ContactManager Tutorial #6: Delete Post Action For ContactGroup RSS

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  geomar

  Member

  169 Points

  97 Posts

  ContactManager Tutorial #6: Delete Post Action For ContactGroup

  Apr 14, 2009 09:47 PM|LINK

  I am running into an issue when attempting to delete a ContactGroup.   The initial GET for the Delete returns the proper ContactGroup.  But the POST is not receiving same ContactGroup from MVC.  While debugging the POST action, I see that a default ContactGroup with an Id of 0 and a GroupName of null is being passed to the POST action by MVC.

  GET Action (OK)

        public ActionResult Delete(int id) {
  
              return View("Delete", service.GetContactGroup(id));
          }

  POST Action (Not OK)
  
          [AcceptVerbs(HttpVerbs.Post)]
          public ActionResult Delete(ContactGroup group) {
              if (service.DeleteContactGroup(group))
                  return RedirectToAction("Index");
  
              return View("Delete", service.GetContactGroup(group.ContactGroupId));
          }

  GET VIEW

  <%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<ContactManager.Models.ContactGroup>" %>

  <asp:Content ID="Content1" ContentPlaceHolderID="TitleContent" runat="server">
         Delete
  </asp:Content>
  <asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
        <h2>Delete</h2>
        <p>
              Are you sure that you want to delete the group
              <%= Model.GroupName %> and all contacts associated with the group?
       </p>
       <% using (Html.BeginForm(new { id = Model.ContactGroupId })) {%>
             <p>
                   <input type="submit" value="Delete" />
              </p>
        <% } %>
  </asp:Content>

  Could someone let me know why this is happening, and what I need to do to fix it?

  Thanks,
  Mark

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  paul.vencill

  Contributor

  6716 Points

  1358 Posts

  Re: ContactManager Tutorial #6: Delete Post Action For ContactGroup

  Apr 15, 2009 04:19 AM|LINK

  Try changing the second one to take an int instead, lookss like that's all you're passing up.  Unless you have a modelbinder in there, you won't get a proper object conversion.

  Paul

   

  Mark as answered if this helps, thanks.

  Help those who have helped you... remember to "Mark as Answered"
• • Reply
  

  geomar

  Member

  169 Points

  97 Posts

  Re: ContactManager Tutorial #6: Delete Post Action For ContactGroup

  Apr 15, 2009 12:34 PM|LINK

  Yeah.  Most other tutorials do pass the integer into the POST Delete action.  However, the MVC Contact Manager Tutorial from this site did not.  I was trying to find out how to accomplish the task in the same way as the Tutorial.  Perhaps this Tutorial was created before RTM 1.0.

  Here is the Tutorial Code.  In my code, I renamed the Group object and some of its members for sake of specificity.  The Create, and Edit actions are working fine with the renamed objects.  Only the Delete action is causing problems.

   GET Action

  public ActionResult Delete(int id)
  {
        return View("Delete", _service.GetGroup(id));
  }

  POST Action

  [AcceptVerbs(HttpVerbs.Post)]
  public ActionResult Delete(Group groupToDelete)
  {
        if (_service.DeleteGroup(groupToDelete))
              return RedirectToAction("Index");

        return View("Delete", _service.GetGroup(groupToDelete.Id));
  }

   GET View

  <%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<ContactManager.Models.Group>" %>

  <asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
        <title>Delete</title>
  </asp:Content>

  <asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
        <h2>Delete</h2>

        <p>
              Are you sure that you want to delete the group
              <%= Model.Name %> and all contacts associated with the group?
        </p>

        <% using (Html.BeginForm(new { Id = Model.Id })) { %>
              <p>
                    <input type="submit" value="Delete" />
              </p>
        <% } %>
  </asp:Content>

  Thanks.

  • Edited by geomar on Apr 15, 2009 12:36 PM
  • Edited by geomar on Apr 15, 2009 12:37 PM
  • Edited by geomar on Apr 15, 2009 12:43 PM
• • Reply
  

  geomar

  Member

  169 Points

  97 Posts

  Re: ContactManager Tutorial #6: Delete Post Action For ContactGroup

  Apr 15, 2009 07:30 PM|LINK

  I am interested in creating a delete action with a POST using an object instead of an integer.   If an id is used for the GET, then an id can only be used for the POST if an additional unneeded and unused parameter is placed into the POST signature.  Without this dummy parameter, a duplicate signature error is thrown.

   Can a delete POST action be performed in the current version of MVC by passing in an object instead of an integer?

   Thanks 

  • Edited by geomar on Apr 15, 2009 07:42 PM
  • Edited by geomar on Apr 15, 2009 07:42 PM