Question

I have this actionresult method:

public ActionResult MenuItemCreated(MenuItem item)
{
    return View(item);
}

And this is my view:

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

<asp:Content ID="Content1" ContentPlaceHolderID="TitleContent" runat="server">
    MenuItemCreated
</asp:Content>

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

    <h2>MenuItemCreated</h2>

    <%: Model.Caption %> is created succesfully
</asp:Content>

What I see on the page is correct (test is created successfully). But my querystring looks like this:

http://localhost:62602/Admin/MenuItemCreated/2?Caption=test&Link=%2Fclient

EDIT:
The ActionResult is called from this method:

public ActionResult CreateMenuItem(FormCollection fc)
{
    MenuItem menuItem = CreateMenuItemFrom(fc);
    SaveMenuItem(menuItem);

    return RedirectToAction("MenuItemCreated", menuItem);
}

EDIT II:

Corresponding view:

<% using (Html.BeginForm("CreateMenuItem","Admin",FormMethod.Post)) {%>
    <%: Html.ValidationSummary(true) %>

    <fieldset>
        <legend>Fields</legend>

        <div class="editor-label">
            <%: Html.LabelFor(model => model.Caption) %>
        </div>
        <div class="editor-field">
            <%: Html.TextBoxFor(model => model.Caption) %>
            <%: Html.ValidationMessageFor(model => model.Caption) %>
        </div>

        <div class="editor-label">
            <%: Html.LabelFor(model => model.Link) %>
        </div>
        <div class="editor-field">
            <%: Html.TextBoxFor(model => model.Link) %>
            <%: Html.ValidationMessageFor(model => model.Link) %>
        </div>

        <div class="editor-label">
            <%: Html.LabelFor(model => model.ParentId) %>
        </div>
        <div class="editor-field">
            <%: Html.TextBoxFor(model => model.ParentId) %>
            <%: Html.ValidationMessageFor(model => model.ParentId) %>
        </div>

        <p>
            <input type="submit" value="Create MenuItem" />
        </p>
    </fieldset>

<% } %>

Why is this? I don’t want the querystring to be shown.

Answer 1

The problem is the following line:

return RedirectToAction("MenuItemCreated", menuItem);

You cannot pass complex objects like this when you perform a redirect. Only simple scalar properties:

return RedirectToAction("MenuItemCreated", new {
    id = menuItem.Id
});

and then inside the action you are redirecting to fetch the corresponding menu item model given the id:

public ActionResult MenuItemCreated(int id)
{
    var menuItem = _someRepository.GetMenuItem(id);
    ...
}