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Trying to Get Data using Ajax call to Controller method MVC My code Attached

I am calling jquery function on dropdown value change jquery method is ,
function MyFunction() {
alert($('#DDlSurvey').val());
$.ajax({
url: "#Url.Action("GetSelectedQuestion", "ConductSurveyController")",
data: { prefix: $('#DDlSurvey').val() },
type: "GET",
dataType: "json",
success: function (data) {
// loadData(data);
alert(data)
alert("Success");
},
error: function () {
alert("Failed! Please try again.");
}
});
//$('#YourLabelId').val('ReplaceWithThisValue');
}
</script>
Function I'm calling and I am getting dropdown value alert
Now, Function that I am calling is "GetSelectedQuestion" in controller "ConductSurveyController"
Method is like ,
[HttpPost]
public JsonResult GetSelectedQuestion(int prefix)
{
List<SelectList> Questions=new List<SelectList>();
// Here "MyDatabaseEntities " is dbContext, which is created at time of model creation.
SurveyAppEntities ObjectSur = new SurveyAppEntities();
// Questions = ObjectSur.Surveys.Where(a => a.ID.Equals(prefix)).toToList();
I don't think this method is calling as I am getting error
"Failed! Please try again"
From my script.
Hopes for your suggestions
Thanks
var e = from q in ObjectSur.Questions
join b in ObjectSur.SurveyQuestions on q.ID equals b.QuestionID where b.SurveyID.Equals(prefix)
select q ;
return new JsonResult { Data = e, JsonRequestBehavior = JsonRequestBehavior.AllowGet };
}

I think you are using controller name straight forward. your ajax code be something like this.
var PostData= { prefix: $('#DDlSurvey').val() }
var ajaxOptions = {
type: "GET",
url: '#Url.Action("GetSelectedQuestion", "ConductSurvey")',//Actionname, ControllerName
data: PostData,
dataType: "json",
success: function (result) {
console.log(result);
},
error: function (result) {
}
};
$.ajax(ajaxOptions);

Your method in your controller is decorated with HttpPost, while in your ajax you have specified the type of your request is get . You can either change your method to get like this:
[HttpGet]
public JsonResult GetSelectedQuestion(int prefix)
{
}
Or change your request type to post in your Ajax call:
$.ajax({
url: "#Url.Action("GetSelectedQuestion", "ConductSurveyController")",
data: { prefix: $('#DDlSurvey').val() },
type: "Post",
Also the Controller is redundant in ConductSurveyController, you need to remove it and simply call it as ConductSurvey:
url: '#Url.Action("GetSelectedQuestion", "ConductSurvey")',

Passing arguments in jQuery post to a method in controller

In ASP.NET MVC I was using this script to call a method in controller:
<script>
$.ajax({
url: '#Url.Action("getBookedByUser", "Home")',
data: "2",
dataType: "html",
success: function (data) {
$('#someElement').html(data); // add the returned html to the DOM
console.log(data);
},
});
</script>
and this is the method I call:
public async Task getBookedByUser(string id)
{
BenchesService benchService = new BenchesService();
List<Bench> obj = await benchService.getLastBenchByUser(id);
userBench = obj.ElementAt(0);
}
My problem is that id in my controller method is null. It doesn't assume the value "2" as I intend.
Any idea why?

You're almost there. You need to setup the JSON to include your id property:
$.ajax({
url: '#Url.Action("getBookedByUser", "Home")',
data: { id: '2' },
dataType: "html",
success: function (data) {
$('#someElement').html(data); // add the returned html to the DOM
console.log(data);
},
});

use json data created via javascript with ajax.actionlink

I want to be able to post json data that was created via a javascript function through the Ajax.ActionLink helper.
I am able to accomplish this through straight jQuery code, but I am going to be doing this in a lot of places and wanted to see if there was a more efficient way to do it within MVC.
Working jQuery code:
$(function () {
$("#delete-selected").click(function () {
var ids= getSelected('ItemGrid'); //this returns a string[]
var postData = { Ids: courseIds };
var url = '/Home/DeleteSelected';
$.ajax({
url: url,
traditional: true,
type: "Post",
dataType: 'json',
data: postData
});
});
});

Write a script that uses unobtrusive JavaScript hooks like data- attributes to store the settings.
HTML:
<div data-ajax-url='/Home/DeleteSelected'
data-ajax-post-data='{function name or json content}'>
....
</div>
JQuery Plugin
$(document).on("click","[data-ajax-url]", function(){
var postData = $(this).data("ajax-post-data");
var url = $(this).data("ajax-url");
$.ajax({
url: url,
traditional: true,
type: "Post",
dataType: 'json',
data: postData
});
}

If you are doing an ajax call and want to update html with MVC, I would normally return Partial View from my call.Then update the html of the current holder with the result
Server Side
public ActionResult DeleteSelected(int[] Ids)
{
//do something
MyModel model = new Model(); //create object with new data
return Partial("_PartialViewName", model);
}
Javascript
$("#delete-selected").click(function () {
var ids= getSelected('ItemGrid'); //this returns a string[]
var postData = { Ids: courseIds };
var url = '/Home/DeleteSelected';
$.ajax({
url: url,
traditional: true,
type: "Post",
dataType: 'html',
data: postData
success: function(result){
$('#MyPartialViewContainer').html(result);
}
});
});

Making an Ajax call to a partial view after ajax success

I have a partial view that contains all my buttons and it needs to display updated values after a form is submitted. At the submission I already have it rendering another partial view, is there a way to make it work where on success of that one being rendered it re-renders. Here is the code I am trying to get to work now based on what I've seen in other places.
jQuery in my view:
<script type="text/javascript" charset="utf-8">
$(document).ready(function () {
$('#ChangeGrade').click(function (e) {
var tdata = $('#form1').serialize();
var origname = $('#HeatGradeDiv').find('input[name="grade"]').first().val();
var newname = $('#HeatGradeDiv').find('input[name="updatedGrade"]').first().val();
var heatname = $('#HeatGradeDiv').find('input[name="hiddenHeat"]').first().val();
$.ajax({
type: "POST",
data: {
mCollection: tdata,
grade: origname,
updatedGrade: newname,
hiddenHeat: heatname
},
url: '#Url.Action("ChangeGrade","Home")',
success: function (result) { success(result); }
});
});
function success(result) {
$('#HeatGradeDiv').dialog('close');
$("#Partial_Chem_Analysis").html(result);
//ajax call I'm trying to get working
$.ajax({
type: "POST",
url: "/Home/ButtonsPartial",
success: function (result2) { $("#ButtonsPartial").html(result2); }
});
}
});
</script>
Here is the controller method I'm calling. When I run it now it is not getting hit.
public ActionResult ButtonsPartial()
{
ButtonsModel B = new ButtonsModel();
B.GetData(searchQ);
return PartialView(B);
}
Any help is appreciated.

If you attach it to a debugger such as (chrome developer tools or firebug) are you seeing any http or js errors?
It looks like you might need to make it a GET rather than POST...
$.ajax({
type: "GET",
url: "/Home/ButtonsPartial",
success: function (result2) { $("#ButtonsPartial").html(result2); }
});

Calling a C# method with jquery

I am trying to call a method with jQuery on a button click.This is waht I have so far:
$("a.AddToCart").click(function () {
var link = document.URL;
$.ajax({
type:"POST",
url: "/Account/AddToCartHack",
data: {url : link},
contentType: "application/json; charset=utf-8",
dataType: "json"
});
});
[WebMethod]
public void AddToCartHack(string url)
{
GeneralHelperClass.URL = url;
}
What I am trying to do here is when I click the link with class add to cart I want to call the method AddToCartHack and pass it the curent URL as a parameter.
I must be doing something wrong because it seems that AddToCartHack is not being called.
What am I doing wrong?

There are quite a lot of issues with your code, I don't know where to start. So let's conduct an interactive refactoring session with you (if you don't care about my comments but just want to see the final and recommended solution, just scroll down at the end of answer).
First: you don't seem to be canceling the default action of the anchor by returning false from the .click() event handler. By not doing this you are actually leaving the browser perform the default action of the anchor (which as you know for an anchor is to redirect to the url that it's href attribute is pointing to. As a consequence to this your AJAX call never has the time to execute because the browser has already left the page and no more scripts are ever running). So return false from the handler to give your AJAX script the possibility to execute and stay on the same page:
$("a.AddToCart").click(function () {
var link = document.URL;
$.ajax({
type:"POST",
url: "/Account/AddToCartHack",
data: {url : link},
contentType: "application/json; charset=utf-8",
dataType: "json"
});
return false;
});
Second: You have specified contentType: 'application/json' request header but you are not sending any JSON at all. You are sending a application/x-www-form-urlencoded request which is the default for jQuery. So get rid of this meaningless parameter in your case:
$("a.AddToCart").click(function () {
var link = document.URL;
$.ajax({
type:"POST",
url: "/Account/AddToCartHack",
data: {url : link},
dataType: "json"
});
return false;
});
Third: You have specified that your server side code will return JSON (dataType: 'json') but your server side code doesn't return anything at all. It's a void method. In ASP.NET MVC what you call C# method has a name. It's called a controller action. And in ASP.NET MVC controller actions return ActionResults, not void. So fix your contoller action. Also get rid of the [WebMethod] attribute - that's no longer to be used in ASP.NET MVC
public class AccountController: Controller
{
public ActionResult AddToCartHack(string url)
{
GeneralHelperClass.URL = url;
return Json(new { success = true });
}
}
Fourth: you have hardcoded the url to the controller action in your javascript instead of using server side helpers to generate this url. The problem with this is that your code will break if you deploy your application in IIS in a virtual directory. And not only that - if you decide to modify the pattern of your routes in Global.asax you will have to modify all your scripts because the url will no longer be {controller}/{action}. The approach I would recommend you to solve this problem is to use unobtrusive AJAX. So you would simply generate the anchor using an HTML helper:
#Html.ActionLink(
"Add to cart",
"AddToCartHack",
"Account",
null,
new { #class = "AddToCart" }
)
and then unobtrusively AJAXify this anchor:
$('a.AddToCart').click(function () {
var link = document.URL;
$.ajax({
type: 'POST',
url: this.href,
data: { url : link }
});
return false;
});
Fifth: You seem to be employing some document.URL variable inside your .click() handler. It looks like some global javascript variable that must have been defined elsewhere. Unfortunately you haven't shown the part of the code where this variable is defined, nor why is it used, so I cannot really propose a better way to do this, but I really feel that there's something wrong with it. Or oh wait, is this supposed to be the current browser url??? Is so you should use the window.location.href property. Just like that:
$('a.AddToCart').click(function () {
$.ajax({
type: 'POST',
url: this.href,
data: { url : window.location.href }
});
return false;
});
or even better, make it part of the original anchor (Final and recommended solution):
#Html.ActionLink(
"Add to cart",
"AddToCartHack",
"Account",
new { url = Request.RawUrl },
new { #class = "AddToCart" }
)
and then simply:
$('a.AddToCart').click(function () {
$.ajax({
type: 'POST',
url: this.href
});
return false;
});
Now that's much better compared to what we had initially. Your application will now work even with javascript disabled on the page.

place script method this way as shown below
[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]

Add Success and error function to check your ajax functionality
...
$.ajax({
type:"POST",
url: "/Account/AddToCartHack",
data: {url : link},
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(){
alert('success');
},
error:function(){
alert('error');
}
});
....

If this is Asp.Net webforms you will need to make the webmethod static or the method cannot be accessed through JavaScript.

$(document).ready(function () {
$.ajax({
url: "Testajax.aspx/GetDate",
data: "f=GetDate",
cache: false,
success: function (content) {
$('#tableData').append('My Dear Friend');
alert(content);
},
failure: function (response) {
alert("no data found");
}
});
});