Develop Reference

Calling [HTTPPost] from Javascript ASP.NET

I am using a method in my controller which imports data from an API. This method I am wanted to be called from two locations. First the view (currently working) and secondly a javascript function.
Start of controller method:
[ActionName("ImportRosters")]
[HttpPost]
public ActionResult PerformImportRosterData(int id, int? actualLength, int? rosterLength)
{
var authenticator = Authenticator(id);
var rosters = authenticator.Api().RosterData().ToDictionary(x => x.Id);
var databaseRosterDatas = SiteDatabase.DeputyRosterData.Where(x => x.SiteID == id)
.ToDictionary(x => x.Id);
Javascript Function:
$("#btnDeputyRunNowUpdate").click(function() {
$("#btnRunDeputyNow").modal("hide");
ActualLength = $("#actualRunLength").val();
RosterLength = $("#rosterRunLength").val();
$.ajax({
type: "POST",
url: "/deputy/PerformImportRosterData",
data: { SiteIDRoster, ActualLength, RosterLength }
});
SiteIDRoster = null;
location.reload();
$("#btnRunDeputyNow").modal("hide");
toast.show("Import Successful", 3000);
});
All values are being set but i am getting a 404 error on the url line
POST https://example.org/deputy/PerformImportRosterData 404 ()
I need a way to be able to call this c# method from both html and JS

This can be done if you will modify the URL in your AJAX. It should look something like
url: '<%= Url.Action("YourActionName", "YourControllerName") %>'
or
url: #Url.Action("YourActionName", "YourControllerName")
one more thing, I don't see if you do anything with the result of the call. your script does not have success part
success: function(data) {//do something with the return}
and would be very helpful to have error handler in your call.
full example on how AJAX should look like:
$.ajax({
url: "target.aspx",
type: "GET",
dataType: "html",
success: function (data, status, jqXHR) {
$("#container").html(data);
alert("Local success callback.");
},
error: function (jqXHR, status, err) {
alert("Local error callback.");
},
complete: function (jqXHR, status) {
alert("Local completion callback.");
}
})
For a good tutorial on AJAX read this document
Change after Comment:
my current code is below:
$("#btnDeputyRunNowUpdate").click(function() {
$("#btnRunDeputyNow").modal("hide");
ActualLength = $("#actualRunLength").val();
RosterLength = $("#rosterRunLength").val();
$.ajax({
type: "POST",
url: '<%= Url.Action("PerformImportRosterData", "DeputyController") %>',
data: { SiteIDRoster, ActualLength, RosterLength },
success: function(data) {
console.log(data);
console.log("TESTHERE");
}
});
}
UPDATE:
Noticed one more thing. Your parameters in the controller and AJAX do not match. Please try to replace your a few lines in your AJAX call with:
url: "/deputy/PerformImportRosterData",
data: { id: yourIDValue, actualLength: youractualLengthValue,
rosterLength :yourrosterLengthValue }
remember to set all variable values in javascript , if they have no values set them = to null.
Can you try copy paste code below
$.ajax({
type: "POST",
url: "/deputy/PerformImportRosterData",
data: { SiteIDRoster:999, ActualLength:1, RosterLength:2 }
});
And let me know if it wall cause any errors.

After attempting to solve for a few days, I created a workaround by creating two methods for importing the data. one for the httpPost and the second for import calling from javascript.
Not a great solution but it works. Thanks for your help Yuri

Call a php function with ajax variables using Silex framework (500 Internal Server Error)

I have two select lists in html and I would like to call a php function each time one value of both of these list changes. I already made the javascript file using ajax to get these values for each change. Now I would like to use these values to call my function each time there is a change as well. I'm using a POST request and a post route to get my data.
Here is my ajax.js file :
var year = $('#year option:selected').text();
var site = $('#site option:selected').val();
$.ajax({
type: 'POST',
url: 'previsionnel',
data: {
'year': year,
'site': site
},
success: function (data) {
$('#annualBudget').html(data);
},
error: function () {
alert('error');
}
});
$('#year, #site').change((function () {
$('#year').attr('selected');
$('#site').attr('selected');
var year = $('#year option:selected').text();
var site = $('#site option:selected').val();
$.ajax({
type: 'POST',
url: 'previsionnel',
data: {
'year': year,
'site': site
},
success: function (data) {
$('#annualBudget').html(data);
},
error: function () {
alert('error');
}
});
}));
Here is the routes.php file and the route where I call my function :
$app->post('/previsionnel', function (Request $request) use ($app) {
$year = $request->request->get('year');
$site = $request->request->get('site');
$app['dao.annualBudget']->getAnnualBudgetByYearAndSite($year, $site);
//return $app['twig']->render('previsionnel.html.twig', array('annualBudget' => $annualBudget));
});
For this code I have an 500 Internal Server Error for each POST requests made. After researches, I think I did an error somewhere or that's might be a server problem somehow. I want you to know that I'm not exactly sure it works this way so I might be wrong about how to get my data and then call my function.

Getting an AJAX GET request to work with Express.js

I am using node.js and Express.js on the back end, and am trying to make a server call from the client via AJAX.
So I have this POST request that works fine with AJAX:
node.js/Express.js:
app.post('/createNewThing', function(req, res) {
var userInput = req.body.userInput;
if (userInput) {
res.send('It worked!');
}
});
Client Side/AJAX request:
var userInputForm = $('#userInputForm.val()')
$.ajax({
url: "/createNewThing",
type: "POST",
data: "userInput=" + userInputForm,
dataType: "text",
success: function(response, status, http) {
if (response) {
console.log('AJAX worked!);
}
}
});
The userInputForm comes from an HTML form.
This POST request works fine. But I want to change this to a GET request. If I change app.post to app.get, and change type in the AJAX call to GET, I get this 500 error:
GET /createNewThing?userInput= 500

When you make a GET request, the data appears in the query string (of the URL in the request headers). It doesn't appear in the request body. There is no request body.
When you try to read from the request body, you are trying to access a property of an undefined object, which triggers an exception and cause an internal server error.
This answer explains how to read a query string:
var id = req.query.id; // $_GET["id"]
So
var userInput = req.query.userInput;

I think var userInputForm = $('#userInputForm.val()') will get error or get wrong data..This may be the reason for the error. Due to userInputForm may not be a string and concatenate with userInput=
Actually it is bad data.
And for the data in ajax, you should modify data from data: "userInput=" + userInputForm,
to:
data: {
userInput: userInputForm
},
dataType: "json"
And var userInputForm = $('#userInputForm.val()')
to var userInputForm = $('#userInputForm').val();
At last, you could modify as bellow, I believe it works:
var userInputForm = $('#userInputForm').val();
$.ajax({
url: "/createNewThing?userInput=" + userInputForm,
type: "GET",
success: function(response, status, http) {
if (response) {
console.log('AJAX worked!);
}
}
});

Sending a JSON object to Django backend through AJAX call

I have the following code (jQuery) to create a json file:
$( ".save" ).on("click", function(){
var items=[];
$("tr.data").each(function() {
var item = {
item.Code : $(this).find('td:nth-child(1) span').html(),
itemQuantity : $(this).find('td:nth-child(4) span').html()
};
items.push(item);
});
});
Now this is my AJAX function:
(function() {
$.ajax({
url : "",
type: "POST",
data:{ //I need my items object, how do I send it to backend server (django)??
calltype:'save'},
dataType: "application/json", // datatype being sent
success : function(jsondata) {
//do something
},
error : function() {
//do something
}
});
}());
Now, my doubt is how do I send the 'item[]' object that I created to the backend? I do need to send both the item[] object and the variable 'calltype' which signals what made the AJAX call, as I have the same Django View (its the Controller equivalent for Django) in the backend being called by different AJAX functions.
How will my AJAX function look like?

Hey guys just got my answer right.
I used the following ajax function to get it right:
(function() {
$.ajax({
url : "",
type: "POST",
data:{ bill_details: items,
calltype: 'save',
'csrfmiddlewaretoken': csrf_token},
dataType: 'json',
// handle a successful response
success : function(jsondata) {
console.log(jsondata); // log the returned json to the console
alert(jsondata['name']);
},
// handle a non-successful response
error : function() {
console.log("Error"); // provide a bit more info about the error to the console
}
});
}());
So, this is sort of a self answer!!! :) Thanks a lot SO!!

Calling a C# method from JavaScript

I want to to call a method GetAccount from my controller AccountController.cs, in my JavaScript factory LoginFactory.js. Something like this:
AccountController.cs:
public Account GetAccount(string userName)
{ ... }
LoginFactory.js:
if(x>y) {
var account = <%AccountController.GetAccount(someParam);%>
}
I've tried using [WebMethod] and Ajax, but I can't get it to work: I get a 404 response.

Assuming your GetAccount method can be reached at /Account/GetAccount when your application runs, you could use the following:
$.ajax({
type: 'GET',
url: '/Account/GetAccount',
data: { 'username' : 'a-username' },
dataType: 'json',
success: function(jsonData) {
alert(jsonData);
},
error: function() {
alert('error');
}
});
Note - this is dependant on jQuery.
This causes the browser to make a request to /Account/GetAccount as if you had done so by entering the URL in the URL bar, but of course, captures the returned json for use in your client side (javascript) script.
If this returns a 404, it would be worth checking your routing.