery-1.5.1.min.js" type="text/javascript"></script>



@using (Html.BeginForm()) {
    @Html.ValidationSummary(true)
    <fieldset>
        <legend>Project</legend>

        <div class="editor-label">
            @Html.LabelFor(model => model.StId)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.StId)
            @Html.ValidationMessageFor(model => model.StId)
        </div>

    <div class="editor-label">
            Intested In              
        </div>
        <div class="editor-field" id="Interest">
          @Html.Action("PartialAddInterest", "Interest")
        </div>  

     </fieldset>
    <p>
            <input type="submit" value="Save" />
        </p>
}

////////// -- PartialView PartialAddInterest.cshtml

@model IEnumerable<StdMan.Models.Interest>

<table>
@foreach (var item in ViewBag.Added)
{
    <tr>
        <td>@item.Name

            @Ajax.ActionLink("Remove", "RemoveInterest",new { id = item.IsId },
    new AjaxOptions
    {
        UpdateTargetId = "Interest",
        InsertionMode = InsertionMode.Replace,
        HttpMethod = "GET"
    })
        </td>
    </tr>
}
</table>

<table>

@foreach (var item in ViewBag.Rem)
{
    <tr>
        <td>@item.Name

            @Ajax.ActionLink("Add", "AddInterest", new { id = item.IsId },
    new AjaxOptions
    {
        UpdateTargetId = "Interest",
        InsertionMode = InsertionMode.Replace,
        HttpMethod = "GET"
    })
        </td>
    </tr>
}

</table>

I have to pass model.StId with Ajax Actionlink like @Ajax.ActionLink("Add", "AddInterest", new { id = item.IsId, StId = @Model.StId },

In controller

 public ActionResult AddInterest( int id, int StId)
 {
          //logic to add interest in specific student profile depend on StId
 }

Answer 1

You could pass the student id to the PartialAddTool child action:

@Html.Action("PartialAddTool", "Interest", new { id = Model.StId })

and now the controller action will have the student id:

public ActionResult PartialAddTool(int stdId)
{
    ...
}

Now all that's left is have the PartialAddTool action set some property on the view model that is passed to the partial view. Currently this partial view seems to be strongly typed to IEnumerable<StdMan.Models.Interest> but you could create a new view model which has 2 properties: the student id and a collection of interests. This way the partial view will have the student id and it could be used when generating the links to finally be passed to the AddInterest action.