I came across the following issue:
I have a main simple page on which I want to test a controller action. The controller is in another project but is referenced in my MVC project and also in Web.config namespace region.
The simple page is this:
<%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage" %>
<%@ Import Namespace="Controllers.MyControllers" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<div>
<%=Html.ActionLink("Persons", "SearchPersons","Person")%>
</div>
</body>
</html>
The PersonController has a methods SearchPersons that returns a View. The PersonController is defined in Controllers project in the namespace Controllers.MyControllers.
When the simple page is loading, it throws the following exception at my Html.ActionLink call:
{"Object reference not set to an instance of an object."} at System.Web.Mvc.Html.LinkExtensions.ActionLink(HtmlHelper htmlHelper, String linkText, String actionName, String controllerName, RouteValueDictionary routeValues, IDictionary`2 htmlAttributes)
at System.Web.Mvc.Html.LinkExtensions.ActionLink(HtmlHelper htmlHelper, String linkText, String actionName, String controllerName)
at ASP.default_aspx.__Render__control1(HtmlTextWriter __w, Control parameterContainer) in d:\Projects\MVC\Default.aspx:line 12
at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer)
at System.Web.Mvc.ViewPage.Render(HtmlTextWriter writer)
at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)
at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter)
at System.Web.UI.Control.RenderControl(HtmlTextWriter writer)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
Could someone point me to the right direction? Which item is actually null ? Is it a referencing problem (considering is in another project) ?
Thanks in advance,
Tamash
This error isn’t linked to where you declare your controllers. My supposition is you have a route witch declares a parameter that is not optional nor it has a default value.