I wanted to invoke a .net webservice which is hosted locally on my machine from jQuery .ajax().
the script is included in the static .html file.
the success function is triggered but the response data is NULL.
$.ajax({
type: "GET",
data: '{continent: "' + $('#txtContinent').val() + '"}',
url: "http://localhost:60931/Service1.asmx/GetCountries",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(response) {
alert(response);
},
failure: function(msg) {
$('#result').empty().append(msg);
}
});
When i alert the response its giving me NULL,
can anyone tell me where im goin wrong, Thanks in advance.
Its because you might be calling the ajax from a static page which is not in http://localhost:60931/. You can put the static html in the localhost and try to run it via the same url. Or you can debug your ajax call by adding
error : function(xhr,status,error){
alert(status);
},
Related
Please some one help me.
my problem is that when i call the .net webservice using ajax windows phone 8(phonegap app), i get error "object reference not set to an instance of an object" in POST method json formate send in data.
on server side json was receved all values as null.
my ajax is
$.ajax({
type: "POST",
url: url,
data: JSON.stringify(data),
contentType: "application/json; charset=utf-8",
dataType: "json",
processData: true,
success: function (data, status, jqXHR) {
console.log(jqXHR.getAllResponseHeaders()+"ajax.responseText==>" + jqXHR.responseText);
},
error: function (xhr) {
console.log(xhr.responseText+"<==ajax.getAllResponseHeaders==>"+xhr.getAllResponseHeaders());
}
});
do not stringify data before sending
My Ajax call is really simple as below:
function ajax(reqUrl, params , callback) {
console.log("Request URL "+reqUrl);
var cond;
cond = $.ajax({
type: 'post',
url: reqUrl,
data: params,
error:function(){ alert("some error occurred") },
success: callback
});
console.log("Server response "+cond.readyState);
}
// Call it as
var url = "/getResult";
var params = {};
params.param1 = "test1";
params.param2 = "test2";
ajax(url, params, function(returnCallback) {
console.log(returnCallback);
alert("Success");
});
That works fine in most cases. But sometimes (about 1 times in 3) it doesn't return anything to callback.
I found many questions and answers for Not working ajax in Safari but fine in chrome and FireFox. My problem is different from them, because it's fine most of the time (I don't mean it was not fine usually because when I refresh my browser, that may cause my ajax call to work).
My main question is why does my ajax call sometimes fail? I don't get any errors on my JS console. When this situation, I refresh my browser to get my ajax call to. Any Ideas?
Update:
I found that sometimes my ajax call method didn't call out because console.log("Request URL "+reqUrl); did not execute. When I don't want to refresh my browser, I clicked many times on my page's link to produce result. will something late to execute?
Finally, I found error .. Safari doesn't reload my JavaScript files again even disable Cache. So I put all of my JS code into:
$(document).ready(function(){
// start load my js functions
init();
});
to reload my JS files when my page was ready. Cheer !
I also met this problem.
When I moved all code into $(function() {}), it worked.
After that, I found I had defined a variable named key, which caused the problem.
Just rename it, all things will be running.
This seems to be a Safari issue. In this post there is a suggestion to add a beforeSend to your ajax-request.
In your case:
cond = $.ajax({
type: 'post',
url: reqUrl,
data: params,
beforeSend: function (event, files, index, xhr, handler, callBack) {
$.ajax({
async: false,
url: 'closeconnection.php' // add path
});
},
error:function(){ alert("some error occurred") },
success: callback
});
Please Test below Code. it is working fine.
$.ajax({
type: "POST",
url:'#Url.Action("getResult","Controller")',
data: "{userName :'" + userName + "',password :'" + password + "' }",
contentType: "application/json; charset=utf-8",
dataType: "html",
success: function (data) {
alert("here" + data.toString());
});
This is use for MVC application.
$.ajax({
type: "POST",
url:'getResult',
data: "{userName :'" + userName + "',password :'" + password + "' }",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (data) {
alert("here" + data.toString());
});
For Asp.net Application :
$.ajax({
type: "POST",
url:'getResult',
data: "{userName :'" + userName + "',password :'" + password + "' }",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (data) {
alert("here" + data.toString());
});
if u have still the issue than please post ur complete code here. i will test and reply soon
I get a 400 Bad Request error when I try to call WCF service from client side using ajax. Following is my code,
[OperationContract]
[WebInvoke(Method = "POST",
BodyStyle = WebMessageBodyStyle.Wrapped,
ResponseFormat = WebMessageFormat.Json)]
string[] GetUser(string Id);
$.ajax({
type: "POST", //GET or POST or PUT or DELETE verb
url: "http://localhost:58055/Service1.svc/GetUser",
crossDomain: true,
data: '{"Id": "3"}',
contentType: "application/json; charset=utf-8",
dataType: "json", //Expected data format from server
processdata: true, //True or False
success: function (msg) {//On Successfull service call
alert(msg.GetUserResult[0]);
console.log("success " + msg);
},
error: function (msg) {//On Successfull service call
console.log(msg);
}
});
Any insights would be really helpfull...
The first thing you should try is hit the URL using fiddler(so that you could post your data too) and see if you get the same error.
Are you making a cross domain request. From the example it looks like you are not. Could you remove
crossDomain: true,
line and try the jquery again.
There are other options also which unnecessay like processdata. Suggest you to use the following code and see if it works or not.
$.ajax({
type: "POST",
// the url to the service -
url: "url",
// the format that the data should be in when
// it is returned
contentType: "json",
data: '{"Id": "3"}',
// the function that executes when the server
// responds to this ajax request successfully
success: function(data) {
// put the JSON response in the employees table
}
According to the ajax api documentation the default content type is 'application/x-www-form-urlencoded'. When sending JSON, the content type should be 'application/json; charset=utf-8' except that WCF does not like that. I got the same error messages and when I removed the content type I stopped getting this error. By the way, I noticed that you set crossDomain to true, this other question is relevant to that option.
In my .net framework with MVC calling webmethod like. webservice1.asmx/helloWorld
with Ajax give error 404 not found..In my another server same code working. Is there
anything missing to call ?? and physical path give me same webserive and webmthod in my .net project.. please help me ..
EDIT
code to call the web service
$.ajax({
type: "POST",
url: "/WebServices/WebService1.asmx/HelloWorld",
data:"{}",
contentType: "application/json; charset=utf-8",
dataType: "json",
async: false,
success: function(msg) {
var data = msg.d;
},
error: function(msg) {
alert(msg);
}
});
I suspect that you have hardcoded the url to the web service in your javascript call instead of using an url helper to generate it. So try like this:
<script type="text/javascript">
$.ajax({
type: "POST",
url: "#Url.Content("~/WebServices/WebService1.asmx/HelloWorld")",
data: "{}",
contentType: "application/json; charset=utf-8",
dataType: "json",
async: false,
success: function(msg) {
var data = msg.d;
},
error: function(msg) {
alert(msg);
}
});
</script>
Notice how the url to the web service is no longer /WebServices/... but it is generated with an url helper. So if for example you deploy your application in a virtual directory in IIS the helper will take into account this virtual directory.
I have a problem to refresh a bloc in my page.
Here is the request:
> $("#pwd_lost_link").click(function(){
alert('1');
$.ajax({
type : 'POST',
url: 'test.php',
dataType: 'json',
data :{"nom" : "akbar"},
success : function(data){
$("#main_bloc").append(data.msg);
alert('2');
},
error : function(XMLHttpRequest, textStatus, errorThrown) {
alert(XMLHttpRequest.responseText);
alert(errorThrown); }
}); })
and here is the php file
<?php
$return['nom'] = "ffrfrfrfr";
echo json_encode($return)
?>
It doesn't work. It give me a status error ( 0 ) and the page is automatically reloaded
Thanks
Michaël
Confusing question Michael, not sure what you mean by "the page is automatically reloaded" but you should do 2 things:
In the $.ajax() method, make sure your success called back is handling the data correctly. You are looking for data.msg but I don't see where .msg comes from.
$.ajax({
type: "GET",
contentType: "application/json; charset=utf-8",
data: {},
dataType: "json",
url: url,
success: function(data) {
// parse data object so you can see what's being returned ex. alert(data) or alert(data[0]) or alert(data.nom)
},
error: function (xhr, status, error) {
// XHR DOM reference: http://www.w3schools.com/dom/dom_http.asp
// check for errors ex. alert(xhr.statusText);
}
});
On the PHP side, you may want to debug there to see what is being received and what you are sending back.
Aside from that using an XHR viewer like Firebug or Chrome's built-in utility (CTRL+SHIFT+I) can be very helpful.
And on a final note, if pwd_lost_link is a link elment a id="pwd_lost_link" href="..." then you will have to stop the browser from following the link before you process the AJAX.
$("#pwd_lost_link").click(function(e) {
e.preventDefault();
alert('1');
$.ajax({
...
});
If you aren't seeing the '1' being alerted then that is definitely your first problem.
You're trying to access data.msg, but your PHP script is only creating data.nom. So data.msg doesn't exist. Try changing data.msg to data.nom and see if this does what you want.