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POASP.NET MVC: Best way to get form checkboxes into many-to-many DB assoc table with LINQ To SQL?
 

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  1. POASP.NET MVC: Best way to get form checkboxes into many-to-many DB assoc table with LINQ To SQL?
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    <p>I have an ASP.NET MVC view which contains checkboxes for user-defined categories.</p> <pre><code>&lt;td&gt;&lt;% foreach (Category c in (List&lt;Category&gt;)ViewData["cats"]) { if (selCats.ContainsKey(c.ID)) { %&gt; &lt;input name="CategoryIDs" type="checkbox" value="&lt;%=c.ID %&gt;" checked="checked" /&gt;&amp;nbsp;&lt;%= c.Name%&gt;&lt;% } else { %&gt; &lt;input name="CategoryIDs" type="checkbox" value="&lt;%=c.ID %&gt;" /&gt;&amp;nbsp;&lt;%= c.Name%&gt; &lt;% } %&gt; &lt;% } %&gt; &lt;/td&gt; </code></pre> <p>The form is posted to the following controller action:</p> <pre><code>[AcceptVerbs(HttpVerbs.Post)] public ActionResult Edit(int id, int [] CategoryIDs) { PostsDataContext db = new PostsDataContext(); var post = db.Posts.Single(p =&gt; p.ID == id); UpdateModel(post, new[] { "Title", "Subtitle", "RawContent", "PublishDate", "Slug" }); db.SubmitChanges(); return Redirect("/archives/" + post.Slug); } </code></pre> <p>The form checkboxes will be converted to an array of integer IDs "CategoryIDs", each representing a selected category. I then want to put these into a association table containing two columns: PostID and CategoryID. This is used to set up a many-to-many association between Posts and Categories.</p> <p>Currently I am brute-forcing it: looping through the categories, and for each one, adding a row to the association table containing the category ID, and the ID of the post to which it belong.</p> <p>But I'm wondering if there's a cleaner way to do this automagically in the context of ASP.NET MVC and LINQ to SQL?</p> <p>Thanks!</p>
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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