Making a Simple Ajax call to controller in asp net mvc

Question

I m trying to get started with ASP NET MVC Ajax calls   Controller   public class AjaxTestController   Controller                 GET   AjaxTest      public ActionResult Index                 return View               public ActionResult FirstAjax                 return Json  chamara   JsonRequestBehavior AllowGet                View    lt head runat  server  gt       lt title gt FirstAjax lt  title gt       lt script src  http   code jquery com jquery-1 9 1 js  gt  lt  script gt       lt script src  http   ajax googleapis com ajax libs jquery 2 0 0 jquery min js  gt  lt  script gt       lt script type  text javascript  gt            document  ready function                  var serviceURL     AjaxTest FirstAjax                  ajax                   type   POST                   url  serviceURL                  data  param                       contentType   application json  charset utf-8                   dataType   json                   success  successFunc                  error  errorFunc                              function successFunc data  status                         alert data                              function errorFunc                     alert  error                                   lt  script gt   lt  head gt    I just need to print an alert with the controller method returning data  Above code just print  chamara  on my view  An alert is not firing   UPDATE  I modified my controller as below and it start working  I don t have an clear idea why it s working now  Some one please explain  The parameter  a  does not related i added it because i can not add two methods with same method name and parameters I think this might not be the solution but its working  public class AjaxTestController   Controller                             GET   AjaxTest           HttpGet          public ActionResult FirstAjax                         return View                        HttpPost          public ActionResult FirstAjax string a                        return Json  chamara   JsonRequestBehavior AllowGet

User · Answer

Remove the data attribute as you are not POSTING anything to the server (Your controller does not expect any parameters).

And in your AJAX Method you can use Razor and use @Url.Action rather than a static string:

$.ajax({
    url: '@Url.Action("FirstAjax", "AjaxTest")',
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: successFunc,
    error: errorFunc
});

From your update:

$.ajax({
    type: "POST",
    url: '@Url.Action("FirstAjax", "AjaxTest")',
    contentType: "application/json; charset=utf-8",
    data: { a: "testing" },
    dataType: "json",
    success: function() { alert('Success'); },
    error: errorFunc
});

User · Answer

If you just need to hit C  Method on in your Ajax Call you just need to pass two matter type and url if your request is get then you just need to specify the url only  please follow the code below it s working fine   C  Code        HttpGet      public ActionResult FirstAjax                 return Json  chamara   JsonRequestBehavior AllowGet              Java Script Code if Get Request        ajax           url   home FirstAjax           success  function responce   alert responce data            error  function responce   alert responce data             Java Script Code if Post Request and also  HttpGet  to  HttpPost             ajax               url   home FirstAjax               type  POST               success  function responce   alert responce                error  function responce   alert responce                 Note  If you FirstAjax in same controller in which your View Controller then no need for Controller name in url  like url   FirstAjax

User · Answer

instead of url  serviceURL   use  url    lt    serviceURL  gt      and are you passing 2 parameters to successFunc   function successFunc data        alert data

User · Answer

Add  JsonValueProviderFactory  in global asax    protected void Application Start         AreaRegistration RegisterAllAreas        ValueProviderFactories Factories Add new JsonValueProviderFactory

User · Answer

First thing there is no need of having two different versions of jquery libraries in one page either  1 9 1  or  2 0 0  is sufficient to make ajax calls work    Here is your controller code       public ActionResult Index                 return View               public ActionResult FirstAjax string a                return Json  chamara   JsonRequestBehavior AllowGet              This is how your view should look like    lt script src  http   ajax googleapis com ajax libs jquery 2 0 0 jquery min js  gt  lt  script gt    lt script type  text javascript  gt    document  ready function          var a    Test         ajax           url         Home FirstAjax           type   GET           data    a   a            success  function  response                alert response                      error  function  response                alert response                          lt  script gt

User · Answer

View       ajax           type   GET           cache  false          url    Login Method           dataType   json           data                error  function                         success  function  result                alert  success                       Controller Method    public JsonResult Method         return Json new JsonResult                    Data    Result           JsonRequestBehavior AllowGet

User · Answer

Use a Razor to dynamically change your URL by calling your action like this     ajax       type   POST       url    Url Action  ActionName    ControllerName         contentType   application json  charset utf-8       data    data   yourdata         dataType   json       success  function recData    alert  Success           error  function     alert  A error

User · Answer

After the update you have done     its first calling the FirstAjax action with default HttpGet request and renders the blank Html view    Earlier you were not having it   later on  loading of DOM elements of that view your Ajax call get fired and displays alert    Earlier you were only returning JSON to browser without rendering any HTML  Now it has a HTML view rendered where it can get your JSON Data    You can t directly render JSON its plain data not HTML

User · Answer

It s for your UPDATE question   Since you cannot have two methods with the same name and signature you have to use the ActionName attribute   UPDATE    HttpGet  public ActionResult FirstAjax         Some Code--Some Code---Some Code     return View        HttpPost   ActionName  FirstAjax    public ActionResult FirstAjaxPost         Some Code--Some Code---Some Code     return View        And please refer this link for further reference of how a method becomes an action  Very good reference though

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