I have the requirement to use Html.RenderAction like you would in ASP.NET MVC.
For instance I have a Home Page with News and Products on.
I would like to do for instance
#Html.RenderAction("/api/products/featured")
Which would start a new service call and output the template to the html stream.
Is this possible using ServiceStack Razor and if so how do I accomplish it?
The PartialExamples.cshtml test page shows different examples of rendering a razor view inside a page, e.g:
Using the new RenderToAction() method which lets you execute a Service and it's rendered partial view with a route and QueryString, e.g:
#Html.RenderAction("/products/1")
This also takes an optional view name if you want a different view than the default:
#Html.RenderAction("/products/1", "CustomProductView")
There's also the normal Html.Partial() to specify which view and model you want to render in the page, e.g:
#Html.Partial("GetProduct",
base.ExecuteService<ProductService>(s => s.Any(new GetProduct { Id = 1 })))
ExecuteService is simply a wrapper around the equivalent ResolveService in a using statement, i.e:
#{
Response response = null;
using (var service = base.ResolveService<ProductService>())
{
response = service.Any(new GetProduct { Id = 1 });
}
}
#Html.Partial("GetProduct", response)
The new RenderToAction() method in Razor Views was added in v4.0.34+ which is now available on MyGet.
*I may be duplicating my answer or I lost it somehow
Looking at the ServiceStack.Razor.ViewPage class there is an Html property of type ServiceStack.Html.HtmlHelper. I don't see 'RenderAction' as a method (or extension method) on this class so it doesn't appear to be available. There is a 'Partial' method that takes the ViewName and an overload that takes a ViewName and an object. Based on your above comment this doesn't appear to be a useful solution.
If I'm correct about the above, I think you'd need your 'Featured View Template' to pull in the data. Could add soemthing like
{ FeaturedResponse products = new JsonServiceClient("http://localhost").Get<FeaturedResponse>("/api/products/featured"); }
to your template. This would allow you to use the products variable like a Model.
Or, use JavaScript to pull the data into the template. You would have have to use JavaScript to get your data into the HTML elements, though.
You could then render the template using #Html.Partial('Featured')
Hope this helps.
Related
lets say I want to a partial view like the following sample
#Html.RenderAction("ListDocuments", "MultiFileAttachments", new { id = jsparameter });
in the jsparameter I want to pass as a parameter that is the result of a javascript function. Maybe this is not logical because javascript runs on the client, but how can I achieve a similar functionality ? thank you in advance
If you need to call a part of a page based on some actions or values determined by actions on the client side, then you should think to use JavaScript (preferably jQuery) and Ajax.
Through jQuery-Ajax, you could easily call a Partial view through the Contoler and since it's a regular HTTP request, you would be able to pass all the parameters you need.
Using code as :
#Html.RenderAction("ListDocuments", "MultiFileAttachments", new { id = jsparameter });
is not possible since it is rendered by the server before it's sent to the client browser.
I have a partialview in _Layout.cshtml that I only want to display for certain urls.
My first thought was in my partial I would use a string as the model #model String .
In the actionmethod that is called I would return this
return PartialView("_MyPartial", new string{Request.FilePath});
In the partial I would have an if block wrapping my outer div that would check the model to see if the url it contained was the url that can display the partial.
I don't like this way because I would have to hardcode the url in if block check
#if( Model == "/Test/Home")
{
<div>
Just an example
</div>
}
What would be the best way to do this?
Thanks
You shouldn't need to use hard coded strings, even if you did the validation within your view like you initially intended.
You can use
Request.Url.AbsolutePath
to get your current url and
Url.Action("action", "controller")
to generate the inacceptable locations.
That said, I would keep your logic determining whether to show the partial view within your controller.
if(showPartialView)
return PartialView("_MyPartial");
else
return new EmptyResult();
Deciding actions based on the request is the responsibility of the Controller. Since the controller chooses the view, why not have it choose the partial as well? Figure out what, if any, partial you want in your controller, and pass it to the view on your view model.
I've been playing around with ASP.NET MVC 4 beta and I noticed two controllers: one(web api controller) to return data and the other(default controller) to return views.
I'm aware that even HTML is a type of representation for a resource like JSON or XML and I'm not personally so happy having a separate controller to return only HTML representation.
What I'm trying to achieve is having a single controller that will return both views and data. But I'm confused is this a best option and if it is how can I achieve this without much code.
Can I extend the ApiController such that it will return both views as well as data or can I create a generic controller that by passes the requests to particular controller type based upon the "accept-type".
I'm looking for your valuable suggestions.
Write a formatter rendering your HTML.
The official Contact Manager example describes how to use formatters to render in any of the following html/json/png/vcf within a single controller.
You'll have to add the valid routes, if you want to explicitly request within the url.
config.Routes.MapHttpRoute(
"Default", // Route name
"{controller}/{id}/{ext}", // URL with parameters
new { id = RouteParameter.Optional, ext = RouteParameter.Optional } // Parameter defaults
);
But if you are actually setting the "accept-type" header, that should pretty much work out of the box
I want a partial view that display some stuff from a website that is not under my control.
The data on the website is only available through HTML, and thus I can only retrieve it by querying the web site and parsing the HTML. (The website holds a list of 50 elements, and I only want the top 10.)
Now, the data from the website is not changing very frequently, so I imagine that I can retrieve the HTML on an hourly basis, and displaying a cached version on my web site.
How can I accomplish this in ASP.NET MVC 3?
Ignoring the MVC3 requirement for now, you should look to using WebClient to grab the html from the website. You can do something like:
var client = new WebClient();
var html = Encoding.UTF8.GetString(client.DownloadData("http://www.somedomain.com"));
If you need to tailor your request, I'd recommend looking at HttpWebRequest, HttpWebResponse. Now that you can grab the html, you need to consider your caching mechanism, possibly in the ASP.NET runtime?
public ActionResult GetHtml()
{
if (HttpRuntime.Cache["html"] == null)
GetHtmlInternal();
return Content((string)HttpRuntime.Cache["html"], "text/html");
}
private void GetHtmlInternal()
{
var html = // get html here.
HttpRuntime.Cache.Insert("html", html, null, DateTime.Now.AddMinutes(60), Cache.NoSlidingExpiration);
}
The first solution that comes to mind is to create an action in a controller that makes an Http request to the remote web page and parses the html you want to return to your own page and then set output caching on your action.
Edit:
What controller to put the action in would depend on the structure of your web site and whether the partial view would be visible on all views or just a specific view. If the partial is visible in all views I'd either place it in the Home controller or create a "General" controller (if I anticipated more actions would go in such a controller).
If you want to manipulate the result I would probably make a model and partial view for the list. If you want to take a part of the returned html and output it as it is I would use the same method as in the answer by Matthew Abbott:
return Content(yourHtmlString);
The end would look something like this:
[OutputCache(Duration = 3600)]
public ActionResult RemoteList()
{
var client = new WebClient();
var html = Encoding.UTF8.GetString(client.DownloadData("http://www.somedomain.com"));
// Do your manipulation here...
return Content(html);
}
(Some of the above code was borrowed from the post by Matthew Abbott.)
You could just add OutputCache attribute on your action and set OutputCache.Duration Property to 3600 seconds (1 hour)
I have an actionlink that on click im passing a List of objects to a controller action.
Example:
View:
Html.ActionLink("TestLink", "TestMethod", "Test", Model.SampleList, null)
TestController:
public ActionResult TestMethod(List<SampleList> sampleList)
{
return View(sampleList);
}
When I do this I get a null sampleList. I can pass a single complex object fine just not a collection of it. Do I need the correct routing for this? The reason I'm doing this is instead of passing an id and do a look up in the controller action, I just pass in the data.
It is possible when you perform a form post, have a look at this blog post for more information. You'll probably not be able to use one of the HtmlHelper methods though, the post states:
Currently, we don’t have any helpers
for generating the form, so this is a
very manual process.
Nothing prevents you from writing your own helper though.