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POASP.NET MVC newbie: getting/passing data in dropdown form for multiple objects in an edit View
 

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  1. POASP.NET MVC newbie: getting/passing data in dropdown form for multiple objects in an edit View
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    <p>Using the Authors/Books catalog example, let's say I want to edit the info for the books of a specific author.</p> <p>When someone navigates to domain.com/Books/Edit/2, I want to display an edit view for all the books where Author_ID = 2. Among the various book info is the book category (fiction, non-fiction, textbook, whatever) These categories are in their own table and are referenced by a Category_ID.</p> <p>What's the best way to set up the edit form?</p> <p>Currently in my controller I have something like this:</p> <pre><code>public ActionResult Edit(int id) { IQueryable&lt;Book&gt; books = bookRepository.FindBooksForAuthor(id); return View(books); } </code></pre> <p>And in my partial view:</p> <pre><code>&lt;%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl&lt;IQueryable&lt;Authors.Models.Book&gt;&gt;" %&gt; &lt;%= Html.ValidationSummary("Edit was unsuccessful. Please correct the errors and try again.") %&gt; &lt;% using (Html.BeginForm()) {%&gt; &lt;fieldset&gt; &lt;legend&gt;Fields&lt;/legend&gt; &lt;%var i = 0; foreach (var book in Model) {%&gt; &lt;p&gt; &lt;label for="Category_ID"&gt;Category_ID:&lt;/label&gt; &lt;%= Html.TextBox("Category_ID", book.Category_ID)%&gt; &lt;%= Html.ValidationMessage("Category_ID", "*")%&gt; &lt;/p&gt; &lt;p&gt; &lt;label for="Description"&gt;Description:&lt;/label&gt; &lt;%= Html.TextBox("Description", book.Description)%&gt; &lt;%= Html.ValidationMessage("Description", "*")%&gt; &lt;/p&gt; &lt;%i++; } %&gt; &lt;p&gt; &lt;input type="submit" value="Save" /&gt; &lt;/p&gt; &lt;/fieldset&gt; &lt;% } %&gt; </code></pre> <p>Is my <code>Inherits</code> set properly at the top of the view since I'm passing an <code>IQueryable</code> object?</p> <p>More importantly, how do I get the Category_ID field to be a DropDown with the correct category selected? Can I just send the data for the dropdown to the view and figure out the selected item at the view level?</p> <pre><code>ViewData["categories"] = new SelectList(_db.BookCategories.ToList().OrderBy(b =&gt; b.Category_Title), "Category_ID", "Category_Title"); </code></pre>
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