R – How to pass data from a controller to a strongly typed user control in asp.net mvc

asp.net-mvcmaster-pagesuser-controls

I have a strongly typed User Control which should show a user's orders on all pages, it's included in a master page. I have an OrdersController which can give me the current orders and is used at other locations.

How do I tell the UserControl in the Master Page that it should get its Data from that specific Controller / Controller Action? I'd like to access the viewdata within the ascx just as I would in a normal View.

Best Answer

Pass model and ViewData as parameters to the RenderPartial method. It will make model and view data accessible as if you were in the parent view page.

<% Html.RenderPartial ( "../Shared/HRMasterData/DependentPersonDossiers",
  ViewData.Model, ViewData ); %>

Related Solutions

Asp.net-mvc – Can an ASP.NET MVC controller return an Image

Use the base controllers File method.

public ActionResult Image(string id)
{
    var dir = Server.MapPath("/Images");
    var path = Path.Combine(dir, id + ".jpg"); //validate the path for security or use other means to generate the path.
    return base.File(path, "image/jpeg");
}

As a note, this seems to be fairly efficient. I did a test where I requested the image through the controller (http://localhost/MyController/Image/MyImage) and through the direct URL (http://localhost/Images/MyImage.jpg) and the results were:

MVC: 7.6 milliseconds per photo
Direct: 6.7 milliseconds per photo

Note: this is the average time of a request. The average was calculated by making thousands of requests on the local machine, so the totals should not include network latency or bandwidth issues.

C# – How to return the current action in an ASP.NET MVC view

In the RC you can also extract route data like the action method name like this

ViewContext.Controller.ValueProvider["action"].RawValue
ViewContext.Controller.ValueProvider["controller"].RawValue
ViewContext.Controller.ValueProvider["id"].RawValue

Update for MVC 3

ViewContext.Controller.ValueProvider.GetValue("action").RawValue
ViewContext.Controller.ValueProvider.GetValue("controller").RawValue
ViewContext.Controller.ValueProvider.GetValue("id").RawValue

Update for MVC 4

ViewContext.Controller.RouteData.Values["action"]
ViewContext.Controller.RouteData.Values["controller"]
ViewContext.Controller.RouteData.Values["id"]

Update for MVC 4.5

ViewContext.RouteData.Values["action"]
ViewContext.RouteData.Values["controller"]
ViewContext.RouteData.Values["id"]