Q:

Pass Model with set values to PartialView

I'm building a blog with ASP.NET MVC 2 for fun, to learn and maybe to use it latter in the future.  Right now my problem is adding a comment to a post.  I have the post Details Strongly Typed view displaying the post, and I'm rendering a Strongly Typed PartialView that has the Form to add a new comment.  What I'm trying to do is this:
<%@ Page Title="" Language="C#" Inherits="System. Web. Mvc. ViewPage<Blog. Models. Post>" %>

<h2>Details</h2>

<fieldset>
    <legend>Fields</legend>

    <div class="display-field"><h2><%: Model. Title %></h2></div>

    <div class="display-field">
        <p><%: Model. Summary %></p>
    </div>

    <div class="display-field">
        <p><%: Model. Content %></p>
    </div>

</fieldset>

<div id="comment-section">
    <% foreach (var comment in Model. Comments) 
       { %>
            <div>
                <h3><%: comment. Title %></h3>
                <p><%: comment. DateAdded %></p>
                <p><%: comment. Content %></p>
            </div>
    <% } %>
</div>

<div>
</div>

<% Html. RenderPartial("Comment/Add", new Blog. Models. Comment { PostID= Model. ID }); %>

<p>
    <%: Html. ActionLink("Edit", "Edit", new { id = Model. ID }) %> |
    <%: Html. ActionLink("Back to List", "Index") %>
</p>

And the Add PartialView is this one:
<% using (Html. BeginForm("Add", "Comment")) {%>
    <%: Html. ValidationSummary(true)%>

    <fieldset>
        <legend>Add a comment</legend>

        <div class="editor-label">
            <%: Html. LabelFor(model => model. Title)%>
        </div>
        <div class="editor-field">
            <%: Html. TextBoxFor(model => model. Title)%>
            <%: Html. ValidationMessageFor(model => model. Title)%>
        </div>

        <div class="editor-label">
            <%: Html. LabelFor(model => model. Content)%>
        </div>
        <div class="editor-field">
            <%: Html. TextAreaFor(model => model. Content, new { Style = "width:500px; height:150px;" })%>
            <%: Html. ValidationMessageFor(model => model. Content)%>
        </div>

        <p>
            <input type="submit" value="Add" />
        </p>
    </fieldset>

<% } %>

But in my CommentController when I get the posted Comment object, it comes with cero (0) as a PostID, so I can't bind it with it's corresponding Post.  Any thoughts? 

A:

Add the post ID as a hidden field...
<input type="hidden" name="PostID" value="<%: Model. ID %>" />

