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I would like to get the html code a view would generate in a string, modify it in my controller, then add it to my JsonResult.
I found code that would do what i'm talking about from a partial. I would like to do it from an aspx View though.
-- Extra explanation:
Let's say I have a page Frame.aspx that /Controller/Frame will return
I would like to get my hand on the response before it out so I can to wrap it with jsonp. I do not wish to edit the return result in code every time, this is why I want to load the view programmatically.
/Controller/Frame currently returns Frame.aspx's content: <html><body>hello</body></html>
Let's say there's a function that renders a view in a string builder
StringBuilder sb = new StringBuilder();
RenderView(sb, "Frame");
now take sb and wrap it with jsonp:
public JsonResult Frame(string callback)
{
StringBuilder sb = new StringBuilder();
RenderView(sb, "Frame");
return new JsonResult
{
Data = "(function() { " + callback + "(" + clientResponse + "); })();"
,
JsonRequestBehavior = JsonRequestBehavior.AllowGet
};
}
739
This works like a charm (got it through SO).
I use it like this:
public class OfferController : Controller
{
[HttpPost]
public JsonResult EditForm(int Id)
{
var model = Mapper.Map<Offer, OfferEditModel>(_repo.GetOffer(Id));
return Json(new { status = "ok", partial = this.RenderPartialViewToString("Edit", model) });
}
}
public static partial class ControllerExtensions
{
public static string RenderPartialViewToString(this ControllerBase controller, string partialPath, object model)
{
if (string.IsNullOrEmpty(partialPath))
partialPath = controller.ControllerContext.RouteData.GetRequiredString("action");
controller.ViewData.Model = model;
using (StringWriter sw = new StringWriter())
{
ViewEngineResult viewResult = ViewEngines.Engines.FindPartialView(controller.ControllerContext, partialPath);
ViewContext viewContext = new ViewContext(controller.ControllerContext, viewResult.View, controller.ViewData, controller.TempData, sw);
// copy model state items to the html helper
foreach (var item in viewContext.Controller.ViewData.ModelState)
if (!viewContext.ViewData.ModelState.Keys.Contains(item.Key))
{
viewContext.ViewData.ModelState.Add(item);
}
viewResult.View.Render(viewContext, sw);
return sw.GetStringBuilder().ToString();
}
}
}
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