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PORedirection error
 

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    <p>Taking first steps with ASP.NET MVC, I am trying to create a simple (and typical) article-with-comments page: under an article itself there should be a form enabling an user to post a comment to the article. </p> <p>I created a partial view for the submit form and <code>CommentController</code> with following methods:</p> <pre><code>public ActionResult Add(int entryId); [HttpPost] public ActionResult Add(Comment comment); </code></pre> <p>Then, under the article in a view of <code>HomeController</code>:</p> <pre><code>&lt;div class="add-comment"&gt; @{ Html.RenderAction("Add", "Comment", new { entryId = Model.EntryId }); } &lt;/div&gt; </code></pre> <p>The form renders properly and the adding procedure actually works (comment gets saved into database), but after redirecting back to the article <code>InvalidOperationException</code> is thrown, with <code>Html.RenderAction</code> (the one shown above) highlited in debugger:</p> <blockquote> <p>System.InvalidOperationException: Child actions are not allowed to perform redirect actions.</p> </blockquote> <p>Why does it happen?</p> <p>Here's the code for <code>CommentController</code> methods:</p> <pre><code>public ActionResult Add(int entryId) { var comment = new Comment { EntryId = entryId }; return PartialView(comment); } [HttpPost] public ActionResult Add(Comment comment) { if (ModelState.IsValid) { comment.Date = DateTime.Now; var entry = db.Entries.FirstOrDefault(e =&gt; e.EntryId == comment.EntryId); if (entry != null) { entry.Comments.Add(comment); db.SaveChanges(); return RedirectToAction("Show", "Home", new { id = entry.EntryId }); } } return PartialView(comment); } </code></pre> <p>Or maybe should I even take a diffrent approach?</p>
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    1. USUwe Keim
    1. USClueless
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    1. COThis answer probably has an explenation. I see that I have upvoted it at some point so it has helped me at least :) http://stackoverflow.com/questions/2056421/why-are-redirect-results-not-allowed-in-child-actions-in-asp-net-mvc-2
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    2. COWhere is the action method of getting comments from database ?
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      1. USImad Alazani
    3. COThere is none. Model class passed to view (action Show) has a collection of comments as a navigation property, so displaying them wasn't a problem.
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