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POASP.net MVC create related object using partials
 

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    <p>I am relatively new to ASP and MVC but have got on ok so far. I am using the DB first approach and have my DB tables all setup (it is an existing DB cleaned up with FKs etc).</p> <p>I have a route of FKs:</p> <pre><code>Contact - LettingContact - Landlord - Tenant </code></pre> <p>I would like to be able to use partials to display the data e.g. /Contact/_Create will hold the Contact info i.e. Title, Forename, Surname and will be used both by /Contact/Create and /Tenant/Create. I managed to get it working not using the partials and just using the field on the Tenant/Create html form and showing the relevant data from the models. To the Tenant/Create in the controller i did the following (doing the following stopped me getting null exceptions in the partial)</p> <pre class="lang-default prettyprint-override"><code>Tenant tenant = new Tenant(); LettingsContact lettingsContact = new LettingsContact(); Contact contact = new Contact(); tenant.LettingsContact = letContact; tenant.LettingsContact.Contact = contact; return View(tenant) </code></pre> <p>Now the View is</p> <pre><code>//using Html.BeginForm etc @{ Html.RenderPartial("../Contact/_Create", Model.LettingsContact.Contact); Html.RenderPartial("_Create", Model); } &lt;input type="submit" value="create"&gt; //rest of html </code></pre> <p>Now when I click the submit button it goes to my /Tenant/Create post event.</p> <pre><code>[HttpPost] public ActionResult Create(Tenant tenant) { if (ModelState.IsValue) { tenant.ContactID = Guid.NewGuid(); tenant.LettingsContact.Contact.ContactID = tenant.ContactID; db.Tenants.AddObject(tenant); db.SaveChanges(); return RedirectToAction("Index"); } } </code></pre> <p>However the line which reads <code>tenant.LettingContact.Contact.ContactID</code> crashes will a NullReferenceException to the LettingsContact is null. Any reason why the partials are not maintaining the Models?</p> <p>Also if there is a better way of doing this please let me know as this is still very new to me. </p> <p>The reason I want to use partials is that it will enable me to reuse the forms in jQuery modal forms etc.</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.

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