I am migrating a Webforms site to MVC. In my webforms site I have pages that utilise various combinations of User Controls, then chunks of html then Labels, Textboxes etc.
I don't want to hardwire each page so I am going to drive the output for each page from a CMS which specifies the order to insert the controls into the page.
I imagine each control will now be a Partial View in MVC. (Let me know if that's not correct).
So if I have two different partial views, ViewA and ViewB, how do I create a controller method that inserts the partial views into the view that is returned in the order determined by the CMS for a given url?
So assuming the controller method is called Reports and it takes a parameter called product.
eg //MySite/Reports?product=A returns a view containing ViewA, ViewA, ViewB, ViewA
whereas
//MySite/Reports?product=B returns a view containing ViewA, ViewB, ViewA, ViewB etc
So what should the code be for the controller method?
I hope that makes sense
If I understood you correctly this should solve your problem
Just create a new class derived from PartialViewResult which accepts multiple view names to render them. And to make it a little more usable create a new extension method for the controller to call your customized ViewResult.
That worked for me. You can use it so simply:
public ActionResult Index()
{
return this.ArrayView(new string[] { "ViewA", "ViewB" });
}
To make it work ArrayViewResult class should be:
public class ArrayViewResult : PartialViewResult
{
public IEnumerable<string> Views;
protected override ViewEngineResult FindView(ControllerContext context)
{
return base.FindView(context);
}
public override void ExecuteResult(ControllerContext context)
{
if (context == null)
throw new ArgumentNullException("context");
if (!Views.Any())
throw new Exception("no view...");
TextWriter writer = context.HttpContext.Response.Output;
foreach(var view in Views)
{
this.ViewName = view;
ViewEngineResult result = FindView(context);
ViewContext viewContext = new ViewContext(context, result.View, ViewData, TempData, writer);
result.View.Render(viewContext, writer);
result.ViewEngine.ReleaseView(context, result.View);
}
}
}
Extension method:
namespace System.Web.Mvc
{
public static class ArrayViewResultExtension
{
public static ArrayViewResult ArrayView(this Controller controller, string[] views)
{
return ArrayView(controller, views, null);
}
public static ArrayViewResult ArrayView(this Controller controller, string[] views, object model)
{
if (model != null)
{
controller.ViewData.Model = model;
}
return new ArrayViewResult
{
ViewName = "",
ViewData = controller.ViewData,
TempData = controller.TempData,
ViewEngineCollection = controller.ViewEngineCollection,
Views = views
};
}
}
}
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