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POPassing back child entity from MVC view to controller
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  1. POPassing back child entity from MVC view to controller
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    copied!<p>I'm trying to delete entries which are marked (checked) in view, but not sure how to pass back the collection back to the controller<br> my mode is:<br> <code>Group</code> which has <code>ICollection&lt;SubGroup&gt; SubGroups</code> and SubGroup has <code>ICollection&lt;Event&gt; Events</code><br> I pass <code>Group</code> to the view and iterate and display Event details including a checkbox so if it's checked the event entry should be deleted.<br> When I get the postback to the controller, <code>Group.SubGroups</code> is null </p> <ul> <li>How do I make sure the child entities are passed back to the controller?</li> <li>Can I use <code>@Html.CheckBox</code> instead Of <code>&lt;input type="checkbox"...</code> ? </li> </ul> <p><strong>Update:</strong> Model </p> <pre><code>public class Group { [Key] public int GroupId { get; set; } public virtual IList&lt;SubGroup&gt; SubGroups { get; set; } .... } public class SubGroup { [Key] public int SubGroupId { get; set; } public virtual IList&lt;Event&gt; Events { get; set; } .... } public class Events { [Key] public int EventId { get; set; } public string EventName { get; set; } public bool IsDeleted { get; set; } .... } </code></pre> <p><strong>I am passing <em>Group</em> to the view (see below) as the Model and want to delete events which are checked by the user</strong> </p> <p>View: </p> <pre><code>@using System.Globalization @model NS.Models.Group @{ ViewBag.Title = "Edit"; } @using (Html.BeginForm()) { @Html.ValidationSummary(true) &lt;fieldset&gt; &lt;legend&gt;Booking Details&lt;/legend&gt; &lt;div class="display-label"&gt; Group Name &lt;/div&gt; &lt;div class="display-field"&gt; @Html.DisplayFor(model =&gt; model.GroupName) &lt;/div&gt; &lt;div class="display-field"&gt; @foreach (var b in Model.SubGroup) { groupNo += 1; &lt;table class="main" style="width: 80%; margin-top: 10px"&gt; &lt;tr&gt; &lt;th&gt; @Html.DisplayName("Sub Group ") @Html.DisplayName(b.SubGroupName) &lt;/th&gt; &lt;/tr&gt; &lt;table class="main" style="width: 80%;"&gt; &lt;tr&gt; &lt;th&gt;Event&lt;/th&gt; &lt;th&gt;Delete&lt;/th&gt; &lt;/tr&gt; @foreach (var ev in b.Events) { &lt;tr&gt; &lt;td&gt; @Html.DisplayFor(modelItem =&gt; ev.EventName) &lt;/td&gt; &lt;td&gt; &lt;input type="checkbox" id="eventToDelete" name="eventToDelete" value="@ev.EventId" /&gt; &lt;/td&gt; &lt;/tr&gt; } &lt;/table&gt; &lt;/table&gt; } &lt;/div&gt; &lt;p&gt; &lt;input type="submit" name="xc" value="Delete" class="button" /&gt; &lt;/p&gt; &lt;/fieldset&gt; } </code></pre> <p>Thank You</p>
 

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