ASP Net MVC Calling a method from a view

Question

In my MVC app the controller gets the data  model  from an external API  so there is no model class being used  and passes that to the view  The data  model  has a container in which there are several objects with several fields  string values   One view iterates over each object and calls another view to draw each of them  This view iterates over the fields  string values  and draws them   Here s where it gets tricky for me  Sometimes I want to do some special formatting on the fields  string values   I could write 20 lines of code for the formatting but then I would have to do that for each and every field and that would just be silly and oh so ugly  Instead I would like to take the field  string value   pass it to a method and get another string value back  And then do that for every field   So  here s my question   How do I call a method from a view   I realize that I may be asking the wrong question here  The answer is probably that I don t  and that I should use a local model and deserialize the object that I get from the external API to my local model and then  in my local model  do the  special formatting  before I pass it to the view  But I m hoping there is some way I can call a method from a view instead  Mostly because it seems like a lot of overhead to convert the custom object I get from the API  which in turns contains a lot of other custom objects  into local custom objects that I build  And also  I m not sure what the best way of doing that would be   Disclaimer  I m aware of the similar thread  ASP NET MVC  calling a controller method from view   ASP NET MVC  calling a controller method from view  but I don t see how that answers my question

User · Answer

You can implement a static formatting method or an HTML helper, then use this syntaxe :

@using class_of_method_namespace
...
// HTML page here
@className.MethodName()

or in case of HTML Helper

@Html.MehtodName()

User · Answer

You should create custom helper for just changing string format except using controller call

User · Answer

You should not call a controller from the view    Add a property to your view model  set it in the controller  and use it in the view   Here is an example   MyViewModel cs   public class MyViewModel             public bool ShowAdmin   get  set        MyController cs   public ViewResult GetAdminMenu                 MyViewModelmodel   new MyViewModel                         model ShowAdmin   userHasPermission  Admin              return View model           MyView cshtml    model MyProj ViewModels MyViewModel    if   Model ShowAdmin        lt  -- admin links here-- gt         Views Shared   Layout cshtml        using MyProj ViewModels Common            lt div gt               Html Action  GetAdminMenu    Layout        lt  div gt

User · Answer

This is how you call an instance method on the Controller          HomeController this ViewContext Controller  Method1        This is how you call a static method in any class          SomeClass Method        This will work assuming the method is public and visible to the view

User · Answer

Controller not supposed to be called from view  That s the whole idea of MVC - clear separation of concerns   If you need to call controller from View - you are doing something wrong  Time for refactoring

User · Answer

Building on Amine s answer  create a helper like   public static class HtmlHelperExtensions       public static MvcHtmlString CurrencyFormat this HtmlHelper helper  string value                var result   string Format   0 C2    value           return new MvcHtmlString result             in your view  use  Html CurrencyFormat model value   If you are doing simple formating like Standard Numeric Formats  then simple use string Format   in your view like in the helper example above    string Format   0 C2    model value

User · Answer

I tried lashrah s answer and it worked after changing syntax a little bit  this is what worked for me          HomeController this ViewContext Controller  Method1

User · Answer

why You don t use Ajax to   its simple and does not require page refresh and has success and error callbacks  take look at my samlpe   lt a id  ResendVerificationCode   gt  Resource en ResendVerificationCode lt  a gt    and in JQuery       ResendVerificationCode   on  click   function                     getUserbyPhoneIfNotRegisterd     phone   val            and this is my ajax which call my controller and my controller and return object from database  function getUserbyPhoneIfNotRegisterd userphone                     ajax                       type   GET                       dataType   Json                       url    Url Action  GetUserByPhone    User        phone     userphone                      async  false                      success  function data                            if  data    null    data data    null                                ErrorMessage       Resource en YourPhoneDoesNotExistInOurDatabase                              else                               user   data Object keys data  0                                    AddVereCode user ID     anather Ajax call                                  SuccessMessage  Done     Resource en VerificationCodeSentSuccessfully    Done                                                                         error  function                             ErrorMessage       Resource en ErrorOccourd

[c#] ASP.Net MVC: Calling a method from a view

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