Search results matching tag 'Controller'

Navigating to a non-existing controller or view produces a blank page, is there a fix?

MrKazoo — Fri, 18 Dec 2009 05:00:00 GMT

I am developing a new ASP.NET MVC 1 application and keep running into this scenario.

In my application I can trap calls to views that are not providing the proper ID setting, e.g. www.site.com/existingcontroller/existingview

The issue i am running into is when this same call is to a non-existing contoller or view, e.g. www.site.com/nonexistingcontroller or www.site.com/existingcontroller/nonexistingview

This seems to be a scenario that would be an issue for every ASP.NET MVC application but I can't seem to find any help about it.

Anyone out there solved this or know where the info to solve it is?

Thanks

upload image to database and retrieve using MVC and Entity

openskymedia — Sat, 21 Nov 2009 05:00:00 GMT

I'm trying to follow the instructions on this page: http://bit.ly/8hJfyr for storing and retreiving images from my database. I'm using mvc and the entity framework and i'm not having luck with adapting this code to work. i feel like either he's assuming I should know stuff which I don't or something is just missing.

Specifically this line: PhotoViewImage image = PhotoViewImage.GetById(id); is giving me errors. I know that I need to adapt this so that it's retrieving my table.

In the comments it says that PhotoViewImage is a Entityframework class that has string name, string alternatetext, byte actual image and string content type.

Would that be going in the models folder or the controllers folder or am I on the wrong track all together?

Here is my ImageResultController.cs file: http://pastebin.com/m14eafd1f

Here is my ImagesController.cs file: http://pastebin.com/m45da9a92

and of course there's my lonely PhotoViewImage.cs file: http://pastebin.com/m20566525

Route to a single controller action

cranialsurge — Thu, 01 Oct 2009 04:00:00 GMT

How do I create a rule for all URLs to a specific View folder to go to the same controller action ... ?

For example any URL that ends in ~/Sections/ should go to ~/Sections/Index.

I've tried the following to no avail:-

routes.MapRoute(

"Sections", // Route name

"Sections/*", // URL with parameters

new { controller = "Sections", action = "Index"} // Parameter defaults

);

routes.MapRoute(

"Sections", // Route name

"Sections/*", // URL with parameters

new { controller = "Sections", action = "Index"} // Parameter defaults

);

Suggestion for next version - expose controller name

erick t — Wed, 30 Sep 2009 04:00:00 GMT

It would be very useful to have the name of the controller exposed on the object model, as I have often needed it. I can always get to it via reflection on the type, but this is expensive, and doesn't seem needed. To give the current specific scenario I am working on, I have a basic tab control, and it so happens that each tab maps to an action in a different controller. In the display of the tab, I want to show which is currently selected tab. The most common way I've seen this done is via cookies (jQuery, etc). However, I have a model for the tabs, and one of the properties is IsSelected. I have an extension method that gets called in the controller (BTW, another request would be an event on the controller on creation) that populates the ViewData with the tabs. The catch is that I need to determine which one is selected, and if I know the controller name, I can figure that out. Make sense?

In summary, I would love to see:

An event or two that gets called when a controller is created

A property that exposes the name of the controller, via convention.

Thanks,
Erick

How to add item to cache in controller's constructor?

webster.net — Sun, 16 Aug 2009 04:00:00 GMT

If I use HttpContext.Cache.Add

I get the error: "System.NullReferenceException: Object reference not set to an instance of an object." from the line in Default.aspx

httpHandler.ProcessRequest(HttpContext.Current);

Is there another way?

Passing collections as parameters from view to controller and via RedirectToAction

SergID — Thu, 23 Apr 2009 04:00:00 GMT

I'm implementing the following scenario:

There is view with a catalogue of items (like products) and a filter for them. Filter is a list of checkboxes and each of the checkboxes represents one category for an item. The number of categories is not fixed.

In my controller I get all the date for the filter with the following method:

[AcceptVerbs(HttpVerbs.Post)]
        public RedirectToRouteResult List(int? page, FormCollection formCollection)
        {
            IEnumerable<int> categoryFilter = selectFilterIDs(formCollection, "category");    //parsing the Form Collection object

            return RedirectToAction("List",
                new
                {
                    page = 1,
                    filterCategoryIDs = categoryFilter
                });
        }

this method passes all the data to:

[AcceptVerbs(HttpVerbs.Get)]
        public ActionResult List(int? page, IEnumerable<int> filterCategoryIDs)
        {

            //restore selected and unselected values
            ViewData["selectedCategories"] = filterCategoryIDs;

.............

        }

So after the redirect I get an empty IEnumerable<int> filterCategoryIDs. It is not equal to null, it is just empty.

The same happens when I try to pass data from my view when making the pagination:

<%= Html.Pager(

ViewData.Model.PageSize,

ViewData.Model.PageNumber,

ViewData.Model.TotalItemCount,

new { filterOrderTypeIDs = ViewData["selectedOrderTypes"], filterCategoryIDs = ViewData["selectedCategories"] })

%>

So the question is how to pass collections as parameters properly

Why isn't UpdateModel virtual?

simeyla — Mon, 09 Feb 2009 05:00:00 GMT

I've heard Phil on a podcast say 'traditionally people make things non-virtual unless theres a good reason not to, but we decided to make things virtual unless theres a good reason not to'...

Therefore you tell me why all the Controller.UpdateModel methods are non-virtual ? Is there a legitimate good reason?

I want to be able to do this :

I have an abstract base controller, and a model (ModelBase) used by all the models in my page. I want to be able to do UpdateModel (productsModel) and have it update the base model too.

I just don't want to use 'new' as I am having to do.

public abstract class RRController : Controller
{

public RRController()
: base() {
}

protected internal new void UpdateModel<TModel>(TModel model) where TModel : ModelBase
{
base.UpdateModel(model);
UpdateBaseModel(model);
}

public void UpdateBaseModel(ModelBase model)
{
model.Initialized = true;
model.PromotionID = ((string)Session["PromotionId"] ?? "").ToUpper();
model.PartnerId = ((int?)Session["PartnerId"]) ?? 6; // rolling razor #&#&#&#&#&
}

}

Re: MVC Controller and URL logic?

ericis_com — Tue, 30 Dec 2008 05:00:00 GMT

Holy crapoly! I thought MVC would make my life easier! :D

Simpler answer: I overload my controller's constructor to accept a URL and use the HttpContext's HttpRequest URL in the default constructor?

Better simpler answer: I create a custom "MyController" base class with the overloaded constructor to accept a URL and inherit this new base class in all of my controllers.

Mildly complex answer: Evolve my custom MyController's overloaded constructor to accept an "IApplicationContext" object whose actual implementation is injected by Unity and write custom implementations of "IApplicationContext" as needed that would likely mock HttpContext to some degree.

Complex answer (IMHO): Mock the freaking HttpContext! Okay, it's probably not THAT bad.

MVC + Unity Containers + MSTest?

ericis_com — Tue, 30 Dec 2008 05:00:00 GMT

How can I expose Unity to my MVC contollers for unit testing? I quickly found resources for exposing Unity to MVC through a Controller Factory in a custom HttpApplication Start event. But, unit tests usually create and call Controllers directly, so... I suppose I could create a custom Controller class that exposes and initializes Unity within a controller, but then I have the problem of running as a web application, maintaining a single instance of Unity to work with. I suppose I could attempt a static instance on some custom global object... Seems like such a kludge at this point.

How to redirect to another controller based on a wildcard

Dan Atkinson — Fri, 17 Oct 2008 04:00:00 GMT

Hi there! I have a problem which I'm sure should be fairly simple.

I have several routes which catch various different types of urls that contain different structures, but they correspond to other urls which can be found inside the routescollection.

routes.MapRoute(
  "Product",
  "products/{product}.htm",
  new { controller = "Product", action = "ShowProduct" }
);

routes.MapRoute(
  "ProductReview",
  "products/{product}/reviews.htm",
  new { controller = "Product", action = "ShowProductReview" }
);

routes.MapRoute(
  "Partner",
  "partners/{partner}/{*wildcard}",
  new { controller = "Partners", action = "PartnerRedirect" }
);

In this example, I have the product route, and then I have partner sites which could also go to a product page. For example, Lets say I go to http://mysite.com/products/cola.htm. This should go to the same url as http://mysite.com/partners/pesi/products/cola.htm, and the PartnerRedirect would be able to handle the url based on the wildcard.

My question is, how can I, from the wildcard, determine what controller to pass the user onto?

Many thanks in advance.