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POUpdating Parent/Child Records with model binders in ASP.Net MVC
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  1. POUpdating Parent/Child Records with model binders in ASP.Net MVC
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    copied!<p>I have modified the <a href="http://www.nerddinner.com/" rel="nofollow noreferrer">Nerd Dinner</a> application to allow editing of child records by adding the following code to the DinnerForm.ascx</p> <pre><code> &lt;p&gt; &lt;%int i = 0; foreach (NerdDinner.Models.RSVP rsvp in this.Model.Dinner.RSVPs) { %&gt; &lt;%= Html.Hidden("Dinner.RSVPs[" + i + "].RsvpID", rsvp.RsvpID)%&gt; &lt;%= Html.Hidden("Dinner.RSVPs[" + i + "].DinnerID", rsvp.DinnerID)%&gt; &lt;%= Html.TextBox("Dinner.RSVPs[" + i + "].AttendeeName", rsvp.AttendeeName)%&gt; &lt;% i += 1; } %&gt; &lt;/p&gt; </code></pre> <p>it is rendering this:</p> <pre><code>&lt;p&gt; &lt;input id="Dinner_RSVPs[0]_RsvpID" name="Dinner.RSVPs[0].RsvpID" type="hidden" value="36" /&gt; &lt;input id="Dinner_RSVPs[0]_DinnerID" name="Dinner.RSVPs[0].DinnerID" type="hidden" value="63" /&gt; &lt;input id="Dinner_RSVPs[0]_AttendeeName" name="Dinner.RSVPs[0].AttendeeName" type="text" value="kp" /&gt; &lt;input id="Dinner_RSVPs[1]_RsvpID" name="Dinner.RSVPs[1].RsvpID" type="hidden" value="37" /&gt; &lt;input id="Dinner_RSVPs[1]_DinnerID" name="Dinner.RSVPs[1].DinnerID" type="hidden" value="63" /&gt; &lt;input id="Dinner_RSVPs[1]_AttendeeName" name="Dinner.RSVPs[1].AttendeeName" type="text" value="jim" /&gt; &lt;/p&gt; </code></pre> <p>I have not modified the DinnersControler's Post Edit Action method. The Parent dinner is getting updated as usual, but it appears the UpdateModel(dinner); is not seeing/updating the child RSVP records.</p> <p>I have tried a few variations on rendering the child records so that the Model binders will see the collection, with no luck.</p> <p>Is updating parent/child records in one shot by calling UpdateModel(Parent); possible with the current model binders?</p>
 

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