We Keep Coding

How can I update the Database on a checkbox change in MVC

I am trying to update my database when a checkbox is checked or unchecked. I want it to update when the checkbox is clicked. This is what I have so far, but my controller is never being hit. what can I do to fix it? Ideally I want to pass in the new value of customer.IsDone and customer.Id to my controller but I don't know how to do this.
Checkbox in my view
<td>#Html.CheckBoxFor(m => customer.IsDone, new { onclick = "UpdateCustomer(IsDone)" })</td>
The function in my view
function UpdateCustomer(isDone) {
$.ajax({
type: 'POST',
url: #Url.Action("UpdateCustomer", "Home"),
data: { check: isDone },
success: success,
dataType: 'json'
});
}
this is my controller method
[HttpPost]
public ActionResult UpdateCustomer(bool check)
{
//code will be here to update the db
var customers = new CustomerGetAll();
var list = customers.Execute();
return View("Customers", list);
}

I see few issues in your code.
First of all, you are passing IsDone variable when calling the UpdateCustomer method. But where is isDone defined ?
Second, this line,
url: #Url.Action("UpdateCustomer", "Home"),
The Url.Action helper will output a string and your code will be like this when rendered in the browser
url: /Home/UpdateCustomer,
Now the browser's javascript framework usually thinks the second part after : as a js variable and if you have not defined it,it will throw a syntax error about using a not defined variable! But since we have \, you will get another "Invalid regular expression flags" syntax error!
You should wrap the result in quotes to avoid this problem.
The below code should work
#Html.CheckBoxFor(m =>customer.IsDone, new { onclick = "UpdateCustomer(this)" })
and the script
function UpdateCustomer(elem) {
var isDone = $(elem).is(':checked');
$.ajax({
type: 'POST',
url: "#Url.Action("UpdateCustomer", "Home")",
data: { check: isDone },
success: function(res) {
console.log(res);
},
dataType: 'json'
});
}
Also, If you want to update a specific customer record, you probably want to pass the customer Id as well when making the ajax call. You may keep that in html 5 data attribute on the checkbox markup and read that and use that as needed.
#Html.CheckBoxFor(m =>customer.IsDone, new { onclick = "UpdateCustomer(this)",
data_customerid = customer.Id })
This will render the checkbox with html5 data attribute for "data-customerid". All you have to now do is, read this value and send it via ajax
function UpdateCustomer(elem) {
var isDone = $(elem).is(':checked');
var cid = $(elem).data('customerid');
$.ajax({
type: 'POST',
url: '#Url.Action("UpdateCustomer", "Home")',
data: { check: isDone,customerId:cid },
success: function(res) {
console.log(res);
}
});
}
Make sure your server action method has a new parameter to accept the customer id we are sending from client side code
[HttpPost]
public ActionResult UpdateCustomer(bool check,int customerId)
{
// to do : Save and return something
}

I have something similar, and I think you can solve your problem...
My HTML
<td>
#{
bool avalia1 = false;
#Html.CheckBox("avalia1", avalia1, new { autocomplete = "off", data_on_text = "Sim", data_off_text = "Não" })
}
</td>
JS
var avalia1 = $("#avalia1").is(":checked");
var url = "/Telefonia/GravarAvaliacao";
$.ajax({
url: url,
datatype: "json",
data: { 'avalia1': avalia1,'idgravacao': idgravacao },
type: "POST",
success: function (data) {
}
});
}
ON CONTROLLER
public JsonResult GravarAvaliacao(bool avalia1, string idgravacao)
{
string _userId = User.Identity.GetUserId();
var avaliaData = new OperadorAvaliacaoData();
avaliaData.GravaAvaliacao(avalia1, idgravacao);
return Json(true, JsonRequestBehavior.AllowGet);
}
The only diference is your model checkbox, and the action trigger.

function is taking Null value by ajax in mvc5

This ajax is calling from .cshtml file to controller but getValue function is taking Null value on load, but afterwards it works fine. It evens shows the value on alert on ajax call, but getting null on controller. Any help would be highly appreciated.
<script>
$(document).ready(function(){
//get value from dropdown list
var ID = $('#cmb').val();
// ID is taking value
$.ajax({
// /ControllerName/FunctionName
// /Home/getvalue
url: "/Home/getValue",
type: "POST",
// ID is getting from dropdownList
// parameterName/value
data: JSON.stringify({'_ID':ID}),
dataType: "json",
traditional: true,
contentType: "application/json; charset=utf-8",
success: function (data) {
if (data.status == "success") {
//if got response
//alert(data.status);
}
},
error: function () {
//if if not response
//alert('something went wrong');
}
});
});
</script>
[HttpPost]
public JsonResult getValue(string _ID)
{
string a = _ID;
}

It is reasonable that you are taking null on the load, since the value of HTML element with id cmd would be undefined, since I assume that there isn't any value that is selected (option of a select element has an attribute called selected, when you have selected a value this attribute has the value true).
The strange thing is that you say that afterwards works as it is expected. I doubt this, except if you have any other code that you haven't include it in your post. As it seems there is only an AJAX call after the successfull load of the DOM.
Usually we register to an event, when we make an AJAX call like this. I could assume that you could register to the onChange event of the value of select element (dropdown)
$(document).ready(function(){
$("#cmb").on("change", function(){
//get value from dropdown list
var ID = $(this).val();
// ID is taking value
$.ajax({
// /ControllerName/FunctionName
// /Home/getvalue
url: "/Home/getValue",
type: "POST",
// ID is getting from dropdownList
// parameterName/value
data: JSON.stringify({'_ID':ID}),
dataType: "json",
traditional: true,
contentType: "application/json; charset=utf-8",
success: function (data) {
if (data.status == "success") {
//if got response
//alert(data.status);
}
},
error: function () {
//if if not response
//alert('something went wrong');
}
});
});
});

You have to change your URL and parameter check below code for that :
$(document).ready(function(){
//get value from dropdown list
var ID = $('#cmb').val();
// ID is taking value
$.ajax({
url: "/Home/getValue?_ID=" + ID,
type: "POST",
dataType: "json",
data: 'json',
success: function (data) {
if (data.status == "success") {
//if got response
//alert(data.status);
}
},
error: function () {
//if if not response
//alert('something went wrong');
}
});
});
Cheers !!

Change Paramaters Name
use id in replace of _ID
[HttpPost]
public JsonResult getValue(string id)
{
string a = id;
}
$(document).ready(function(){
$("#cmb").on("change", function(){
//get value from dropdown list
var id= $(this).val();
// ID is taking value
$.ajax({
// /ControllerName/FunctionName
// /Home/getvalue
url: "/Home/getValue",
type: "POST",
// ID is getting from dropdownList
// parameterName/value
data: JSON.stringify({'id':ID}),
dataType: "json",
traditional: true,
contentType: "application/json; charset=utf-8",
success: function (data) {
if (data.status == "success") {
//if got response
//alert(data.status);
}
},
error: function () {
//if if not response
//alert('something went wrong');
}
});
});
});

if you are sure that your ID is not null then just try this.
<script>
$(document).ready(function(){
var ID = $('#cmb').val();
$.ajax({
url: "/Home/getValue",
type: "POST",
data: {_ID:ID},
dataType: "json",
contentType: "application/json; charset=utf-8",
success: function (data) {
if (data.status == "success") {
//if got response
//alert(data.status);
}
},
error: function () {
//if if not response
//alert('something went wrong');
}
});
});

Auto Complete in Razor MVC.NET [duplicate]

I am using ASP.NET MVC3 with EF Code First. I have not worked previously with jQuery. I would like to add autocomplete capability to a dropdownlist that is bound to my model. The dropdownlist stores the ID, and displays the value.
So, how do I wire up the jQuery UI auto complete widget to display the value as the user is typing but store the ID?
I will need multiple auto complete dropdowns in one view too.
I saw this plugin: http://harvesthq.github.com/chosen/ but I am not sure I want to add more "stuff" to my project. Is there a way to do this with jQuery UI?

Update
I just posted a sample project showcasing the jQueryUI autocomplete on a textbox at GitHub
https://github.com/alfalfastrange/jQueryAutocompleteSample
I use it with regular MVC TextBox like
#Html.TextBoxFor(model => model.MainBranch, new {id = "SearchField", #class = "ui-widget TextField_220" })
Here's a clip of my Ajax call
It initially checks its internal cached for the item being searched for, if not found it fires off the Ajax request to my controller action to retrieve matching records
$("#SearchField").autocomplete({
source: function (request, response) {
var term = request.term;
if (term in entityCache) {
response(entityCache[term]);
return;
}
if (entitiesXhr != null) {
entitiesXhr.abort();
}
$.ajax({
url: actionUrl,
data: request,
type: "GET",
contentType: "application/json; charset=utf-8",
timeout: 10000,
dataType: "json",
success: function (data) {
entityCache[term] = term;
response($.map(data, function (item) {
return { label: item.SchoolName, value: item.EntityName, id: item.EntityID, code: item.EntityCode };
}));
}
});
},
minLength: 3,
select: function (event, result) {
var id = result.item.id;
var code = result.item.code;
getEntityXhr(id, code);
}
});
This isn't all the code but you should be able to see here how the cache is search, and then the Ajax call is made, and then what is done with the response. I have a select section so I can do something with the selected value

This is what I did FWIW.
$(document).ready(function () {
$('#CustomerByName').autocomplete(
{
source: function (request, response) {
$.ajax(
{
url: "/Cases/FindByName", type: "GET", dataType: "json",
data: { searchText: request.term, maxResults: 10 },
contentType: "application/json; charset=utf-8",
success: function (data) {
response($.map(data, function (item) {
return {
label: item.CustomerName,
value: item.CustomerName,
id: item.CustomerID
}
})
);
},
});
},
select: function (event, ui) {
$('#CustomerID').val(ui.item.id);
},
minLength: 1
});
});
Works great!

I have seen this issue many times. You can see some of my code that works this out at cascading dropdown loses select items after post
also this link maybe helpful - http://geekswithblogs.net/ranganh/archive/2011/06/14/cascading-dropdownlist-in-asp.net-mvc-3-using-jquery.aspx

Object obect error on jquery ajax request on dropdown change?

I'm using jquery ajax on dropdown change function.The problem is that even before hitting the url mentioned in the ajax request I'm getting Object object error.
The ajax request is as follows
$("#locationList").change(function () {
var locationNo = document.getElementById('<%=locationList.ClientID%>').value;
$.ajax({
url: "HealthReport.aspx/GetCashsafes",
data: "{ 'Location': '" + locationNo + "'}",
type: "POST",
dataType: "json",
contentType: "application/json; charset=utf-8",
success: function (data) {
alert("Success");
response($.each(data.d, function (key, value) {
$("#CashSafeList").append($("<option></option>").val(value.CashsafeId).html(value.CashsafeDisplaySerialNo));
}));
},
error: function (result) {
alert(result);
$("#CashSafeList").append($("<option></option>").val("-1").html("Select one"));
}
});
});
The server side code is as follows
[WebMethod]
public static string GetCashsafes(string Location)
{
Decimal userId = (Decimal)AMSECSessionData.userId;
List<Cashsafe> lstCashSafe = DropDown.getCashSafeListLocationwise(userId, Convert.ToDecimal(Location));
List<CashSafeSelect> lstCashSafeSelect = new List<CashSafeSelect>();
lstCashSafeSelect = lstCashSafe.Select(item => new CashSafeSelect()
{
CashsafeId=(decimal)item.CashsafeId,
CashsafeSerialNo=item.CashsafeSerialNo.ToString()
}).Distinct().ToList();
System.Web.Script.Serialization.JavaScriptSerializer jSearializer =
new System.Web.Script.Serialization.JavaScriptSerializer();
string sjson=jSearializer.Serialize(lstCashSafeSelect);
return sjson;
}
I've checked the string sjson and the data is returning correctly in json format.
Since the error is showing even before the url is hit,i'm confused on how to proceed further.
Any help will be appreciated.

Change the data like this
data: JSON.stringify({ 'Location': locationNo }),
Then your code will look like
$("#locationList").change(function () {
var locationNo = document.getElementById('<%=locationList.ClientID%>').value;
$.ajax({
url: "HealthReport.aspx/GetCashsafes",
data: JSON.stringify({ 'Location': locationNo }),
type: "POST",
dataType: "json",
contentType: "application/json; charset=utf-8",
success: function (data) {
alert("Success");
response($.each(data.d, function (key, value) {
$("#CashSafeList").append($("<option></option>").val(value.CashsafeId).html(value.CashsafeDisplaySerialNo));
}));
},
error: function (result) {
alert(result);
$("#CashSafeList").append($("<option></option>").val("-1").html("Select one"));
}
});
});
Edit
Since your dataType is json, you should return json, not string. Change your server side code like this,
[WebMethod]
public static List<CashSafeSelect> GetCashsafes(string Location)
{
Decimal userId = (Decimal)AMSECSessionData.userId;
List<Cashsafe> lstCashSafe = DropDown.getCashSafeListLocationwise(userId, Convert.ToDecimal(Location));
List<CashSafeSelect> lstCashSafeSelect = new List<CashSafeSelect>();
lstCashSafeSelect = lstCashSafe.Select(item => new CashSafeSelect()
{
CashsafeId=(decimal)item.CashsafeId,
CashsafeSerialNo=item.CashsafeSerialNo.ToString()
}).Distinct().ToList();
return lstCashSafeSelect;
}
You dont have to serialize those lists

Issue solved,Thanks to every one who replied especially #Anoop.
Issue was that I've set Autopostback=true for the dropdown where the ajax call is made.I've removed the autopostback property of the dropdown and now the code is working fine.
I wonder how a fresh day,clear mind helps to solve the issues.

asp.net mvc 3 highchart

In addition to my previous question, I tried to use the same working code (for MVC2) in a MVC3 project. I figured out it's not possible to use the jQuery.getJSON method. So I tried to use the $.post and $.ajax method instead, but again facing a problem.
In both methods I get an error "Jscript: JB is empty or not an object"
$.post("Home/GetLineData", null, function (items) {
var series = [];
jQuery.each(items, function (itemNo, item) {
//Get the items from the JSON and add then
//to the data array of the series
series.push({
name: item.Key,
data: item.Value
})
});
options.series = series;
chart = new Highcharts.Chart(options);
chart.render();
});
$.ajax({
type: "POST",
dataType: "json",
data: "{}",
contentType: "application/json; charset=utf-8",
url: "/Home/GetLineData",
cache: false,
succes: function (data) {
var series = [];
jQuery.each(data, function (itemNo, item) {
//Get the items from the JSON and add then
//to the data array of the series
series.push({
name: item.Key,
data: item.Value
})
});
options.series = series;
//Create the chart
chart = new Highcharts.Chart(options);
chart.render();
},
error: function (XMLHttpRequest, textStatus, errorThrown) {
alert(errorThrown);
}
});
Thanks in advance for helping me out (again :-s).

The problem was in the HTML, so the container element was not found.
So now both methods are working!
Jorelie.

BTW - you can use getJSON in MVC 3.0, but your controller method has to return the JSON object with a second parameter like so :
Json(result, JsonRequestBehavior.AllowGet);