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How to send a JavaScript object on the server side (ASP NET MVC)?

Below is the relevant code (JS+jQuery on the client side):
function getuser(username, password) {
var user = new Object();
user.constructor();
user.username = username;
user.password = password;
//....
$("#a1").click(function () {
var u = getuser($("#username").val(), $("#password").val());
if (u == false) {
alert("error");
} else {
//....
}
});
}
The question is how to send var u to a session on the server side?

You can use ajax to accomplish this. Something like:
$.ajax({
url: "/Controller/Action/",
data: {
u: u
},
cache: false,
type: "POST",
dataType: "html",
success: function (data) {
//handle response from server
}
});
Then have a controller action to receive the data:
[HttpPost]
public ActionResult Action(string u)
{
try
{
//do work
}
catch (Exception ex)
{
//handle exceptions
}
}
Note that /controller/action will be specific to where youre posting the data to in your project

See the documentation
For example:
If you just want to do a simple post the following may suit your needs:
var user = getUser(username, password);
$.post(yourserverurl, user, function(response){console.log("iam a response from the server")});
As the documentation says:
This is a shorthand to the equivalent Ajax function:
$.ajax({
type: "POST",
url: url,
data: data,
success: success,
dataType: dataType
});
So In your example:
$.ajax({
type: "POST",
url: "/mycontroller/myaction",
data: {user: getUser(username, password)},
success: function(responseFromServer){//handleResponseHere},
error: function(xhr){//handleyourerrorsHere}
dataType: yourdatatype
});

I am struggling to pass data to controller through Ajax

Trying to hit DeleteJobQuote controller through Ajax but no luck. Please guide me if anyone has any idea about it. The code seems OK but not able to do so. I am writing this code to delete a particular record from database.
Controller
[HttpPost]
public ActionResult DeleteJobQuote(int jobQuoteid)
{
using (var db = new KeysEntities())
{
var delJob = db.JobQuote.FirstOrDefault(x => x.Id == jobQuoteid);
if (delJob != null)
{
delJob.Status = "Delete";
db.SaveChanges();
return Json(new { success = true, Message = "JobQuote SuccessFully Deleted!" });
}
else
{
return Json(new { success = false, Message = "Delete UnSuccessFul " });
}
}
}
And JavaScript and Knockout code for this
self.deleteJobQuote = function (jobQuote) {
debugger;
$.ajax({
url: '/Companies/Manage/DeleteJobQuote',
type: 'POST',
dataType: 'json',
data: ko.toJSON(this),
contentType: 'application/json',
success: function (result) {
if (result.success) {
$('#jobQuoteDeleteModal').modal('show');
}
else {
alert("You can not delete this record !!");
}
}
});
};

Change "data : ko.toJSON(this)" to "data: JSON.stringify({ jobQuoteid: 1 })". I have hardcoded jobQuoteid value to 1. Get it from jobQoute object.
complete code:
$.ajax({
url: '/Companies/Manage/DeleteJobQuote',
type: 'POST',
dataType: 'json',
data: JSON.stringify({ jobQuoteid: 1 }),
contentType: 'application/json',
success: function (result) {
if (result.success) {
$('#jobQuoteDeleteModal').modal('show');
}
else {
alert("You can not delete this record !!");
}
}
});

Preventing multiple form submittions with validation

Could someone please help me in locating where i need to place this code below into my validation script.
The script works great, but users are clicking more than once and the form is sending multiple times.
I tried including the code just below the if(valid) line but still does not work.
This is the code i am trying to include:
form.submit.disabled = true;
form.submit.value = "Please wait...";
This is the script:
<script type="text/javascript">
$(document).ready(function (e){
$("#nominateForm").on('submit',(function(e){
e.preventDefault();
var valid;
valid = validateContact();
if(valid) {
$.ajax({
url: "contact_mail.php",
type: "POST",
data: new FormData(this),
contentType: false,
cache: false,
processData:false,
success: function(data){
$("#mail-status").html(data);
},
error: function(){}
});
}
}));
function validateContact() {
var valid = true;
$(".nominateForm").css('background-color','');
$(".info").html('');
if(!$("#nominate-name").val()) {
$("#nominateName-error").html("Please enter a name of who you would like to nominate");
valid = false;
}
return valid;
}
});
</script>

You should put those two lins inside the if condition and after the success call, you should turn them back into the default values. Also the correct way of accessing the properties of your submit button is like below,
$('input[type="submit"]').prop('disabled', true);
$('input[type="submit"]').prop('value', 'Please wait...');
or if it has an id equal to mySubmitBtn
$('#mySubmitBtn').prop('disabled', true);
$('#mySubmitBtn').prop('value', 'Please wait...');
So your code should be,
if(valid) {
$('input[type="submit"]').prop('disabled', true);
$('input[type="submit"]').prop('value', 'Please wait...');
$.ajax({
url: "contact_mail.php",
type: "POST",
data: new FormData(this),
contentType: false,
cache: false,
processData:false,
success: function(data){
$("#mail-status").html(data);
$('input[type="submit"]').prop('disabled', false);
$('input[type="submit"]').prop('value', 'Submit');
},
error: function(){}
});
}

You can add an HTML element showing something like 'processing' and if it is processing, then skip the function.
<script type="text/javascript">
$(document).ready(function (e){
$("#nominateForm").on('submit',(function(e){
var status = document.getElementById('someHTMLElement');
if (status.innerHTML != 'processing') {
status.innerHTML = 'processing';
e.preventDefault();
var valid;
valid = validateContact();
if(valid) {
$.ajax({
url: "contact_mail.php",
type: "POST",
data: new FormData(this),
contentType: false,
cache: false,
processData:false,
success: function(data){
$("#mail-status").html(data);
},
error: function(){}
});
}
status.innerHTML = '';
}
}));
function validateContact() {
var valid = true;
$(".nominateForm").css('background-color','');
$(".info").html('');
if(!$("#nominate-name").val()) {
$("#nominateName-error").html("Please enter a name of who you would like to nominate");
valid = false;
}
return valid;
}
});
</script>

Not refreshing data each time

I have weired problem in my project.I have 2 tabs and in one tab i have chekboxes and submit button and user will select from checkboxes and on button click he will get what he has selected from checkboxes in another tab.It runs perfectly.But sometimes it does not refresh the data from ajax ,jquery and i have to complete refresh my page.I am not able to identify the problem as i am not getting any error. Atleast i have to click for more than 15 times then it will not refresh the data otherwise it works fine.
Here is my js code:
function getFahrzeuge() {
var opts = [];
$("#fahrzeuge input[type='checkbox']").each(function () {
if ($(this).is(':checked'))
{
opts.push($(this).attr("id"));
}
});
return opts;
}
function saveFahrzeugeWidget(opts){
if(opts.length == 0) return false;
$.ajax({
type: "POST",
url: "ajax/dashboard.php",
dataType : 'json',
cache: false,
data: {'filterOpts' :opts, 'aktion' : 'save-widget-vehicle'},
success: function(data){
//getFahrzeugeWidget();
$('#fahrzeuge').html(data['html']);
},
error: function(data){
console.log(data);
}
});
}
function getFahrzeugeWidget(opts){
if(!opts || !opts.length){
opts = allFahrzeuge;
}
$.ajax({
type: "POST",
url: "ajax/dashboard.php",
dataType : 'json',
cache: false,
data: {filterOpts:opts, 'aktion' : 'get-widget-vehicle'},
success: function(data){
$('#fahrzeuge').html(data.html);
},
error: function(data){
console.log(data);
}
});
}
function getFahrzeugeWidgetEdit(opts){
if(!opts || !opts.length){
opts = allFahrzeuge;
}
$.ajax({
type: "POST",
url: "ajax/dashboard.php",
dataType : 'json',
cache: false,
data: {filterOpts:opts, 'aktion' : 'get-widget-vehicle-edit'},
success: function(data){
$('#fahrzeuge').html(data.html);
},
error: function(data){
alert('error' + data);
}
});
}
$('#fahrzeuge .butt-rahmen').live('click', function(){
var opts = getFahrzeuge();
if($(this).attr('id') == 'saveId')
{
saveFahrzeugeWidget(opts);
if($('#fahrzeuge input[type="checkbox"]:checked').length <=0) {
alert('überprüfen Sie bitte atleast ein fahrzeuge');
//getFahrzeugeWidgetEdit(opts);
}
}
});

The answer is getting cached. And you are receiving the same answer. Try to add a new parameter to data as timestamp.
So your data should look like this.
data: {'filterOpts' :opts, 'aktion' : 'save-widget-vehicle', 'timestamp': new Date().getTime()},

Run Javascript function as long as condition is true

I'm building a PhoneGap app where user press button which then sends data to server. On the success handler I have a new function that asks user some questions with prompt box and then sends them back to server. So I need to make the prompt box appear as long as the condition "status=ok" is true.
I don't know how many times the prompt box has to appear, it can be anything from 1 to 10 times, so I guess I need to make a some sort of loop, but how can I do it?
This is the code I've been using now:
function UpdateRecord(update_id)
{ var id = getUrlVars()["id"];
jQuery.ajax({ type: "POST",
url: serviceURL + "update.php",
data: 'id='+id ,
cache: false,
success: function(data) {
console.log(data)
if(data.key[0].status == "ok"){
var reply = prompt(data.key[0].QUESTION, "");
jQuery.ajax({ type: "POST",
url: serviceURL + "question.php",
data: 'id='+id+'&reply='+reply ,
cache: false,
success: function(data) {
window.location = "page.html" }
} else {
window.location = "page.html"
}
}
});
}

I think what your after is moving the response from the AJAX call into a method AskQuestion (or whatever you want to call it). This function would prompt and would query if the answer was correct or not and redirect them to another page:
function AskQuestion(data)
{
var id = getUrlVars()["id"];
console.log(data);
if(data.key[0].status == "ok") {
var reply = prompt(data.key[0].QUESTION, "");
jQuery.ajax({ type: "POST",
url: serviceURL + "question.php",
data: 'id='+id+'&reply='+reply,
cache: false,
success: AskQuestion});
} else {
window.location = "page.html";
}
}
function UpdateRecord(update_id)
{
var id = getUrlVars()["id"];
jQuery.ajax({ type: "POST",
url: serviceURL + "update.php",
data: 'id='+id,
cache: false,
success: AskQuestion});
}