Partial view displaying error

Question

I created a drop down list in a partial view and I am trying to render that on my aspx page. I am getting an error:

{"Error executing child request for handler 'System.Web.Mvc.HttpHandlerUtil+ServerExecuteHttpHandlerAsyncWrapper'."}

This is my aspx page where I am using the ascx control:

<td> <% Html.RenderAction("getFilterdData");%> </td>

My ascx control looks like this:

<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewPage<IEnumerable<assist>>" %> <%=Html.DropDownList("Assists", (SelectList)ViewData["Assists"], "--Select One--")%>

and my controller code is like this:

public ActionResult getFilterdData() { scorerep sc = new scorerep(); ViewData["Assists"] = new SelectList(sc.FilterData(), "assist_a",""); return View(); }

Why am I getting this error and how can I fix it?

Take a look here stackoverflow.com/questions/2817287/…

Paul
– Paul

2011-02-04 23:01:41 +00:00
Commented Feb 4, 2011 at 23:01 — Paul
– Paul, Commented Feb 4, 2011 at 23:01

Darin Dimitrov · Accepted Answer · 2011-02-05 08:44:12Z

It is difficult to help without seeing the entire exception stacktrace. Here are a few tips:

Make sure that your partial Inherits="System.Web.Mvc.ViewUserControl<IEnumerable<assist>>" and not Inherits="System.Web.Mvc.ViewPage<IEnumerable<assist>>". You are using an ASCX partial and inheriting from System.Web.Mvc.ViewPage which is wrong.
Make sure that your partial view is called exactly the same as the controller action: getFilterdData.ascx (I see a typo here)
Make sure that the Assist class contains a property called assist_a as that's what you are using when rendering the dropdown
Make sure there is no exception being thrown inside the getFilterdData controller action while you are fetching the data.

Here's a working example:

Model:

public class Assist { public string Id { get; set; } public string Value { get; set; } }

Controller:

public class HomeController : Controller { public ActionResult Index() { return View(); } public ActionResult GetFilteredData() { // TODO: replace with your repository logic ViewData["Assists"] = new SelectList(new[] { new Assist { Id = "1", Value = "Assist 1" }, new Assist { Id = "2", Value = "Assist 2" }, new Assist { Id = "3", Value = "Assist 3" }, }, "Id", "Value"); return View(); } }

View (~/Views/Home/Index.aspx):

<% Html.RenderAction("GetFilteredData"); %>

Partial: (~/Views/Home/GetFilteredData.ascx):

<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<IEnumerable<Assist>>" %> <%= Html.DropDownList("Assists", (SelectList)ViewData["Assists"], "--Select One--") %>

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