I've been using Html.Action("ActionName", "ControllerName") to invoke child actions across controllers without needing to have the view in Views\Shared. This has been working great for displaying things like session or cookie information.
Instead of just accessing cookies, I would like to pass additional parameters to Html.Action("ActionName", "ControllerName") so the action can execute different code based on the the data passed to the original view.
Should I be using a different method to pass parameters to a child action in a different controller? How would one accomplish this?
You could specify additional data in the RouteValues property like this.
Html.Action("ActionName","Controller", new { id = 1 })
To add a little on this question, I am using ASP.Net MVC 5 and I could succeed to achieve this with this code:
#Html.Action("foo",new {parameter1=1})
Related
I need to get some Json to the client side from the server and it's somewhat troublesome as almost all tutorials assume an Ajax call to a separate action to get the Json.
This led me to think that there must be some reason why it is done this way. In Asp.Net MVC we can pass a Model along with the view to get the information but we can't seem to easily pass a Json object. Instead you are supposed to make a separate call to get this information.
What if the Json info is known when the page is generated, why not generate it at the same time?
I'm sorry if I wasn't clear enough. While it's nice to hear of ways to get Json to the client, the question is actually whether there is a specific reason the Ajax call method is much more popular, like security or anything like that.
Can you put something like this into your view? (rough pseudo code, assuming using a Razor view)
< script >
var myJSON = { Field: #model.Field, Field2: #model.Field2 };
< /script >
Because you do not need both at the same time... on the first call will be to get html (the view of the data - represented by a view model), and any ajax calls will be to get the possibly updated data (json serialized view model).
No reason why you can't. You could use the javacript serializer to create a JSON string that drop on the page. You could also create an action that return the json string that you called from a script tag.
What you want if you're using KnockOut, would be the Mapping plugin that turns an ordinary JS object, like that generated above, into an observable ready for KnockOut to use. See here from info. http://knockoutjs.com/documentation/plugins-mapping.html
You can use content-negotiation by setting accept header. This is considered a best practice (and according to some RESTful).
This needs to be supported and implemented at server as well. ASP NET MVC does not make it easy to support content-negotiation and you have to implement it yourself by if-else or using ActionFilter and implementing action selector.
I need to do trim to all HTTP POST data submitted by users through web forms. Having done googling, apparently there is no in-built functionality in asp.net to trim all HTTP POST data.
The closest that I can get is what is described here: ASP.NET MVC: Best way to trim strings after data entry. Should I create a custom model binder?
Unfortunately it doesn't work on nested ViewModels (ViewModel with property with type of other ViewModel).
What is the best way to achieve this? I don't want to do property.Trim() on every properties in all ViewModel. Thank you.
One option is to define your own IValueProvider. I would start by inheriting from NameValueCollectionValueProvider to make a TrimmedNameValueCollectionValueProvider in which you trim the results as you pull them out. Then you would defined a TrimmedFormValueProvider that passes in controllerContext.HttpContext.Request.Form as the collection.
In asp.net mvc3, I've got a few local variables in one of the controller, is there any neat way to pass all these variables to view? Something like "locals()" in python?
You will have to explicitly pass them to the view - using a view model.
I have an action-method in a controller that takes requests coming from a variety of different views.
It is somewhat of a utility method and I simply want it to accept the parameters it is given - do something - and then refresh the view that sent the request.
Right now, the only way I see to do this is by having the method figure out what view sent it the info and do a:
return RedirectToAction("method", "controller");
For each possibility (or something similar to that).
Is there a more general way I can make my method just re-render the current view without having to explicitly identify it?
-Thanks
Your best bet is to use jQuery to post the data then utilize the results as you see fit. Otherwise you can pass in the action/controller name in the post and use them dynamically to redirect.
I'm looking for some advice on storing views in a data-store (database, file, other) and display them based on routing data, all using ASP.NET MVC 2 and ASP.NET Routing.
For example, I'd like to be able to display different views based on the following route data:
/{country}/
/{country}/{area}
But in the same vein I'd like to display:
/{planet}/
/{planet}/{satellite}
All are based on strings, and the data isn't fixed. So based on the number of segments maybe, use that as the selection criteria into the data-store...additionally, I may not know the segments up front, so they'd all be dynamic.
I'm was hoping we could get a few different methods together here, as kind of a reference for all - I'm sure some methods won't suite everyone...
So, how would you do it?
Branislav Abadjimarinov suggested a Controller Factory which could be used to do the look-up and display the page dynamically. I like this idea, what do you think?
There is no way for MVC to understand from this url's which route to choose. You have to make the routes more specific. For example:
/planet/{planet}/{satelite}
/country/{country}/{area}
You also have the option to define your own controller factory. The controller factory decides which controller to instantiate based on the route. So you can put some custom logic in it like - check if the {planet} parameter exist and if yes instantiate Planet controller else instantiate Countries controller.
This Post could be really helpful for you.
Remember you always can add a new routing rule : )
Just like this